Tunable Diode Lasers UV, Visible, Infrared - Digital Control - Wavelength Stabilization

Atom / Ion Laser Cooling & Trapping Degenerate Quantum Gases Color Centers, Microresonators, Quantum Dots Quantum Communication, Computation & Simulation Quantum Metrology, Sensing & Spectroscopy Nanostructuring & Testing

Version 2018: for latest product information please visit our webpage https://www.toptica.com/products/tunable-diode-lasers/

www.toptica.com 1 Lithium magneto-optical trap NV center in diamond (Hanson lab @ TUDelft & NV Scanning Probe Magnetometry (L. Rodin, Centre for Quantum Photonics, CONTENTS (R. Hulet, Rice University, Houston, USA). Tremani, The Netherlands). Laboratoire Aimé Cotton, Orsay, France). University of Bristol, UK.

Applications 3 AFM tip Digital Revolution in Laser Control 4 MW antenna Tunable Diode Laser Technology 6

FP, AR and DFB Laser Diodes 7 NV detect pro Technology 8 Linewidth, Coherence, Frequency References 9

Frequency Stabilization 10 sample Amplification & Frequency Conversion 11 Continuously Tunable Diode Lasers 12 DLC CTL 13 Atom Laser Cooling & Trapping Color Centers Quantum Sensing Quantum Communication Specifications Continuously Tunable Lasers 15 • Laser cooling • E.g. N-V, Si-V, Ge-V in diamond • Magnetometry • Entangled photons Tunable Diode Lasers 16 • Magneto-optical trapping • Quantum optics • Electrometry • Photon storage DLC DL pro 17 • Dipole traps and optical lattices • Spintronics • Inertial & gravitation sensing • Single photon conversion DLC DL pro HP 18 TOPSellers DLC DL pro and DLC DL pro HP 19 DFB pro 20 Ion trap (R. Blatt, Institute for Quantum Optics Quantum dot (P. Michler, Physics Department - Strontium atom lattice clock (Ch. Lisdat, Holography principle for optical gratings SYST DL 100 21 and Quantum Information, Innsbruck, Austria). IHFG, University of Stuttgart, Germany) U. Sterr, PTB Braunschweig, Germany). (TOPTICA Photonics AG). Options Tunable Diode Lasers 22 Specifications Tunable Diode Lasers 23 High Power Lasers & Amplifiers 24 TA pro 25 TA pro TOPSeller and Customized Versions 26 BoosTA pro 27 BoosTA 28 Specifications High power laser and amplifier systems 29 Frequency-Converted Lasers 30 DLC TA-SHG pro 32 DLC TA-FHG pro 33 TA-SHG pro and TA-FHG pro TOPSeller Systems 34 Options and Customization 35 Ion Cooling & Trapping Quantum Dots Metrology Nanostructuring & Testing SYST SHG pro 36 • Ionization • Single & correlated photons • Optical atom and ion clocks • Holography Specifications Frequency-Converted Diode Lasers 37 • Laser cooling • Nanophotonics • Ultra-stable laser oscillators • Lithography • Quantum state manipulation • Semiconductor lasers • High-resolution spectroscopy • Interferometry Laser Locking & Laser Driving 38 DLC pro 39 Specifications DLC pro 40 Single-spin addressing in an atomic Mott Microdisc resonators and couplers (O. Benson, Ion trap with CCD image of fluorescing ions (R. ARCLITE LIDAR system, Greenland PDD 110/F, FALC 110 and mFALC 110 41 insulator (I. Bloch, MPQ, Garching, Gemany). Humboldt-Universität Berlin, Germany). Blatt, University of Innsbruck, Austria). (photo by Craig Heinselman). DigiLock 110 42 Photonicals - Laser Diodes and Accessories 44 Free Space Optical Isolators 45 TOPTICA Product Portfolio - Completed Overview 46 Difference Frequency Comb (DFC) 47 Single-Mode, Single-Frequency & Multi-Laser Engines 48 ps / fs Fiber Lasers 49 Terahertz Systems 50 Tunable Diode Lasers Wavelength Coverage 51

Degenerate Quantum Gases Microresonators Quantum Simulation & Computation Sensing & Spectroscopy • Bose-Einstein condensation (BEC) • Biosensing • Quantum cryptography • LIDAR & Guide Star • Degenerate Fermi gases (DFG) • Near field optics • Quantum teleportation • Trace gas analysis • Feshbach resonances • Quantum optomechanics • Photon storage & EIT • Spectroscopy

www.toptica.com 3 Convenience The user can operate the digital controller optionally available package DLC pro Lock. modules FALC and DigiLock via an DLC pro via dials, buttons and a user- It provides a Lock-in-type locking module external extension rack (DLC ext). friendly touch display. The well-organized with two feedback PID channels. Complex PC graphical user interface (PC GUI) operations like laser locking are now as The unprecedented passive stability software and a command line interface allow simple as never before. For example, of the DLC pro simplifies the use of remote operation via Ethernet or USB. The frequency locking can be activated with single-frequency tunable diode lasers DLC pro directly displays signals from the the click of a mouse or the touch of a dramatically. For example, frequency and experiment or the laser on the touch screen fingertip (“Click & Lock” and ”Tip & Lock”) power drifts are suppressed, and mode- and/or the PC GUI in x/y-, t- or FFT-mode, to locking points suggested by the hopping is reduced or even excluded. reducing the need for additional external DLC pro. In addition, advanced ReLock The DLC pro also comes with integrated oscilloscopes. As special feature, one can functions are integrated as well. power stabilization and for some systems adjust scan parameters with multi-gestures with optional automatic alignment. on the touch screen, as if using a modern The DLC pro can also be combined with smartphone. A software key activates the TOPTICA’s well-established fast locking

Convenient laser control via remote PC- operation: Users can easily set all relevant DIGITAL REVOLUTION IN LASER CONTROL parameters via the graphical user interface. Lowest Noise and Highest Convenience Precision The DLC pro features laser diode current, linewidth of a DL pro even well below of a DLC pro driven laser system is so DLC pro - digital laser control temperature and piezo drivers with 10 kHz. For example, a self-heterodyne excellent that active frequency stabilization In the last years, external cavity diode lowest noise and drift levels. It provides unprecedented noise and stability values, linewidth measurement of a free-running (locking) is not required. All parameters can lasers (ECDLs) have experienced a intuitive touch control and powerful remote · All-digital controller for TOPTICA’s boosting the performance of TOPTICA’s DLC DL pro laser at 1160 nm with narrow be set reliably and with ultrahigh precision. tremendous improvement. Since its operation to run and frequency-stabilize all tunable diode lasers DL pro, TA pro, established tunable diode lasers. linewidth option, exhibits a fast linewidth For example, one can directly dial in the introduction, TOPTICA’s DL pro leads the of TOPTICA’s tunable diode lasers: CTL, DFB pro, DL / TA-SHG pro and (5 μs) of only 5 kHz. laser diode current with steps as small as field of tunable diode lasers, thanks to its DL pro, CTL, TA pro, DFB pro, DL- / DL / TA-FHG pro 280 pA/√(Hz) @ 1 kHz and 490 mA 15 nA and the ECDL piezo voltage with narrow linewidth, large mode-hop-free TA-SHG pro and DL- / TA-FHG pro. · Extremely low noise and lowest drift with 30 kHz modulation bandwidth and Single-frequency diode lasers in general 10 µV increments. We have integrated tuning range and highest vibration and · Convenient dials & multi-touch 140 nV/√(Hz) @ 1 kHz and 140 V (small can exhibit significant frequency drifts if high-resolution analog-digital converters temperature-change stability. Experiments requiring a narrow linewidth user interface signal modulation bandwidth 3 kHz) are current, temperature or piezo voltages (24-bit, 300 kHz) for fast and efficient or large coherence length as well as · Remote PC GUI and command control world’s best noise figures for laser current slightly change. With its stability values communication between the main- With TOPTICA’s DLC pro, laser control has setups needing remote laser control will · Intelligent locking features and piezo voltage drivers. (< 3 ppm/K, < 140 µK/K and < 40 ppm/K, controller, the laser and the experiment. entered the digital world! The fully digital highly benefit from the revolutionary digital respectively) the DLC pro sets new laser controller sets new benchmarks for laser controller DLC pro. Thanks to the lowest noise characteristics, standards within this respect. In many Find a more detailed description of the the DLC pro can reduce the free running cases, the long-term frequency stability DLC pro features on page 38-40.

78 79 80 81 82 Frequency [MHz] A self-heterodyne linewidth measurement shows a short-term linewidth of a free-running The DLC pro sets new benchmarks: Intuitive control via touch display and DLC DL pro (narrow linewidth option) of only DLC DL pro with the external extension rack (DLC ext). The DLC ext allows combining the DLC pro excellent noise and drift performance for TOPTICA’s tunable diode lasers. 5 kHz. with TOPTICA’s fast locking modules FALC and DigiLock.

FP, AR, DFB or DBR Diodes a DBR, the grating is spatially separated are routinely attained. For measurement Fabry-Perot (FP) diodes are available from the gain section, and an additional tasks that require even wider mode-hop- at many wavelengths. In an ECDL, the phase section serves to maintain mode- free tuning ranges, e.g. quantum dot internal resonator of the FP diode acts as hop-free conditions during a scan. spectroscopy, the new CTL laser (pages an etalon and contributes to the selection Frequency tuning is accomplished by 12-15) is the system of choice. of the external lasing mode. The internal thermally or electrically varying the grating resonator is synchronized with the grating pitch, it can span many hundred GHz. A stock list with laser diodes including movement by changing the diode current all individual specifications in diode laser simultaneously. ECDL or DFB? configurations is available at www.laser- Whether to choose an external cavity diodes.com AR diodes with an antireflection-coated diode laser or a DFB/DBR laser depends output facet do not lase without external on the individual application. DFB diodes Compact and robust Littrow setup feedback and their internal resonator do not yet offer the wavelength range The most common types of ECDLs effects the mode selection much less. accessible with Littrow ECDLs. Tunable, are the so-called Littrow and Littman The AR coating further improves the narrow-band emission in the blue or red configurations. In both cases, a grating is tuning properties and mode stability of an spectral range still remains the realm of used to selectively reflect a small range of ECDL. Important specifications for FP- or external-cavity systems. An ECDL is also the diode's emission spectrum back into AR-based ECDLs are the output power the preferred choice for applications that the laser chip. This optical feedback forces available from the stabilized diode, the require a broad coarse-tuning range, or an the diode into single-frequency operation. attainable wavelength range, the mode- ultra-narrow linewidth below 1 MHz. In Littrow configuration, the first-order hop-free tuning range and the typical beam from the grating is directly reflected linewidth. Key advantages of DFB lasers are a large into the diode. continuous tuning range, and a high Distributed Feedback (DFB) and robustness with respect to acoustic noise In Littman configuration, the first-order TUNABLE DIODE LASER TECHNOLOGY Distributed Bragg Reflector (DBR) laser and humidity. The mechanical stability diffracted beam is reflected by a mirror, and diodes feature a grating structure within results from the absence of any alignment- passes the grating a second time before the semiconductor chip. The grating sensitive optical components. DFBs are being fed back into the laser diode. In Turning Laser Diodes into Diode Lasers restricts the laser emission to a single thus particularly attractive for applications both setups, the main contributions to the longitudinal mode. In a DFB diode, the in rough industrial environments. Mode- technical linewidth are usually electronic grating is integrated in the gain section. In hop-free scans of a few nanometers noise, acoustic noise and vibrations that affect the cavity length. Laser diodes Mode selection Wavelength tuning of an ECDL Laser diodes are well established Superior diode laser characteristics – like DFB and DBR diodes can be wavelength Since the grating is only passed once, the

subcomponents in a variety of consumer narrow emission linewidth, large coherence tuned by adjusting the laser diode current Grating External modes output power of Littrow lasers is higher Internal modes products, like laser pointers, barcode length, precise wavelength selection, and/or temperature. To change the ECDL Selected mode than that of comparable Littman setups. 1.0 Gain scanners, or CD/DVD/Blu-ray drives. Their and tuning or stabilization of the emission wavelength, one varies the spectral Moreover, Littrow lasers can be operated success story is driven by the fact that they frequency – are achieved by introducing response of the filter, e.g. by altering the 0.8 Overall with FP and AR diodes, while the Littman mode are compact, conveniently operated, cost frequency-selective feedback into the laser angle of incidence on the grating. Because selection design usually employs AR coated diodes. effective, and highly efficient. However, the cavity. TOPTICA offers two realizations of the laser always runs at the largest overall 0.6 If properly configured, the ECDL runs on emission spectrum of bare laser diodes is tunable single-frequency diode lasers. Both gain, it hops to another longitudinal mode 0.4 a single-mode of the external resonator,

broad, and the lasing wavelength is not make use of grating structures to select and emits at a new wavelength. Relative Intensity i.e. the mode with the highest overall gain. well defined. and control the emission frequency. 0.2 One is a grating-stabilized external cavity Fine-tuning of the laser wavelength is To find out on which external mode the 0.0 In general, the two facets of the laser diode laser (ECDL). It incorporates an achieved by changing the length of the -100 -50 0 50 100 laser is running one must consider the Frequency (GHz) diode form a resonator and determine optical grating mounted in front of the external cavity. This shift of the supported gain and the internal mode structure of Littrow-type external cavity diode laser (left) and single-mode selection (right). the (longitudinal) lasing modes. The wide laser diode while a second resonator single longitudinal mode the laser is running the laser diode, the grating filter and the gain profile of the semiconductor supports forms “externally” between the diode’s on. A large mode-hop-free tuning range external cavity length. many modes simultaneously, each with back facet and the feedback element. The results from accurate synchronization of as 0 a different frequency. Even diodes with other approach features laser diodes with many contributions as possible. TOPTICA’s 0 a single longitudinal mode exhibit mode- gratings built into the semiconductor itself: DL pro laser, for example, achieves largest -20 -20 hopping upon slightest variations of the distributed feedback (DFB) and distributed mode-hop-free tuning by simultaneously chip temperature or driver current. The Bragg reflector (DBR) laser diodes. varying grating angle, length of the external -40 -40 result is an imperfect, spectrally unstable cavity and laser diode current. output beam. The grating filter, the semiconductor gain -60 Relative intensity (dB) -60 Relative intensity (dB) profile, the internal laser diode modes and Coarse wavelength alignment is often -80 TOPTICA converts laser diodes into diode – if applicable – the external cavity modes realized with a micrometer screw (optionally 770 780 790 720 740 760 780 800 lasers, meaning high-end laser tools, determine the lasing mode(s). Precise motorized) while fine-tuning is implemented Wavelength (nm) Wavelength (nm) by integrating additional mode selection temperature and current control as well as electronically by applying voltages to a Laser diode with (red) and without (blue) external grating feedback. elements as well as adding best-in-class proper matching of the components are a piezo actuator that holds the grating or The left graph shows an FP diode, the right graph an AR diode. drivers and optics. must for stable single-mode operation. changing the laser diode current directly.

6 www.toptica.com www.toptica.com 7 pro Technology Linewidth, Coherence, Frequency References

The pro technology provides best in their unit includes collimation optics and can pro technology Linewidth, frequency noise and drift io tp itiic a ct oi a ct it class lasers with an optimized opto- handle currents up to 10 A thanks to an The Schawlow-Townes formula provides i p mechanical setup in one solid metal block. optimized heat conductivity. The pro- a theoretical minimum of a laser’s line- · Stability cotic iatio miit mpat They are robust and at the same time prietary SHG/FHG cavities are air-sealed width, which can be very narrow in case · Ease of use io oi mpat coto io it widely tunable as well as user-friendly. and allow for adjustment of key optical of ECDLs. In reality, many processes af- · Thermal and acoustic ruggedness The revolutionary narrow linewidth ECDL components from outside. If required, we fect the optical path length of the laser m · Hands-off operation wherever possible Main causes for frequency variations in ECDLs and their respective time scales. DL pro has long proven its invulnerability employ patented kinematic mirror mounts resonator and hence the laser frequency. against temperature changes and acoustic based on flexure technology. They ensure · Flexure joints wherever expedient Current fluctuations change the refracti- disturbances ever since. Its patented the highest stability of beam steering and · Internationally patented design ve index and the temperature within the design incorporates wire-eroded flexure are easily accessible from the top. (DE 1 2007 028 499, US 7,970,024) laser diode. Acoustic noise and vibrations m m m mm l joints and a virtual pivot point allowing directly affect the mechanical resonator c alignment-free wavelength selection and The new DLC pro controller gets the best length. In an ECDL, temperature, air pres- po op iam o large mode-hop-free tuning. out of our pro technology lasers. It provides that extra bit “more” that is required for sure and humidity modify the refractive po lowest noise, best passive electronic leadership in instrument manufacturing or index of air in the external resonator. Pro- po The amplified TA pro and the frequency- stability, touch screen and remote control, state-of-the-art physics experiments. One cesses that are faster than the laser fre- po converted DL/TA-SHG/FHG pro systems frequency locking and other digitally can focus fully on the task while the laser quency measurement itself add to the po oc wit build on the superior DL pro. The TA chip enabled features. Together, they deliver will simply do its job. laser’s technical linewidth. Slower pro- to cait cesses will “only” lead to a frequency drift between successive measurements. When comparing linewidth values, it is ∆ν Typical coherence length l and linewidth of TOPTICA diode lasers. important to consider the time scale of c ∆ν the measurement.

Laser linewidth and coherence length The resulting beat signal between the accomplished by measuring the beat Laser linewidth and coherence length are laser and its delayed self can be observed width of two identical lasers with a fast inverse proportional with a numerical fac- e.g. with a RF spectrum analyzer. 1 km detector and an RF spectrum analyzer, by tor that depends on the exact spectral line fiber length corresponds to a time delay using a Fabry-Perot interferometer or by shape. For a Gaussian profile, the cohe- of 5 μs and only frequency fluctuations directly determining the coherence length rence length is 132 m / linewidth [MHz] as within this time contribute. The laser line- with a Michelson interferometer. long as the result is smaller than the pro- width is 1/2 … 1/√(2) times the width of duct of the speed of light and the linewidth the beat signal’s central peak as long as Frequency references measurement time, i. e. 1500 m for 5 µs. the corresponding coherence length is Active frequency stabilization of a laser pro electronics (DLC pro) Patented resonator design (master) Optimized TA pro mount smaller than the optical fiber length. calls for an external reference that serves · All digital controller for TOPTICA’s · Largest mode-hop-free tuning range · Modular setup Linewidth measurement as a frequency discriminator. Atomic or tunable diode lasers DL pro, TA pro, · Highest acoustic and thermal stability · On-site exchange of pre-aligned In a delayed self-heterodyne linewidth If the laser’s coherence length is much molecular absorption lines, spectral lines CTL and DL-SHG pro · Latest production technologies components measurement, one splits the laser beam larger, an interference modulates the beat of a frequency comb or wavelength meters · Extremely low noise and precise control (wire erosion) · Optimized heat management into two parts. One part is frequency- signal and one can extract a linewidth are used for absolute stabilization and drift · Intuitive and convenient · DC & AC - coupled modulation board shifted by an acousto-optical modulator value by matching the modulation depth compensation. Relative frequency referen- and delayed in a long fiber. Both beams with a parameterized model. Linewidth ces include high-finesse optical resonators are then overlapped on a fast detector. measurements on longer time scales are or etalons.

HF input (80 MHz) frequency comb 420 - 2200 nm Isolator, 60 dB Fiber delay 1000 m Laser Head HFC FPI Performance Acousto-optical modulator WSU-2 350 - 1120 nm WSU-10 800 - 1750 nm 1 measured 0.1 calculated 0.01 (5 kHz) Beam CoSy 765 - 895 nm Patented flexure-based ultra-stable Proprietary resonator design Laser head machined from a solid 1E-3 combiner Wavelength kinematic mirror mounts (SHG-unit) metal block 1E-4 Laser driver -5 Comparison of frequency references. The per- 1E To RF spectrum analyzer · Accessible from top with closed · Air-sealed resonator · Highest stability against vibration and Beat signal [a.u.] 1E-6 formance represents aspects like accuracy, or sampling oscilloscope laser head · Manufactured from one solid metal block acoustic noise Fast PD repeatability or achievable linewidth. Shown 78 79 80 81 82 are: Frequency comb (DFC) wavelength · Wire erosion technology based · Mirror mounts and SHG crystal · Reduced long-term and temperature drift Frequency [MHz] meters (WSU), spectroscopy cells (CoSy), · Independent horizontal and adjustable with closed resonator lid Fabry-Pérot interferometers (FPI), and high vertical adjustment Delayed self-heterodyne linewidth measurement and typical result. finesse cavities (HFC).

8 www.toptica.com www.toptica.com 9 Frequency Stabilization Amplification & Frequency Conversion

To actively frequency stabilize a laser, the incident on a spectroscopy setup. The le optical phase locking is performed by Amplifying laser diodes But it can be achieved using birefringent laser frequency is compared with a set observed signal is demodulated at the beating the laser with a second one or a Specially shaped semiconductor optical crystals and different polarizations of value, and a feedback circuit corrects any modulation frequency with proper phase. frequency comb. In both cases, the error amplifiers, or Tapered Amplifiers (TAs), the light waves. Depending on crystal deviations from this set value. Besides the The resulting derivative of the spectros- signal generation is extremely fast and one serve to increase the power available type and operating wavelength, one can accuracy or the stability of the frequency copic signal forms an error signal with can fully exploit the performance of special from single-mode diode lasers in a fine-tune the phase matching by proper reference, an important parameter is the zero-crossing and non-zero gradient at the high-bandwidth locking electronics. Master Oscillator Power Amplifier (MOPA) adjustment of the crystal temperature or rate of correction – in other words the frequency corresponding to the spectros- configuration. The master laser beam is the angle between crystal axis and light bandwidth of the control loop. It is limi- copy maximum. Again, a locking regulator TOPTICA locking modules coupled into the single-mode channel propagation. Amplifier chip mounted on TOPTICA’s ted by the time required for the frequency stabilizes the laser frequency, this time to TOPTICA takes pride in having the lar- of the TA chip, which mainly acts as a proprietary heat sink. comparison and the design of the feed- the top of the fringe. The modulation can gest portfolio of locking units with outper- spatial mode filter. In the subsequent Resonant enhancement back circuit, i. e. the used regulator modu- be applied to the laser diode current or just forming characteristics: highest speed, tapered section, this “perfect” beam is Frequency conversion TOPTICA’s SHG systems use a les and the feedback elements. For active to the light of the reference setup using an maximum comfort, largest versatility, lo- further amplified in single pass while freely Despite the impressive success compact rugged bow-tie resonator with linewidth narrowing or phase locking, one EOM or an AOM. west noise and minimum drift. Whatever diverging in the tapered plane but being story of semiconductor lasers, some optimized mirror coatings to enhance the even has to consider the lengths of the op- is important and whatever locking task confined in the orthogonal plane. wavelength or power regions cannot fundamental laser power resonantly by a tical beam path and the cables. Operation Linewidth narrowing & phase locking has to be accomplished – the TOPTICA be directly accessed with current laser factor of 50 to 400. For this, the resonator convenience strongly favors digital locking. One can reduce the linewidth of a laser and solution is already there. A descripti- After exiting the large AR-coated output diode technology. Nonlinear frequency length has to be actively stabilized with

ia Offset even lock its optical phase to a reference on of our locking modules can be found facet of the amplifier chip, this light can conversion techniques close these gaps. respect to the fundamental wavelength. a

voltage Side-of-fringe lock if the response of the locking circuit to de- oni pages 38-42 of this catalog and on be shaped again into a high-quality beam TOPTICA’s frequency-converted laser Employing the Pound-Drever-Hall method i One can stabilize a laser to a spectrosco- viations of the laser frequency/phase is www.toptica.com . One can also use the with similar spectral quality as before. systems (pages 30-37) generate tunable allows for tight locking with high long- pic reference or the transmission of an FPI much faster than the speed at which these integrated PID option of our wavelength Typically, a small-signal gain of up to 20 dB cw laser radiation in the DUV, UV, blue, term stability and guarantees high power ia with a “side-of-fringe” lock. Subtracting a changes occur. For linewidth narrowing, meters if a laser has to be stabilized and maximum output levels of up to 3.5 W green, yellow, orange, and red spectral with lowest noise figures. Together with o ia c ranges. We take pride in providing highest

constant offset voltage from the original si- one uses the Pound-Drever-Hall technique to them with relatively low bandwidth can be achieved. our best-of selection of NLO crystals, we gnal (“fringe”) such that the difference bet- together with high finesse resonators whi- < 100 Hz, i.e. against drift. power levels with unprecedented stability. achieve highest conversion efficiencies ween the two is around zero with non-zero TOPTICA is constantly working together and easiest handling in the market. i gradient an error signal is generated on the Principle of side-of-fringe (left) and top-of-fringe locking (right). with renowned partners on TA chip Second Harmonic Generation (SHG) side of the fringe. An appropriate locking development. The main aims of this The SHG process can be explained in two regulator adjusts feedback elements such initiatives are: ways. In the wave picture, the fundamental

ia Offset electromagnetic wave with frequency that the error signal in lock is zero and the • to provide TAs chips at new wavelengths ω1 a oatio t

i drives the polarization of a non-linear optic laser frequency is stabilized to the corres- • to improve the output power of TA chips Principle of Second Harmonic Generation (SHG). tpt t i ponding side of the fringe zero-crossing of • to maintain the availability of TA chips (NLO) crystal. Due to the non-linearity, the

the error signal. iia ia polarization oscillates also at the “second- ia Examples for successful developments harmonic” frequency ω2=2·ω1. o ia Top-of-fringe lock c are the extension of the NIR-A wavelength

To lock to the maximum of a spectroscopic limit from 1083 nm to 1357 nm by several This causes the emission of a coherent

Principle of Fourth Harmonic Generation (FHG). signal (“top-of-fringe locking”), a signal novel TA chips with multi-Watt output electromagnetic wave at the frequency i

iati ω . In the photon picture, two photons of generator modulates the laser frequency power, the introduction of a new TA chip 2 Fourth Harmonic Generation (FHG) the fundamental laser wavelength λ are for amplification around 690 nm and the 1 Fourth harmonic generation quadruples re-establishment of TA chips that reliably converted inside the NLO crystal into one the frequency of an electromagnetic provide > 500 mW at 670 nm. TOPTICA’s photon with half the original wavelength DLC pro Lock* DigiLock 110 FALC 110 mFALC PID 110 PDD 110/F wave. TOPTICA’s FHG systems use two oatio t high power diode lasers are presented on λ2=0.5·λ1. The SHG efficiency increases PID regulator, PID regulator, tpt t consecutive SHG stages in one laser head. mixing PID PDH error signal pages 24-29. with the fundamental power, the non- Description / Type lock-in error lock-in/PDH error PID regulator PID regulator In total, four photons of the fundamental

iia ia regulator generator linearity of the utilized crystal and proper signal generator signal generator laser with frequency ω1 are converted all-digital, low versatile digital fast, analog, fast, analog, analog, high phase matching. Specials analog, slow into two photons with frequency ω2=2·ω1 noise, convenient locking solution for experts for experts bandwidth and then into one photon with frequency PDH locking, FM or Entrance facet, Injected beam Phase matching: n(λ ) = n(λ ) linewidth side of fringe 1 2 ω =2·ω =4·ω and wavelength λ =0.25·λ . Main application spectroscopy lock all phase locking modulation transfer AR coated 4 2 1 4 1 narrowing spectroscopy Single-mode Phase matching implies that the refractive spectroscopy By this method, we have demonstrated iati channel indices n(λ) of the fundamental and the Side-of-fringe     cw laser radiation down to 190 nm (1) with frequency-converted light are equal within more than 15 mW at 193 nm (2). Top-of-fringe   with PDD with PDD  Tapered amplifier the NLO crystal. This leads to a constructive fast, super fast with super fast with with FALC, DigiLock, Pound-Drever-Hall (PDH) slow with PDD interference of second-harmonic partial PDD PDD DLC pro Lock, PID Intensity monitor waves generated at different positions photodiode Blue output Max. regulator bandwidth ≈ 30 kHz ≈ 10 MHz ≈ 45 MHz ≈ 45 MHz kHz .. 100 kHz ≈ 7 MHz within the crystal along the direction of NLO crystal Modulation frequency 11 Hz .. 30 kHz 17 Hz .. 25 MHz 12 - 35 MHz** light propagation (wave picture). It also Photodiode for cavity stabilization Signal analysis FFT  guarantees momentum conservation: Piezo Relock mechanisms    Two photons of momentum p1 = n(λ1)·h/λ1 Tapered gain region Output facet, are converted into one photon of Computer control   AR coated momentum p = n(λ )·h/λ =2·p . Dispersion Resonant doubling High bandwidth output     2 2 2 1 cavity Geometry of a tapered amplifier chip. usually prevents phase matching. No. of feedback channels 2 2 (+1) 2 2 1 n.a. Second Harmonic Generator (sketch). *software license for DLC pro **5- 70 MHz versions available 1 Scholz et al., Optics Express 20, 18659 (2012 ) 2 Scholz et al., Appl. Phys. Lett. 103, 051114 (2013)

High resolution Low noise & drift Motorized coarse tuning and scanning Narrow linewidth as well as low noise happens with steps down to 0.3 pm in and drift, are important requisites for size. While individual steps can be seen high resolution and repeatable spectral in slow scans with a highly sensitive measurements. The linewidth of the CTL measurement, above a certain scan is smaller than 10 kHz (measured with speed, scans are smooth. The maximum delayed self-heterodyne setup with 5 µs scan speed is 10 nm/s. If even higher delay) and allows highest resolution, resolution is desired, piezo sans can while the completely digital electronics be performed across more than 500 DLC pro offers the lowest drifts of Laser system DLC CTL: The mode-hop-free motor steps. The piezo is addressed diode current, temperature and piezo widely tunable laser is equipped with TOPTICA’s with 24 bits resolution, and the smallest voltage commercially available – allowing all digital controller DLC pro. piezo step size is smaller than 5 kHz. for excellent stability and repeatability.

For even more precise and high Examplary measurements of the passive Key Features bandwidth modulation or regulation, frequency stability and the linewidth of direct access via a safe modulation the DLC CTL laser system are shown on · Wide mode-hop-free tuning: circuit in the laser head offers modulation pages 14 and 15. Up to 110 nm bandwidths of approx. 100 MHz. Utilizing this input, it is possible to phase lock or · High resolution: Step size as small as 5 kHz stabilize CTL down to the Hz level. · Low noise & drift: CONTINUOUSLY TUNABLE DIODE LASERS Linewidths below 10 kHz Mode-hop-free tuning across the full diode spectrum · Total touch, knob & remote control: All digital DLC pro – hands off

Wide mode-hop-free tuning achieve mode-hop-free tuning across a pending) ensures mode-hop-free Our Continuously Tunable Lasers (CTLs) few nm up to a few 10 nm. operation across the complete gain scan smoothly without any mode- In order to achieve wider and guaranteed spectrum of the diode. hopping over very wide ranges. General- mode-hop-free tuning – even across the ly, wide mode-hop-free tuning requires full gain spectrum of the diode – not only The active control loop analyzes several excellent mechanical design and perfect excellent mechanical design is essential, signals in the laser head and optimizes alignment – the optical resonator has to but also active control is required. the involved tuning elements. With be stable on a nm scale. Laser systems The unique SMILE technology (Single TOPTICA’s SMILE, no mode-hopping with passive resonator design can only Mode Intelligent Loop Engine, patent occurs.

. seps 1 p . . elen n Output power as a function of the wavelength e s of the CTL 1550. The smooth power variation of Motorized mode-hop-free tuning over more than 100 nm. Microsteps (< 1 pm) are visible for very only ~20 % over the whole specified tuning range High resolution spectrum of iodine measured with CTL 950 from 915 to 985 nm. The zoom shows the immense resolution. slow scan speeds. Piezo scans over > 30 GHz are possible with < 10 kHz step size. can be reduced to below 0.1 % with PowerLock. With piezo scanning more than two additional x500 zooms are possible to measure even finer features and resonances.

12 www.toptica.com www.toptica.com 13 Class 3B Laser Product EN 60825-1:2007. Visible or insible laser radiation. DLC CTL Avoid direct exposure to beam. Caution - Class 3B visible or insivisble laser Specifications radiation when open. Avoid exposure to the beam. Magnetic fields may be Continuously Tunable Laser present which may affect the operation of certain pacemakers. Continuously Tunable Lasers

Total touch, knob & remote control Specifications The CTL series lasers are operated with TOPTICA’s all digital and versatile DLC CTL 950 CTL 1050 CTL 1320 CTL 1470 CTL 1500 CTL 1550 pro diode laser controller. This ensures not only flexibility and future compatibility, Wavelength 915 - 985 nm 1020 - 1070 nm 1290 - 1350 nm 1420 - 1530 nm 1460 - 1570 nm 1530 - 1620 nm but also lowest noise and drift (digital Absolute accuracy < 100 pm < 110 pm < 130 pm < 140 pm < 150 pm < 150 pm signals do not drift) and convenient operation via touch screen, knobs and Relative accuracy < 10 pm < 10 pm < 10 pm < 10 pm < 10 pm < 10 pm remote control. Remote control of the laser operation is possible via USB and Typ linewidth (5 µs) < 10 kHz < 10 kHz < 10 kHz < 10 kHz < 10 kHz < 10 kHz TCP/IP, either with a PC graphical user Power at Max > 80 mW > 50 mW > 50 mW > 40 mW > 50 mW > 50 mW interface or by integrating the DLC pro into customers’ software via a powerful Power at Edges > 40 mW > 25 mW > 30 mW > 20 mW > 25 mW > 30 mW command language. Max. scan speed 10 nm/s 10 nm /s 10 nm/s 10 nms/s 10 nm/s 10 nm/s User interfaces Motor step size 5 pm 6 pm 7 pm 8 pm 8 pm 8 pm Two comfortable user interfaces are provided for intuitive operation and control. Micro step size (average) 0.3 pm 0.4 pm 0.5 pm 0.5 pm 0.5 pm 0.5 pm A touch screen with four additional knobs shows the most important information Piezo scan 55 GHz 45 GHz 40 GHz 35 GHz 35 GHz 35 GHz and offers direct access to all necessary Top: Average of 100 individually centered beat measurements with 50 ms sweep time each: Piezo step size < 10 kHz < 10 kHz < 5 kHz < 5 kHz < 5 kHz < 5 kHz controls. Remote control via computer/ Beat width ≈ 100 kHz. Bottom: Change of center frequency in 70 seconds: Drift < 5 MHz. ethernet is possible with the supplied * Wavelength range will be continuously expanded. Please inquire for your wavelength of choice. comprehensive and powerful PC graphical user interface.

Courtesy Kippenberg group, EPFL a Reliable – hands-off a The DLC CTL is a hands-off laser system that requires no alignment or maintenance. The cavity is optically closed and stable 1 Å 1 Å by design, usually without the necessity of readjusting movable parts for cavity optimization. e nl c If ever required, the integrated FLOW c feature (Feedback Light Optimization

Wizard) optimizes the cavity upon the touch of a button. This optimization . . . . . . . . . . . 1 µm reestablishes stable and mode-hop-free e reency H 1 µm operation across the complete tuning More than motor control: The DLC CTL digital control electronics features also all functionality of the Measurement of the CTL 950 linewidth with a The CTL is ideally suited to investigate microca- Another important application for CTLs are range. It can be performed in the field (no DLC pro for DL pro lasers, including the optional DLC pro Lock for frequency stabilization. self-heterodyne beat experiment with a 1 km vites. Such cavities are useful for sensing quantum dots. These act as artificial atoms shipping back to the factory is necessary). (5 µs) delay fiber. The result is a linewidth of applications, investigating quantum-mechanical in in solid-state systems. Unlike real atoms, Due to the excellent and innovative patent approximately 5 kHz. coupling, and to create microscopic frequency semiconductor quantum dots can be grown pending design of the CTL, activation of combs. and placed in a controlled fashion, e.g. in the FLOW will only be necessary if the photonic crystal cavities and even enable cavity QED experiments in the solid state (taken with laser has experienced large mechanical permission from Peter Lodahl et al., Reviews of shock or temperature changes. Together modern physics 87, p. 347 (2015)). with the SMILE, the CTL is a worry-less and hands-off laser system ready for use when you are.

Future ready The digital nature and the future-oriented design of DLC pro allow for easy integration of new features. Already, micro-steps and power stabilization have been added by the last firmware upgrades, and we keep adding improvements and new features continuously.

14 www.toptica.com www.toptica.com 15 DLC DL pro Ultra-Stable Tunable Diode Laser with Digital Control

The DLC DL pro unites TOPTICA’s Main advantages well-established DL pro laser head with its The main advantages of the DLC DL pro patented resonator design and the all- for the user include large mode-hop-free digital control electronics DLC pro. Owing tuning, alignment-free operation and the to its low noise and drift values, the highest acoustic and thermal stability of DLC DL pro achieves even narrower any ECDL on the market. linewidths and better stability. At the same time, the system provides This translates to a product that delivers a most convenient user interface with the most reliable and convenient operation intuitive touch, dial and total remote for high-end laboratory work. Laser system DLC DL pro with well established control. For detailed specifications of the laser head and all-digital control electronics. DLC pro, please see page 38-40. Just like Sophisticated and patented technology the first laser of the pro series, the DL pro, To achieve the highest performance demonstrated how much even a a well- and ease of use, the DL pro mechanics Key Features established instrument like the DL 100 possesses degrees of freedom exactly can be further improved, the first pro laser where they are needed. Coarse and · Available between 369 nm .. 1770 nm control electronics, the DLC pro, leads to a fine-tuning have been skillfully separated: huge improvement in performance. A well-defined rotation of the grating · All-digital, intelligent control performs coarse tuning and precisely electronics DLC pro Options selects any requested wavelength within the gain spectrum of the diode. · Power stabilization to external signal and pressure compensation included · Single and double-stage isolators Mode-hop-free tuning is realized by a (page 45) system of robust flexure joints that TUNABLE DIODE LASERS · Ultra-stable patented resonator require only tiny adjustments. They rotate design (DE 10 2007 028 499 and · Fiber-coupled output with FiberDock the laser‘s grating around the perfect US 7970024) External Cavity and DFB Diode Lasers (single-mode, polarization-maintaining) “virtual” pivot point. · Optimized virtual pivot point · DLC pro Lock, integrated digital The compact and stable external-cavity frequency stabilization (page 39) resonator has its first mechanical resonance · 20 - 50 GHz mode-hop-free tuning Tunable diode lasers have been TOPTICA’s laser (ECDL) technology. The popular diodes. It offers larger mode-hop-free · DLC ext allows to combine the DLC pro above 4 kHz - one reason for its superior core expertise since 1995, when the first DL pro has surpassed the DL 100 in the tuning ranges at reduced coarse-tuning with advanced locking modules acoustic stability. Special care has · Convenient alignment-free coarse- DL 100 lasers found their way into scientific installed base. Researches all around ranges and increased linewidth compared DigiLock 110 and FALC 110 (p. 41-43) been taken in choosing dimensions tuning from outside the laser head laboratories. Many years of continuous the world enjoy its stability and longevity to the DL pro. Due to the lack of alignment and materials with reduced sensivity to · Fast current AC & DC modulation development followed - along with from undergraduate students to Nobel sensitive optical elements, DFB pro lasers · Beam shaping (page 22) variations of the ambient temperature. thousands of individually manufactured laureates. The DL pro is the laser of choice are suited particularly for applications in In addition to its stability, the DL pro is easy Check our regularly updated diode stock list: · Motorized wavelength selection with an and customer-proven diode lasers. particularly for demanding experiments noisy environments. to align: The experienced user can even www.laser-diodes.com accuracy of approximately ± 0.2 nm that need stable locking of several lasers, With the first all-digital control electronics exchange the laser diode on-site. (for most wavelengths, page 22) Thanks to the introduction of the patented narrow linewidth (available as a special DLC pro TOPTICA has taken yet another pro technology in 2007, TOPTICA has option at many wavelengths) and easy big step in laser operation. The DLC pro consolidated and enlarged its market tuning. The DFB pro is TOPTICA’s new sets new standards with respect to leadership in external-cavity diode tunable laser incorporating DFB or DBR noise figures, stability values and user friendliness. New features become available such as the power stabilization po 32 with updates of the software, even for a at it oia iap 20 po at 780.2128 C] systems already in operation in the a iwit 30

16 ] laboratories worldwide. 780.2126 . 28 pp. 12 equency of 780.2124 Drift approx. All lasers of the pro series may now be ΔT=10 K 26 . 300 MHz velength [nm 780.2122 driven with the DLC pro and hence opera- 8

Wa 24 ted not with its intuitive touch screen and at ia a.. 780.2120 conventional ECDLs 4 Resonance fr 22

control computer using the provided Fr 0 20 1 23456 2 46810 software or the powerful command ti Excitation frequency [kHz] Time [h] language. The laser control electronics Laser frequency response to a 10 Kelvin air has successfully arrived in the digital age Measured beat signal of two free-running DL pro DL pro piezo transfer function. Below 4 kHz no at 1160 nm. 100 scans with sweep times of acoustic resonances can be detected. temperature change (laser and electronics . and the DLC pro outperforms its analog 50 ms have been averaged. The two laser inside a climate chamber). counterpart SYST DC 110 system, which systems are of the same built and contribute elen n remains available as economic solution. equally to the residual noise.

16 www.toptica.com www.toptica.com 17 DLC DL pro HP TOPSellers DLC DL pro and DLC DL pro HP Higher Power from Tunable Diode Lasers Wavelengths and Specifications

Due to new laser diode developments, the 50 GHz. Typical short term linewidths are The DLC DL pro is used in various maximum single-frequency output power below 150 kHz, corresponding to co- H applications and it is designed to be of visible and UV tunable diode lasers is herence lengths of > 600 m. Standard DLC 2 x Lyman α used with various laser diodes. TOPTICA no longer limited by the damage threshold wavelengths include 399 nm, 423 nm is in close contact with researchers to of the laser diode. However, achieving re- and 633 nm. Other wavelengths between identify and meet the specific needs. liable single-frequency operation of an ex- 394 nm and 640 nm are available on re- Some applications are in fact so popu- ternal cavity diode laser (ECDL) becomes quest. See preconfigured TOPSeller on lar that we have defined laser systems increasingly difficult at high power levels. the next page. Li Be specific to them. For example the most DLC Lithium cooling DLC Be+ cooling popular application of the DL pro is the DLC TA pro 670 Small variations of the laser diode current Integrated optical isolator DLC DL pro 670 laser cooling of rubidium, in which the DL pro HP laser head. or its temperature can cause mode-hop- The DL pro HP laser head features two in- laser wavelength is tuned very close to ping - which corresponds to an abrupt puts with protection circuit for fast AC & the Rb D1 line at 780.24 nm. jump in laser frequency by several GHz - DC modulation of the laser diode current. Na Mg Key Features or even lead to multi-mode operation of These are typically used for fast frequen- The ten TOPSellers of the DLC DL pro DLC Sodium cooling DLC Mg+ cooling · Available between 394 nm .. 640 nm the laser. cy modulation or locking. A preselected and DLC DL pro HP are direct solutions 35 dB optical isolator is also integrated. for the most popular applications. They · Up to 110 mW single-frequency, Higher power from visible & UV ECDLs The DLC pro digital electronics (see page are configured just in the way they are tunable output The new DLC DL pro HP diode laser 38-40) allows convenient operation via required for the immediate integration to overrides former output power limits of touch screen and remote control. K Ca the lab. The fitting laser diode and op- · Excellent stability against ECDLs in two ways. First, it features a DLC TA pro 765 DLC Ca+ cooling tical isolator are included. This allows mode-hopping specific version of the DL pro laser head DLC DL pro 780 DLC DL pro 850 for shorter delivery times of a few weeks DLC DL pro HP 420 with a proprietary resonator design and DLC DL pro HP 397 and, due so simplification in the produc- · Typical linewidth 100 .. 500 kHz Options DLC DL pro 850 provides increased single-mode power at tion process, for reduced prices relative „visible“ wavelengths. Second, the new to the configurable systems. · For details of the laser controler · Fiber-coupled output with FiberDock digital driving electronics DLC pro enab- Rb Sr Pr DLC pro see page 38-40. (single-mode, polarization-maintaining) les unmatched current and temperature DLC Ryberg Rb I DLC Sr cooling DLC Pr Storage DLC Ryberg Rb II DLC DL pro 461 HP Check our regularly updated diode stock list: stability. The combination of both achie- · DLC pro Lock, integrated digital DLC TA pro 780 DLC DL pro 670 www.laser-diodes.com DLC TA pro 795 DLC DL pro HP 420 vements delivers record values of stab- frequency stabilization (p. 39) DLC DL pro 780 le single-frequency output power from DLC DL pro HP 420 visible or UV ECDLs, for example 110 mW · DLC ext allows to combine the DLC at 399 nm or 461 nm. pro with advanced locking modules Cs Ba Yb Dy Hg DigiLock 110 and FALC 110 (p. 41/42) DLC TA pro 850 DLC Yb cooling DLC Dy cooling DLC Mercury Cooling DLC DL pro 850 DLC Yb+ cooling Coarse- and fine-tuning DLC DL pro HP 461 DLC DL pro 369 · Beam shaping DLC DL pro HP 637 Manual coarse tuning of the wavelength is possible across the full gain spectrum · Motorized wavelength selection with an of the laser diode (for blue and UV diodes accuracy of approximately ± 0.2 nm approximately 2-3 nm) and mode-hop- A number of TOPSeller systems are available, e.g. for laser cooling or excitation of specific Magneto-optical trap of rubidium atoms. free fine-tuning covers scan ranges up to transitions. Listed in this cut-out of the periodic table are all TOPTICA TOPSeller solutions for I. Bloch, MPQ Garching, Germany. each element. Direct diode lasers are marked in bold letters. TOPSellers based on amplified TA solutions (see page 26) or frequency-converted NLO systems (see page 34) are mentioned for completeness.

DLC DL pro 850 780 670 633 369 100 DL pro HP Cs cooling, Rb cooling and repump, Li cooling and repump, DL pro / DL 100 Typical applications HeNe laser wavelength Yb ion cooling Ca ion repump K cooling and repump Sr ion clock transition Peak power (mW) behind 70 105 25 32 13 isolator, specified (typical) Wavelength (nm) 840 - 875 765 - 805 664 - 674 631 - 635 369.2 - 370.2 Linewidth (kHz @5 µs delay) 100 100 200 200 100 10 Included optical isolator > 60 dB > 60 dB > 60 dB > 60 dB > 28 dB Poer DLC DL pro HP 637 461 420 399 397

Power [mW] NV center, Ca cooling, Sr ion Typical applications Sr cooling, Cs Rydberg Yb cooling Ca ion cooling Yb ion clear out laser cooling, Rb Rydberg Peak power (mW) behind 45 (50) 110 70 50 65 isolator, specified (typical) Wavelength (nm) 635 - 639 457 - 461 420 - 423 399 - 402 396.5 - 398.5 1 Linewidth (kHz @5 µs delay) 500 150 150 150 150 360 380 400 420 440 460 480 500 520 540 560 580 600 620 640 Included optical isolator > 35 dB > 35 dB > 35 dB > 35 dB > 35 dB Wavelengthelen [nm] n

18 www.toptica.com www.toptica.com 19 DFB pro SYST DL 100 Distributed-Feedback Lasers Conventional and Economic Tunable Diode Lasers

High stability & ease of use itself to applications that require wide, Principle of operation Modular design Distributed feedback (DFB) and Distri- continuous scans, such as molecular The well-proven performance of the The DL 100 diode laser head comprises a buted Bragg-reflector (DBR) lasers unite spectroscopy, gas sensing, or the genera- DL 100 results from its Littrow-type mounting base which serves as heat sink, wide tunability and high output power. tion of continuous-wave terahertz waves. external cavity laser setup in a simple but a temperature sensor and Peltier cooling The frequency-selective element, a Bragg rugged design. All over the world, scien- element for active temperature control, a grating, is integrated into the active By contrast, laser-current tuning spans a tists and engineers use the DL 100 for laser base plate, a laser diode holder with section of the semiconductor and ensures smaller frequency range, but works up to numerous experiments, from simple ab- a collimator and a grating mount with a continuous single-frequency operation. MHz rates. The electric tuning coefficient sorption spectroscopy to multi-species piezo actuator for precise tuning. Due to the absence of alignment-sensitive usually amounts to 1-10 GHz/mA. Electric BECs. components, DFB lasers exhibit an excep- tuning thus enables fast and highly precise The laser diode itself can be easily exchan- DFB pro laser heads. SYST DL 100, the classic workhorse for many Left to right: Compact DFB pro, DFB pro BFY tional stability and reliability. The lasers scans, as required for atomic physics or Fine thread screws permit coarse ma- ged by replacing the diode holder without quantum optics experiments. (for butterfly diodes) and DFB pro L (for comple- work under the most adverse environ- phase-shifting interferometry. nual tuning, while precise mode-hop-free dismantling the setup. The DL 100 is availa- te range of options). mental conditions – even in the Arctic or in scans are driven by a piezo actuator. ble with AR and FP-type diodes. FP diodes airborne experiments. Touch-panel control Lockable, three-dimensional adjustments deliver higher power at lower cost, while Key Features The new DFB pro lasers are conve- together with metal flexures provide rigid AR-coated diodes offer wider tuning, more Key Features Three laser heads niently controlled with the DLC pro. All control of both the laser beam collimation stable single-mode behavior and narrower · Widest wavelength coverage The new DFB pro laser series integrates of the popular features of the DLC pro and the grating feedback. The laser reso- linewidths. The control and supply units are 370 .. 1770 nm · Single-frequency lasers with both DFB and DBR diodes. Three laser are supported: the user-friendly touch dis- nator is thermally stabilized by means of a designed as modular plugins which can be distributed-feedback diodes heads accommodate different diode play, remote control via Ethernet, “click Peltier cooling element, connected to the combined to meet any application require- · High power up to 300 mW packages: the compact DFB pro and its and lock” operation. In addition, users can DTC 110 Diode Temperature Control. ment. Further modules like Scan Control, · Available wavelengths: “big brother” DFB pro L integrate 9 mm or choose between a “wide scan”, which PID regulator and Pound-Drever-Hall detec- 633 nm, 760 nm .. 3500 nm · Mode-hop-free tuning up to 30 GHz TO3-type diodes. The DFB pro BFY offers changes the laser temperature in a Low noise operation of the DL 100 is tor complete the modular electronics setup. · Mode-hop-free tuning range: a dedicated laser head for butterfly-type well-controlled manner, and a fast scan achieved by means of the Diode Current · Free-running linewidth Up to 1400 GHz diodes. that acts on the laser current. Control DCC 110. In addition, TOPTICA Hands-on setup 100 kHz .. 1 MHz (5 µs) offers a variety of regulator modules to The DL 100 has evolved in research labo- · Up to 150 mW output power Available wavelengths include 633 nm and Laser frequency control has never been stabilize the laser frequency. ratories and therefore offers the necessary · AR and FP diodes the entire range from 760 nm to 3500 nm. that easy! versatility for a changing environment. For · Reliable operation even in harsh instance, all important alignment parameters environments Check our regularly updated diode stock list: Thermal and electric frequency tuning Options Options are easily accessible from above and are ad- www.laser-diodes.com Frequency tuning of DFB/DBR lasers is justable by lockable fine threadscrews. If an · 3 different laser heads – wide range accomplished by varying either the chip · Beam shaping · Optical isolators OEM application requires a fixed laser setup of options temperature or the operating current. with limited user access, TOPTICA can also · Single-stage or double-stage optical isolation · Beam shaping Check our regularly updated diode stock list: Typical thermal tuning coefficients are provide “hands-off” laser systems. www.laser-diodes.com ~25 GHz/K at 780 nm and ~10 GHz/K at · Fiber coupling · Fiber-coupling 1.5 µm. Thermal tuning achieves mode- Reasonably priced hop-free scan ranges of several hund- · Frequency stabilization option DLC pro Lock · DC / AC coupled modulation board A DL 100 laser system is the most eco- red GHz, at a moderate tuning speed of (see page 39) nomic and flexible step into the “World of ~100 GHz/s. This tuning mode lends · Locking modules for SYS DC 110: Tunable Diode Lasers”. If even more stable and convenient operation is required, · DigiLock 110, FALC 110, the DL pro systems are the recommended PID 110, PDD 110 alternatives (see pages 17-19).

Relative Detuning (GHz) 6.0 nose 10 H 10 H 001 . . . 5.5 ∆λ . m 5.0 ∆ν . 4.5 . . 4.0 . . RIN (dBc/Hz) 3.5 Transmission (a.u.) Wavelength (nm) e snl ransmission (a.u.) 3.0 . T onose l . . 2.5 2.0 Frequency (Hz) Time (s) Laser Diode Temperature (C) . . . . . 10 15 20 25 reency H Wavelength Scan (GHz) “Wide scan” of a DFB pro laser at 780 nm: Absorption spectrum of iodine, recorded with a Relative intensity noise (RIN) of a DFB pro laser Linewidth measurement of DL 100 with delayed DL 100 frequency sweep over four Rb absorption A temperature sweep from 3 °C to 30 °C thermally tuned DFB pro laser at 633 nm. The scan at 780 nm. The integrated RMS noise amounts self-heterodyne beat setup (delay 5 µs). The lines (red). FPI transmission peaks (blue, changes the frequency by 700 GHz. in the figure covers a range of approx. 250 GHz. to 0.01%. resulting linewidth is below 100 kHz. FSR 1 GHz) are shown for reference.

20 www.toptica.com www.toptica.com 21 Class 3B Laser Product EN 60825-1:2007. Visible or insible laser radiation. Options Tunable Diode Lasers Avoid direct exposure to beam. Caution - Class 3B visible or insivisble laser Specifications radiation when open. Avoid exposure to the beam. Magnetic fields may be DL Series Laser Head Options present which may affect the operation of certain pacemakers. Tunable Diode Lasers

A number of options allow to optimize the Specifications laser system towards the specific needs . ma cacat DL pro DL pro HP DL 100 DFB pro of the application. While our TOPSeller . provide pre-configured solutions to a num- Type of laser ECDL ECDL ECDL Direct diode ber of applications, the DLC DL pro and AR coated and AR coated and AR coated and DFB and e snl Laser diodes DLC DL pro HP systems is customizable FP laser diodes FP laser diodes FP laser diodes DBR diodes high resolution, flexible economic rugged environments, with the following options: Best for high power long term operation lab system wide continuous tuning reency H Typical linewidth (5 µs) 10 kHz .. 300 kHz 100 kHz .. 500 kHz 30 kHz .. 300 kHz 300 kHz .. 2 MHz Self-heterodyne linewidth measurement of DL pro with integrated optical isolator and fiber DLC DL pro with narrow linewidth option. coupling using a FiberDock Wavelength range 369 nm -1770 nm 394 nm - 637 nm 369 nm - 1770 nm 633 nm, 760 nm - 3500 nm mechanical Coarse Tuning mechanical* mechanical* thermal or electric (service operation) Mode-hop-free tuning-range (MHFTR) 20 GHz .. 50 GHz 20 GHz .. 50 GHz 20 GHz .. 50 GHz 600 .. 1200 GHz Narrow linewidth Temperature sensitity << 100 MHz / K << 100 MHz / K 400 MHz / K 100 MHz / K optional, Optical isolator included optional + recommended optional + recommended With this option DL pro laser systems are optimized for narrow linewidths. It is also suited for seed lasers included in TOPSellers of TA pro or NLO systems but not for DL pro HP, DFB pro or DL 100 lasers. Replacement of laser diodes possible at the factory easy at the factory Wavelength switch available not available available available Fiber Coupling (FiberDock) DLC DFB pro, Laser system with DLC pro DLC DL pro DLC DL pro HP not available DLC DFB pro L, DLC DFB pro BFY TOPTICA’s patented fiber coupler provides highest single-mode fiber-coupling efficiencies, easy alignment and at the same time highest stability. TOPTICA additionally offers a wide range of single-mode and DFB pro (L / BFY) and Laser system with SYS DC 110 SYST DL pro not recommended SYST DL L polarization-maintaining fibers, including fiber-optic beam splitters. Optical isolation is mandatory for fiber- SYS DC 110 coupled diode laser systems. This option is also available for TOPSeller DLC DL pro and DLC DL pro HP. Specifications are typical values and can vary with integrated laser diode. Please see laser diode stock list for details or inquire: www.laser-diodes.com. Optical Isolation *Motorization available, see page 22. Isolators are used to protect the laser diode against back reflections. This not only prevents damage to the diode but also ensures untroubled tuning and single-frequency operation. Fiber-coupling with angle- polished fibers (both ends) requires at least a single-stage isolator (> 30 dB). Double-stage isolators are needed if reflections from the experiment into the laser are expected. Fiber-coupling with non-angle-polished How to choose your DL series configuration fibers also requires a double-stage isolator (> 60 dB). TOPSellers are always equipped with the appropriate optical isolator. See page 45 for details of the isolators. Beam Shaping

You need a laser system Configure system, To shape elliptical laser beams into round profiles, either an anamorphic prism pair (APP) or cylindrical lenses Is there a TOPSeller Order · for the application _____ possibly with fiber are used. The compressed circular beam is small enough for using inexpensive small-aperture isolators, and available (see pages no customized system. the fiber-coupling efficiency is enhanced by approximately 10 %. The compression ratio is set at the factory. · at wavelength _____ nm. 19, 26, 34)? coupling (FiberDock).

The motorization of the coarse tuning offers manual control and operation via software interface. This option is yes available for most DL pro laser systems (most AR laser diodes and some FP diodes) including DL pro HP laser systems. Please note that unlike for the DLC CTL systems (p. 12) mode-hopping during the scan may occure. This leads to an approximate accuracy and repeatability specification of ±0.2 nm of the laser wavelength. Not available for the DL 100 or for DFB pro. yes

The DL pro (HP) has two modulation inputs that allow current modulation frequencies of up to 150 MHz. A Do you need Add FiberDock Bias-T allows even higher current modulation frequencies of up to several GHz, depending on the diode. It is fiber coupling? yes and fiber. also suited for seed lasers of TA or NLO systems. DL 100 laser have a Bias-T included that may be activated by setting of a jumper.

Do you Electronics Modules need any no of the options Order TOPSeller for motorization, bias-T no best price and shorter delivery time. A broad variety of electronic locking modules is available for frequency stabilization. or beam shaping See pages 41-43 for details of the modules like DigiLock 110 and FALC 110 etc. (p.22)?

22 www.toptica.com www.toptica.com 23 TA pro The complete high power laser system in pro technology

Integrated system with changes. The TA pro is easy to align, high-quality components very stable when aligned, and it offers The TA pro consists of a grating-stabilized the best possible beam quality available diode laser and a tapered semiconductor from tapered amplifiers. The TA pro comes amplifier. A high-quality optical isolator in five standard wavelengths, but further placed between master laser and wavelengths between 632 nm and amplifier eliminates spurious back- 1495 nm are available as well. The output reflections and thus guarantees spectrally power at a specific wavelength depends robust operation. on available TA chips and master laser diodes. Thanks to a new high-current laser DLC TA pro - next generation of amplified tun- Between isolator and tapered amplifier driver, the most powerful TA pro systems able diode lasers - with the all digital DLC pro a probe beam is tapped off and made now achieve power levels up to 3.5 W. driving electronics. available for spectral stabilization and monitoring purposes. All mechanical and Prepared for high bandwidth locking optical components are integrated in a The TA pro system is ideally prepared for · Gain up to Key20 dB Features (x 100) housing that is machined from one solid high bandwidth power and frequency sta- block. The complete system has proven bilization as well as linewidth reduction by · MOPA concept with DL pro master its stability in numerous tests both in acting on the laser and/or amplifier current and tapered amplifier TOPTICA’s laboratories and in many through several high bandwidth modula- customers’ experiments. tion inputs. TOPTICA offers various solu- · Powers up to 3.5 W tions for stabilization tasks, e.g. Pound- Active power stabilization included Drever-Hall or phase locking. · Amplifier currents up to 5 A / 10 A HIGH POWER DLC TA pro systems feature integrated photo diodes that monitor the seed and DLC TA pro systems come with TOPTICA’s · Excellent beam quality: typ. M² < 1.5 output powers to prevent damage to and all digital DLC pro. It delivers lowest drift Tunable Laser and Amplifier Systems in the Watt Regime premature aging of the amplifier chip. and noise and at the same time highest · DC & AC-coupled modulation ports With the free DLC pro firmware update to amplifer currents: 5 A with CC-5000 and for both master laser and amplifier version 1.4 or higher we have added ac- with the optional surcharge SUR TA / HP tive power stabilization. Not only can the up to 10 A. DLC pro is conveniently cont- · Probe-beam output Single-mode diode lasers often do not meet output power (TA pro) as well as amplifier amplifier. The Master-Oscillator Power- power be stabilized at the integrated rolled via touch display, knobs or remotely the power requirements of applications. only solutions (BoosTA pro). Both offer Amplifier (MOPA) concept combines the photo diodes, but also on external photo via TCP/IP or USB. More information on · Output power stabilization With tapered amplifiers (TAs, see page power levels up to 3.5 W, while the BoosTA tunability and linewidth of the DL pro seed diodes in your experiment – exactly where DLC pro can be found on pages 39 & 40. 11) the power can easily increase to the is the most cost efficient solution providing laser with the high power and excellent you need it. Alternatively, the TA pro is still availab- Check our regularly updated diode and TA chip stock list: www.laser-diodes.com Watt level without impairing the spectral up to 1.5 W output power. beam quality available from tapered le with TOPTICA’s proven analog elec- quality of the seed laser. Besides, TAs offer amplifiers. Master oscillator and power Key advantages tronics SYS DC 110 as SYST TA pro. excellent beam quality (M² < 1.5 or 2). The TA pro is a member of TOPTICA’s pro amplifier are independently driven by a The integrated MOPA (Master-Oscillator series and consistently follows the concept pair of temperature and current controllers. Power-Amplifier) system provides Please inquire. TOPTICA offers complete and integrated of maximum stability and ease of use. This Patented, highly stable, flexure based unmatched stability against acoustic noise, Master Oscillator Power Amplifier (MOPA) product consists of a grating stabilized mirror mounts ensure easy coupling of vibrations and ambient temperature systems with stable beam pointing and diode laser and a tapered semiconductor the master laser into the tapered amplifier and prevent intensity fluctuations caused pro / oos pro by beam pointing variations. For beam shaping, TOPTICA uses custom-made oos Optical isolator optical components, achieving an excellent Ultra-stable mirror 60 dB mount otpt pow wit owoc beam profile and highest single-mode DL pro as fiber-coupling efficiencies. master oscillator

management . and drift (narrow linewidth) and the most . σ . convenient user interfaces. SYST TA pro is the more cost efficient alternative Optical isolator 60 dB im o io ota with analog double stage SYS DC series TA pro laser head with integrated 60 dB Excellent output power stability (example of DLC TA pro system master and amplifier electronics. output isolator. testing a new chip at two different amplifier powers with PowerLock during a 10 Hz piezo currents). scan. While the master fluctuates approx. 8%, elen n the TA output is stable (σ=0,01%).

24 www.toptica.com www.toptica.com 25 TA pro TOPSeller and Customized Versions BoosTA pro Optimized Systems for Selected Applications Semiconductor Optical Amplifier in pro Technology

Optimized Systems for Selected Options For customers who wish to boost A compact, external power supply (DC HP) Applications the power of existing lasers, coherent drives the amplifier head and allows effort- Pre-configured TA pro systems have · Optical isolator for TA output stand-alone amplifiers offer an attractive less operation - even of current-hungry proven themselves as workhorses in (recommended) solution. TA chips at wavelengths with lower gain. numerous quantum optics laboratories Researchers thus benefit from output around the world. TOPTICA’s TA pro · Surcharge SUR TA / HP for higher TOPTICA’s BoosTA product line provides power levels up to 3.5 W with currents currents (DLC pro: 10 A, SYST: 5 A) TOPSellers are value priced and can be efficient optical amplification without up to 7 A. H combined with multiple options. Optical · Fiber-coupling of TA output and/or compromising the high spectral and Isolation of the output beam is highly spatial beam quality of the master laser. The BoosTA pro head also includes a DLC 2 x Lyman α probe beam (output FiberDock requires recommended. high-bandwidth current modulation board, optical isolation) BoosTA pro — High-power optical amplifier. Semiconductor optical amplifier for which - when used in a closed feedback Customized Solutions · Narrow linewidth resonator more laser power loop - allows compensating power fluc- Based on more than 30 different TA-Chips TOPTICA’s new stand-alone optical ampli- tuations of the master laser by adjusting Li Be a very broad range of wavelengths and · DFB master laser fier BoosTA pro increases the output the amplifier gain. The board features a Key Features DLC Lithium cooling DLC Be+ cooling powers can be realized with customized power of a DL pro or any other linearly protective circuit to avoid the risk of chip DLC TA pro 670 · Motorized wavelength selection DLC DL pro 670 versions of TA pro systems (graph on page polarized master laser by up to 20 dB. damage. The beam management of the · Compact amplifier module 24, see also tapered amplifier stock list · Bias-T for high bandwidth frequency seed laser can be greatly simplified by at www.toptica.com/laser diodes). They modulation Following TOPTICA’s well-established fiber input coupling, which is optionally · Gain up to 20 dB (x 100) Na Mg are open and flexible systems, and can pro-technology, the TA chip is mounted available as well as fiber-output cou- be modified according to individual needs · Locking option DLC pro Lock and in a compact unit with optimized heat pling. Optical output isolation is provided · Output power up to 3.5 W DLC Sodium cooling DLC Mg+ cooling (see options). In case you don’t find your DigiLock 110, PDD 110, FALC 110, etc. management and beam-shaping optics. by TOPTICA. The BoosTA pro head has preferred features please don’t hesitate sufficient space for a 60 dB isolator to · Amplifier currents up to 7 A to contact us. We are happy to discuss protect the TA chip from back reflections. your individual needs and are prepared to Options · External control electronics (DC HP) K Ca create flexible solutions. There are many To determine the available tuning ran- more possibilities not listed here. · Optical output isolator, 30 or 60 dB ge and output power for your desired DLC TA pro 765 DLC Ca+ cooling · Maintains spectral properties of DLC DL pro 780 DLC DL pro 850 (integrated in amplifier head) wavelength, please contact TOPTICA. master oscillator DLC DL pro HP 420 DLC DL pro HP 397 For an overview, please see the table on DLC DL pro 850 · Fiber-coupled input page 28, the graph on page 24 and check · Many wavelengths available our regularly updated tapered amplifier · Fiber-coupled output (660 .. 1495 nm) stock list on www.laser-diodes.com. The Rb Sr Pr (requires optical isolation) DLC Ryberg Rb I DLC Sr cooling DLC Pr Storage stock list shows the required amplifer Check our regularly updated TA chip stock list: DLC Ryberg Rb II DLC DL pro 461 HP www.laser-diodes.com DLC TA pro 780 DLC DL pro 670 · Operation with standard rack current for achieving the maximum spe- DLC TA pro 795 DLC DL pro HP 420 DLC DL pro 780 Magneto-optical trap of lithium atoms. SYS DC 110 cified output power. BoosTA pro offers a DLC DL pro HP 420 T. Esslinger, ETH Zürich, Switzerland. maximum current of 7 A. Cs Ba Yb Dy Hg DLC TA pro 850 DLC Yb cooling DLC Dy cooling DLC Mercury Cooling DLC DL pro 850 DLC Yb+ cooling DLC DL pro HP 461 DLC DL pro 369 DLC DL pro HP 637

A number of TOPSeller systems are available, e.g. for laser cooling or excitation of specific transitions. Listed in this cut-out of the periodic table are all TOPTICA TOPSeller solutions for each element. Amplified diode lasers are marked in bold letters. TOPSellers based on direct diode lasers (see page 19) or frequency-converted NLO systems (see page 34) are mentioned for completeness.

Beam quality [M²] < 1.5 < 1.5 < 2 < 2 < 2 BoosTA pro with DC HP. BoosTA pro laser head with Fiber-in, Fiber-out (FiFo). Mode-hop-free tuning [GHz] 30 - 50 30 - 50 30 - 50 30 - 50 30 - 50

26 www.toptica.com www.toptica.com 27 Class 4 Laser Product EN 60825-1:2007. Visible or insible laser radiation. BoosTA Avoid eye or skin exposure to direct or scattered radiation. Caution - Class Specifications 4 visible and/or insivisble laser radiation when open. Avoid exposure to the beam, avoid eye or skin exposure to direct or scattered radiation. Magnetic Semiconductor Optical Amplifier fields may be present which may affect the operation of certain pacemakers. High power laser and amplifier systems

Compact and cost efficient semicon- table and increases the long-term Specifications ductor optical amplifier stability of the experimental set-up. For customers with moderate power It is even possible to combine two DLC TA pro BoosTA pro BoosTA requirements, the BoosTA offers a cost different seed lasers, e.g. in a polarization- Configuration MOPA Amplifier efficient alternative to the BoosTA pro maintaining fiber array, and amplify both DL pro (integrated), DL DFB on while still being superior to self-built wavelengths simultaneously in a single Master laser External request solutions. It comes pre-aligned and tested BoosTA system. This concept is widely with a suitable seed laser, and users can used for the generation of tunable, Wavelengths 660 .. 1495 nm* readily insert it into their experimental continuous-wave terahertz radiation. Max. power 3.5 W 1.5 W set-up. BoosTA — Economic optical amplifier. Available BoosTA power levels depend Coarse tuning 10 .. 50 nm The BoosTA comprises a selected tape- on the particular TA chip and the availab- Typical mode-hop-free tuning 20 - 50 GHz Depends on master laser red amplifier chip as well as proprietary le current. The BoosTA offers a maximum Typical linewidth (5 µs) 10 kHz .. 300 kHz Depends on master laser Key Features collimation optics, which help to achieve current of 2.5 A - sufficient for output the best possible output beam profile. powers up to 1.5 W. Polarization Linear > 100 : 1 · Compact amplifier module Control electronics for TA chip tempera- ASE background, typ. < -40 dB Depends on master laser ture and driver current is integrated into The table below lists common wa- · Gain up to 20 dB (x 100) < 1.5 (< 2.0 for some higher- the laser head. The current can either be velengths and available powers from Beam quality M² < 1.5 (< 2.0 for some higher-power chips)** power chips) set manually via a rotary potentiometer, BoosTA and BoosTA pro with typical · Output power up to 1.5 W or remotely via an RS 232 interface. required amplifier currents. Divergence < 1 mrad An external power supply minimizes the Beam height 50 ± 1 mm 53.9 mm · Amplifier currents up to 2.5 A impact of thermal and electronic radiation Options Internal: 60 dB included, Output: (EMC) on the amplifier head. Optical isolators Input: none, Output: optional 30 or 60 dB · Integrated, compact control electronics optional 30 or 60 dB Fiber input and output coupling as well · Optical output isolator, 30 or 60 dB Fiber-coupling Output and probe beam: optional Input*** and Output: optional (integrated into amplifier head) · Maintains spectral properties of as integration of an optical output iso- Fiber-coupling efficiency****: min. (typ.) 50 % (60 %) 50 % (60 %)** master oscillator lator in the amplifier head are optio- · Fiber-coupled input nally available like for the BoosTA pro. Monitor photo diodes For seed and output - · Many wavelengths available The fiber-coupled system provides high · Fiber-coupled output Intensity modulation option TA-Mod included - (660 .. 1495 nm) flexibility in the optical beam path, (requires optical isolation) reduces complexity on the optical Control electronics DLC pro, digital DC HP Integrated + power supply Check our regularly updated TA chip stock list: www.laser-diodes.com Maximum TA current (HP) 5 A (10 A) 7 A 2.5 A Frequency modulation option Included -

BoosTA vs. BoosTA pro - Power at selected wavelengths Locking options DLC pro Lock, DLC ext Depends on master laser Wavelength [nm] 670 735 765 780 795 850 915 970 1010 1060 1100..1360 1480 Environment temperature / humidity operating: 15 - 30 °C, transport: 0 - 40 °C / Non condensing Max. Power [W] BoosTA pro 0.5 0.5 2 3 3.5 3 1.5 3 2 2 1.5 0.3 Operating voltage 100 - 120 V / 220 - 240 V AC, 50 - 60 Hz (auto detect) Max. Power [W] BoosTA 0.5 0.5 1.3 1.5 1.2 1.3 1.2 0.75 - 1 - 0.25 Power consumption Typ. 70 W Typ. 40 W Typ. 35 W Max. required Current [A] 1.1 1.5 3 4 4 5 3 5 5 4 7 3 Size head (H x W x D) 90 x 192 x 400 mm³ 90 x 115 x 275 mm³ 85 x 100 x 312 mm³

Size electronics (H x W x D) 154 x 450 x 348 mm³ 85 x 105 x 200 mm³ 70 x 175 x 179 mm³

Weight head / electronics 9.5 kg / 8.5 kg 3.9 kg / 2.3 kg 4.5 kg / 2.4 kg 2250 mA 2200 mA *With gaps **With TOPTICA master laser ***Requires PM fiber FC/APC ****With TOPTICA’s FiberDock, isolation required. 1000 1750 mA 800

200 750 mA Typical saturation behavior of tapered amplifier 500 mA chips at different amplifier currents (seed power 0 250 mA levels exceeding 40 mW are not recommended). 0204060 Seed power (mW)

28 www.toptica.com www.toptica.com 29 Diode laser advantages PowerLock FiberMon, so the user has both optimiz- The diode laser systems are most compact During their experimental runs, many ation and stabilization of the fiber output in size, extremely reliable, conveniently of our users rely on constant output at hand. Consequently, you get the best operated, with low running costs and power. The excellent stability of our fiber pigtailed SHG system ever! available without water cooling. current systems was improved further with PowerLock. Residual power excursions Convenience & precision Based on almost 20 years of experience are cancelled automatically by controlling The DLC pro control rack allows for full in building frequency converted diode la- the TA power. Users benefit from stable stand-off remote control and operation of ser systems, and several hundreds of units SHG output powers, without having to the laser system. For working in the lab, installed in the field, TOPTICA’s frequency- compensate for drifts externally. the touch display allows direct control. converted lasers are now entering an un- For independent and remote control, a precedented level of stability, functionality Fiber Mon computer interface provides full access to and performance. They go digital! With the FiberMon option, one can directly all laser parameters. Just switch on your monitor the optical power coupled to laser and start the experiment! SUV the SHG output fiber. AutoAlign and The Super-UV functionality is a major Power-Lock are ready to be used with Furthermore, the users benefit from our technological leap, significantly boosting lowest-noise digital control electro- output powers and lifetimes of DUV la- nics. Since the master laser is based on sers. The redesign of the FHG stage inclu- TOPTICA’s DL pro technology, narrowest des complete sealing of the DUV optics, linewidths are routinely achieved, and developed exclusively for DLC pro- sensitivity to environmental perturbations controlled systems. The option includes is minimized to an extreme level. a lifetime warranty, and the projected total lifetime exceeds 10,000 hours. Features · SUV: Unprecedented DUV power and AutoAlign lifetime In the past, the sturdy design of TOPTICA’s frequency-converted lasers has set stan- · AutoAlign option: Hands-off coupling dards in the entire field. Today, using digital into TA, doubling cavity and fiber (with FREQUENCY-CONVERTED LASERS electronics, we push even further. Thanks FiberMon) to the AutoAlign option, the time-consu- · PowerLock for applications demanding Tunable Diode Lasers for Visible and UV Wavelengths ming task of laser system realignment constant powers during longterm operation belongs to the past. With built-in intelligence and servo-controlled flexure mirror · FiberMon: Measure, control and optimize mounts, the system optimizes the cou- your fiber-coupled laser! With AutoAlign, the user starts optimization pling of the beams into TA and SHG cavity, Standard systems and customized Super-UV option allow for the easiest pro philosophy in frequency-converted of the beam alignment with one simple click. · Every system customized with respect to and even the output fiber. Optimize your Built-in servos and digital intelligence do the experimental needs solutions possible operation. systems SHG power with one simple click! rest of the job. By combining comprehension of diode The laser head of TOPTICA’s pro design laser technology and extensive experience Together with our customers, TOPTICA’s lasers is machined from one solid in frequency conversion, TOPTICA’s lasers experts will identify the best product and metal block for enhanced robustness achieve the highest output power levels tailor it according to specific requirements against vibrations, acoustic noise and Top left: SUV long-term output power stability and the best performance on the market. in terms of output power, wavelength and temperature fluctuations. Integrated measurements for a selection of wavelengths Frequency converted lasers are available tunability. For dedicated applications, flexure-based mirror mounts provide an and output power levels, with a projected at wavelengths between 205 nm and we provide pre-configured TOPSeller unmatched long-term stability. The “bow- m lifetime exceeding 10,000 hours. 213 nm m 680 nm, with only few spectral gaps, and systems. But if our standard product tie” resonator SHG pro comes in a closed m (266 nm) measurements are shown with PowerLock on (Off).

special solutions down to 190 nm. Novel families do not match your needs, we will design with entrance and exit windows, . ons developments like the digital controller go one step further - do not hesitate to and can be adjusted without opening the Top right: AutoAlign performance after intentio- Poer DLC pro, AutoAlign functionality, or the challenge us! cover lid, allowing for a typical residual nal misalignment, showing a residual scattering -5 leak rate at the 10 mbar l /s level. at the per mille level. H pro / H pro H pro The SHG wavelength is tuned by altering . . . . . . DLH pro e H op poer DLH pro the fundamental laser color. Mode-hop- pon free tuning of tens of gigahertz is realized by scanning the fundamental laser while 0 1212 nm Linewidth: Bottom left: RIN benefit from the EOM option in the SHG resonator follows automatically. FHG stage with/without EOM 606 nm Linewidth: -10 7.6 kHz 4.9 kHz the DLC TA-FHG pro. Integrated RIN of the FHG Coarse tuning over several nanometers SHG stage with/without EOM -20 light RIN is 0.09% (0.23% without EOM), and

Poer wavelength of the fundamental laser. -40 Only if phase matching has to be Bottom right: Owing to the superior noise performance of our new DLC pro electronics, we optimized a realignment of the SHG -50

. Self-Heterodyne Spectrum [a.u.] -70 -80 77 78 79 80 81 82 83 elen n reency H Frequency [MHz]

30 www.toptica.com www.toptica.com 31 DLC TA-SHG pro DLC TA-FHG pro Frequency-Doubled High-Power Diode Laser Frequency-Quadrupled High-Power Diode Laser

High-power, tunable UV, blue, green stabilization of the output (PowerLock) UV meets high power True cw single-frequency operation with laser, yellow or red laser light is integrated. Both optimization and TOPTICA’s TA-FHG pro unites a grating- linewidths below 500 kHz (coherence The DLC TA-SHG pro, a frequency- stabilization are available for fiber- stabilized diode laser and a tapered ampli- length > 200 m), output power levels up doubled amplified diode laser, is the coupled systems with the FiberMon fier as a fundamental light source with two to 500 mW, 20-40 GHz of mode-hop- system of choice if narrow-band, tunable option. A probe-beam output of the cascaded second-harmonic generation free tuning and coarse-tuning ranges of laser radiation with up to 2000 mW out- fundamental laser is also provided. The stages SHG pro – all integrated in one solid 1 - 4 nm make up the hero characteristics put power in the UV to visible wavelength TA-SHG pro lasers are available within laser head to obtain stable, high-power of this unique laser. It is equipped with range is required. Typical applications a wide wavelength range (currently UV laser light. state-of-the-art digital electronics to drive are laser cooling or trapping of atoms available 320 .. 780 nm with only few the laser diode and TA chip, to thermally and ions, metrology, spectroscopy, spectral gaps). Specific laser characte- control the two NLO crystals, and to TA-SHG pro — High-power, cw, tunable UV, Close-up of open TA-FHG pro — Tunable sing- holography and interferometry. ristics are customized to the respective stabilize the two SHG resonators. blue, green, yellow or red laser source. Options le-frequency UV laser with high output power. application requirements. · SUV for unprecedented DUV output The laser can be operated like a DL Key Features The system comprises a solid laser head Depending on the design wavelength, power and stability pro external-cavity diode laser. Typical Key Features and a DLC pro digital electronics rack, typical output powers range from 10 mW applications of TA-FHG pro lasers are · TA pro diode laser + SHG pro se- including all modules needed to ope- to 2000 mW. A medium-power solution · AutoAlign for TA, SHG and FHG stages ultra-high-resolution spectroscopy, laser · TA pro diode laser + two subsequent cond-harmonic generator in one box rate the fundamental diode laser, to without tapered amplifier (DL-SHG pro) cooling of atoms (e.g. Hg, H, Mg), ions second-harmonic generators · EOM option: Independent low-noise + ++ + + + stabilize the SHG resonator with respect is also available. (e.g. Mg , Yb , Al , In , Cd ,…), mole- SHG pro in one box error signal generation · UV, blue, green, yellow or red to the laser wavelength, and to thermally cules (NO) or condensed-matter stu- control the nonlinear crystal. Ultra-low dies via angle-resolved photoemission wavelengths: 330 - 680 nm Options · Fiber output of fundamental probe · Available wavelengths: noise sensitivity, best long-term stabi- spectroscopy (ARPES), and parametric beam and SHG probe beam 205 nm .. 330 nm, below 205 nm · 10 mW - 2000 mW output power lity of the laser frequency and output · AutoAlign for TA, SHG and FiberMon down-coversion to the visible range. upon request stages (wavelength dependent) power, as well as ease of use are the · Fast analog modules for further cornerstones of the design. Frequency linewidth narrowing · FiberMon option (for SHG wavelengths · 1 mW - 500 mW output power locking of the master laser is available · PowerLock: Active output power of 400 nm - 640 nm) (wavelength dependent) stabilization with the Lock option, and further line- · SYST control electronics or medium power version DL-SHG pro available width narrowing is possible using fast · Integrated EOM option: Independent · 1 nm - 4 nm coarse tuning upon request · Up to 15 nm coarse tuning lock modules (DigiLock 110, FALC 110) low-noise error signal generation (wavelength dependent) (wavelength dependent) in combination with DLC ext. · Fiber output of fundamental probe · Tunable single-frequency emission, beam and SHG beam DL pro · Tunable single-frequency emission, TOPTICA’s patented beam-steering mir- Optical isolator typ. linewidth < 500 kHz typ. linewidth < 200 kHz ror mounts guarantee best short and · Fast analog modules for further long-term stability of the output pow- linewidth narrowing · Probe-beam output of · Probe-beam output of fundamental er. With the AutoAlign option, servo- fundamental laser Folding laser and SHG beam controlled mirrors and built-in intelli- · SYST control electronics or medium- mirrors gence re-optimize the beam alignment power version DL-SHG pro available · SHG pro key features see page 36 · SHG pro key features see page 36 into the TA chip and the SHG cavity upon request at the push of a button. Active power Mode matching optics DL pro Tapered Opticalisolator ampli er

PD PD Schematic of the TA-FHG pro laser head: High-power tunable UV laser radiation is Schematic of the TA-SHG pro laser head: Beam shaping generated by two-fold frequency doubling Beam shaping High power at common and exotic wavelengths optics of an amplified diode laser TA pro (Medium- optics (Medium-power version DL-SHG pro does not power version DL-FHG pro does not include include the TA section.). Resonantdoublingcavity the TA section.).

32 www.toptica.com www.toptica.com 33 TA-SHG pro and TA-FHG pro TOPSeller Systems Options and Customization Pre-Configured Lasers for Selected Applications Versatility of Frequency-Converted Systems

Pre-configured laser systems Key Features SUV TOPTICA’s frequency-converted sys- TOPTICA’s TOPSellers are designed for tems are ready for a multitude of applica- some of the most common applications tions with their standard configuaration. · Specifications matched to A modified FHG cavity design allows for unprecedented DUV of our frequency-converted systems: For customers wanting to go one step experimental requirements output power and stability. Warranty included. Spectroscopy of (anti-)hydrogen, laser further, the following customizations are H cooling applications with magnesium available: · One laser head (DL pro master laser AutoAlign DLC 2 x Lyman α ions, beryllium ions or mercury atoms + tapered amplifier + air-sealed SHG require DUV lasers. In the visible range, Automated alignment of beams coupled to TA, SHG and FHG Exotic wavelengths pro stage + 2nd SHG stage for FHG cavities, and FiberMon. No compromising of passive stability - applications like the two-photon Ryd- Exotic nonlinear crystals can be used systems) and DLC pro rack AutoAlign is 100% switched off during normal operation. berg excitation of rubidium via the D1 or to overcome the stringent limits on the D2 line, laser cooling of strontium, sodi- FiberMon lowest possible SHG wavelength impo- Li Be · Tunable single-frequency emission DLC Lithium DLC Be+ cooling um, ytterbium (ions and atoms), are ad- sed by standard materials. For examp- with < 500 kHz linewidth and Allows measurement of the SHG output power propagating in a cooling dressed with preconfigured TA-SHG pro le, the potassium fluoroboratoberylla- DLC TA pro 670 10 mW - 1500 mW output power single-mode, polarization-maintaining (SM-PM) fiber for PowerLock DLC DL pro 670 systems. te (KBBF) crystal enables us to reach (TOPSeller dependent) and AutoAlign. Two wavelength regions are available. wavelengths below 200 nm. Another FiberDock Other popular applications are quantum option is sum-frequency generation Na Mg · Excellent beam profile of all output information storage in nitrogen vacancy from two different wavelengths in con- DLC Sodium DLC Mg+ cooling beams Fiber coupling of various output beams: Fundamental probe beam, cooling centers, in praeseodymium or europium. ventional crystals. SHG probe beam, and SHG output beam. Characteristics and specifications are · Probe-beam output of fundamental matched to the requirements of the re- (Raman) Fiber amplified systems laser beam (and SHG beam in FHG High Power spective application. TOPSellers are Fiber amplifiers can provide higher out- systems) K Ca proven and recommended by TOPTICA At certain wavelenghts, high power tapered amplifiers are available. put power than diode lasers or tapered + DLC TA pro 765 DLC Ca cooling customers. The option includes high-current driving electronics and a high- amplifiers. Thus, output powers of DL- DLC DL pro 780 DLC DL pro 850 · SHG pro key features see page 36 power capable SHG stage. DLC DL pro HP 420 SHG pro or DL-FHG pro systems can DLC DL pro HP 397 DLC DL pro 850 EOM be significantly increased by using such amplifiers. An EOM before the doubling cavity allows to independendly create Rb Sr Pr the PDH signal for laser locking. Advantageous for nondisturbed DL DLC Ryberg Rb I DLC Sr cooling DLC Pr Storage pro operation and maximum mode-hop-free tuning range in case TOPTICA has extensive experience and DLC Ryberg Rb II DLC DL pro 461 HP DLC TA pro 780 of SHG cavity, and significant RIN reduction and suppression of UV access to the world‘s leading single-fre- DLC TA pro 795 DLC DL pro 670 DLC DL pro 780 DLC DL pro HP 420 sidebands in case of FHG cavity. quency high power fiber amplifier manu- DLC DL pro HP 420 Narrow Linewidth facturers. For example, the laser guide Cs Ba Yb Dy Hg star system uses a Raman fiber amplifier, The DL pro master laser is replaced by a narrow-linewidth version. DLC TA pro 850 DLC Yb cooling DLC Dy cooling DLC Mercury and is capable of emitting 20 Watts of DLC DL pro 850 DLC Yb+ cooling Cooling Other master lasers (DFB/DBR) available upon request. output power around 589 nm from a DLC DL pro HP 461 DLC DL pro 369 DLC DL pro HP 637 DL-RFA-SHG pro like system. Advanced Locking Laser-cooled Sr atoms. Various lock options from side-of fringe frequency stabilization to Similar systems are available at other Ch. Lisdat, PTB Braunschweig, Germany. PDH linewidth narrowing available. Modules like PDD 110/F, FALC wavelengths (above 250 nm for FHG and or DigiLock can be installed in the DLC ext extension rack, with 500 nm for SHG systems) on request. A number of TOPSeller systems are available, e.g. for laser cooling or excitation of specific transitions. Listed in this cut-out of the periodic table shortest-possible cable length right next to the laser head (see Do not hesitate to challenge us! are all TOPTICA TOPSeller solutions for each element. Frequency-converted diode lasers are marked in bold letters. TOPSellers based on direct chapter Laser Locking & Laser Driving). diode lasers (see page 19) or amplified TA systems (see page 26) are mentioned for completeness. DL pro TA-FHG pro TOPSeller TA-SHG pro TOPSeller Poer 1 n H Poer n H Poer n (R)FA 2x Lyman Mercury Mg+ Be+ Yb+ Ca+ Strontium Rydberg TOPSeller alpha cooling cooling cooling Cooling Cooling Cooling Rb I

Output power 60 mW 60 mW 30 mW 300 mW 40 mW 1500 mW 700 mW 800 mW Coarse tuning 1 nm 1 nm 2 nm 2 nm 1 nm 2 nm 4 nm 8 nm H Poer Rydberg Ytterbium N-V Sodium Praseodymium Dysprosium Lithium H Poer TOPSeller Rb II Cooling centers cooling Storage Cooling Cooling

Wavelength 479-488 nm 556 nm 575 nm 589 nm 606 nm 626 nm 671 nm Resonant doubling cavity Output power 1000 mW 400 mW 10 mW 1000 mW 800 mW 800 mW 800 mW p elen n Coarse tuning 9 nm 5 nm 10 nm 4 nm 6 nm 10 nm 4 nm The KBBF crystal enables frequency doubling to FHG wavelengths below The versatility of TOPTICA’s lasers allows for straight forward 205 nm. implementation of (Raman) fiber amplifiers.

34 www.toptica.com www.toptica.com 35 Class 4 Laser Product EN 60825-1:2007. Visible or insible laser radiation. SYST SHG pro Avoid eye or skin exposure to direct or scattered radiation. Caution - Class Specifications 4 visible and/or insivisble laser radiation when open. Avoid exposure to the beam, avoid eye or skin exposure to direct or scattered radiation. Magnetic Stand-Alone Second Harmonic Generator fields may be present which may affect the operation of certain pacemakers. Frequency-Converted Diode Lasers

Key Features Professional unit for frequency Options Specifications doubling of cw lasers The stand-alone Second-Harmonic Gene- · EOM option: Independent low-noise DL-SHG pro / TA-SHG pro DL-FHG pro / TA-FHG pro · Air-sealed bow-tie cavity with highest rator SHG pro is the device of choice for error signal generation mechanical and thermal stability Center wavelengths 320 .. 680 nm* / 330 .. 780 nm* 225 .. 320 nm* / 190 .. 390 nm* frequency-doubling of existing cw lasers. · Fiber input Typical power range 1 .. 40 mW / 10 .. 2000 mW 50 .. 1000 μW / 1 .. 500 mW The SYST SHG pro package comprises · Customized optics and AR-coated mode-matching optics for the external Typical tuning range 2 .. 20 nm 1 .. 4 nm NLO crystal selection · Fiber output of wavelengths laser, ultra-stable beam-steering mirrors, above 350 nm Typical mode-hop-free tuning range ~ 20 GHz ~ 30 GHz electronics for Pound-Drever-Hall stabiliz- · Analog electronics for Pound-Drever- ation with automatic relocking of the reso- Typ. linewidth (µs) < 200 kHz < 500 kHz Hall locking with automatic relock · Double-Piezo Lock with up to 30 kHz nator length and temperature control of the bandwidth < 200 MHz / K < 400 MHz / K and temperature control for NLO Long-term frequency change with room temperature** NLO crystal, the bow-tie resonator in pro crystal included (typ. < 100 MHz / K) (typ. < 200 MHz / K) design, and beam-shaping optics for the One actuator, driven by a FALC 110 Spatial mode Nearly diffraction limited, collimated, M² < 1.2 typ. frequency-doubled light. module, accomplishes high-bandwidth · Adjustments with closed head / locking while the other one is used in Beam height 50 mm resonator The AR-coated NLO crystal and the mirror conjunction with a PID 110 for large- Probe-beam output Fundamental light with ~ mW power level coatings are specially selected according to amplitude regulation. TOPTICA offers customer requirements. The Double-Piezo competent technical support to adapt the Polarization Linear, > 100:1 Lock – two integrated piezo-electric actu- SHG pro to many varieties of existing laser RIN 10 Hz ... 10 MHz (typ.) < 0.2 % < 1 % ators for the stabilization of the resonator systems. The SYST SHG pro will be Residual infrared unfiltered < 1 % length – can be added to the SHG pro. installed and demonstrated on-site. SHG cavity leak rate < 10-3 mbar l s-1 Specifications SHG pro Warm-up time Few minutes, depending on crystal temperature Wavelength range* 410 nm - 1600 nm → 205 nm - 800 nm Environment temperature Operation: 15 .. 30°C (non-condensing), transport: 0 .. 40°C Optical conversion efficiency*,** 410 nm - 500 nm → 205 nm - 250 nm 5 - 10 % Operating voltage 100 .. 120 V / 220 .. 240 V AC, 50 .. 60 Hz (auto detect) 500 nm - 700 nm → 250 nm - 350 nm 12 - 20 % Power consumption Typ. < 100 W, max. 300 W

700 nm - 900 nm → 350 nm - 450 nm 20 - 30 % Size laser head (H x W x D) 90 x 410 x 485 mm3 90 x 410 x 692 mm³ 900 nm - 1600 nm → 450 nm - 800 nm 30 - 60 % Electronics Single-stage 19“ rack DLC pro General characteristics *Spectral coverage with gaps. Beam quality Nearly diffraction limited, single-mode fiber-coupling efficiency > 60 % @ 400 nm **Under stable laboratory conditions. Beam diameter 1 - 2 mm Beam height 50 mm Tuning range > 60 GHz @ 400 nm output (continuous), 5-10 nm (coarse) Polarization Linear, > 100:1 Residual infrared Typ. < 0.1 % Locking scheme*** Pound-Drever-Hall with automatic relock, Double-Piezo Lock optional Output power noise Typ. < 1 % (depending on laboratory conditions and fundamental laser) SHG cavity leak rate cavity leak rate < 10-3 mbar l s-1 Dimensions (H x W x D) 90 x 216 x 400 mm3 (head) and 19“ control rack *Full wavelength range coverage requires several NLO crystals and mirrors, other wavelengths upon request. **Assuming 1 W single-frequency (< 1 MHz linewidth) cw laser input. Max. output power may be limited by crystal and optics lifetime. ***May require additional EOM (purchase and integration from TOPTICA recommended)

Resonant doubling cavity Schematic of SHG pro, stand-alone resonant SYST SHG pro – flexible stand-alone second- frequency-doubling cavity. harmonic generator for single-frequency cw lasers.

The DLC pro supports all lasers of TOPTICA’s DLC pro is a fully digital TOPTICA’s cw diode laser series: All controller for tunable diode lasers, offering laser systems in the lab may be operated a new level of stability and lowest noise via the same intuitive user interfaces or while allowing intuitive and comfortable command language. control. Zooming into a Doppler-free line on a touch display and locking by tapping Features the desired peak opens up a completely new way of working with lasers. · Current, temperature and piezo controller with lowest noise and drift A well-configured ReLock mechanism DLC pro — All-digital diode laser controller. · No fans for cooling required: High reliability greatly increases an experiment‘s uptime, and low acoustic noise especially when it involves several lasers.

· Signal display with hardware zoom The advantages of using a digital con- Options (changes scan parameters to zoom trol are starting to become available: into spectrum, etc.) · The direct laser systems available with A Power Lock allows for an active sta- DLC pro control: · Power Lock via control of current of bilization of the power, using an internal - DLC DL pro laser diode or tapered amplifier current photodiode if available, to compensate in kHz range - DLC DL pro HP for slow degradation of alignment or laser - DLC DFB pro · Scan generator and X/Y, time- and diode performance. Moreover, it is possib- - DLC CTL frequency (FFT) display le to use the included air pressure sensor - DLC TA pro to compensate for length changes in the LASER LOCKING & LASER DRIVING · Side- and top-of-fringe locking* laser cavity and hence improve the stability · Systems with frequency multiplexing against mode-hopping even further. available with DLC pro control: · Two PIDs, lock-in signal generator* - DLC DL-SHG pro Electronic Control for Passive Stability and Active Locking - DLC TA-SHG pro · Lock detection and ReLock* The DLC pro Lock is a software licence - DLC DL-FHG pro that enables the frequency lock of DLC - DLC TA-FHG pro · Total remote control: PC GUI (included) pro controlled lasers at bandwidth of up to and commands via TCP/IP and USB, e.g. 30 kHz. Both, top-of-fringe and si- for LabView or Python control programs · Break-out cable for digital lines Apart from a well-engineered opto- The DLC pro offers intuitive dial and The DLC pro also offers laser-frequency de-of-fringe locks are enabled - including mechanical design and the integrated multi-touch control on a 7” capacitive locking enabled by a software license: A · Free software updates available on the modulation of the laser frequency and · DLC pro Lock: Enabling of frequency laser diode, the most important part of a touch display. Remote control is 30 day trail version is included. It has never www.toptica.com the demodulation of the spectroscopic locking features via software key. tunable diode laser system is its driving possible via USB and Ethernet (TCP/IP), been so easy to scan and lock a laser! signal. electronics, which is responsible for getting using either a graphical user interface * These features are enabled with the DLC pro Lock software license. the most out of a laser system. on a standard PC, which is specifically TOPTICA also provides a number of developed for the DLC pro and included electronic modules for locking laser Wide mode-hop-free tuning with Littrow with the system, or through a vast set of systems, e.g. DigiLock, the first digital laser setups requires a well-defined interplay software commands. locking solution or the analog FALC 110, Left: Comparison of the current noise 106 Frequency Noise 1000 ]

between piezo actuator and current the fastest locking electronic. The DLC ext ] 1/2 SYST DL pro Hz] /Hz] 2 driver. Drifts of the laser diode current, allows to combine these electronic 105 316 Right: Frequency noise density of the the temperature or the piezo voltage modules with the DLC pro. 10n laser light created with a DLC DL pro DCC 110 104 100 determine the drift of the laser frequency and a SYST DL pro. and the stability against mode-hopping. 1n 103 32 DLC pro CC-500 Power Spectral Density [Hz Linear Spectral Density [Hz/ Noise on any of these outputs increases CurrentNoise Density [A/Hz 102 10 Current Noise Density [A/Hz Detection Limit at 10 Ω the laser linewidth. For laser frequency 100p 100m 1 10 100 1k 10k 100k 100 1k 10k 100k stabilization and linewidth narrowing, FrequencyFrequency [Hz] [Hz] Frequency [Hz]

various locking schemes are used and 1 require a variety of compatible options (see 50 Left: Delayed self-heterodyne linewidth DLC pro 25.00 45 pages 10). 0.1 SYS DC 110 measurement. Due to the long coheren- 24.95 DLC pro 40 ce length periodic modulation appears. The digital DLC pro represents the latest 0.01 SYS DC 110 35 The linewidth is obtained from the mo- 24.90 30 dulation depth (see page 9). stage of development of laser control 1E-3 25 electroncis. Its noise and drift properties 24.85

Beat signal [a.u.] 20 Right: Temperature of a DL pro laser head Beatsignal [a.u.] 1E-4 are even better than the well established 15 connected to a laser control electronics, 24.80 Laser Temperature Head [°C] Laser Head Temperature [°C] Temperature Laser Head 10 which is located in a climate chamber and and widely used preceeding electronics TemperatureClimate [°C] Chamber

1E-5 Climate Chamber Temperature exposed to the temperature sequence SYS DC 110, which is still available as Easy operation of lasers with either an included computer 24.75 5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 00:00 03:00 06:00 09:00 12:00 15:00 shown by the blue line. economic solution. program or at the laser controller directly. FrequencyFrequency [Hz] [MHz] TimeTime [hh:mm] [hh:mm]

38 www.toptica.com www.toptica.com 39 Specifications PDD 110/F, FALC 110 and mFALC 110 DLC pro High-Bandwidth Linewidth Control with Optional Analog Mixer

DLC pro Specifications Specifications PDD 110/F – fast Pound-Drever-Hall Researchers using the FALC 110 highly detector module benefit from a fast circuit layout. At 10 MHz General / MC Current Control CC-500 CC-5000* The Pound-Drever-Hall Detector PDD there is a phase delay of less than 45 de- Touch display, 10 push buttons, 2x 245 mA or Operator controls Max. laser current 5000 mA 110/F serves to lock a diode laser to the grees, and the bandwidth of the fastest 4 knobs, 1 key switch 1x 490 mA (selectable) maximum of an absorption, reflection or signal path reaches 100 MHz. Display 7 inch, 800 x 480 pixels, 262k colors 7 V @ 360 mA, Max. laser voltage 3.5 V transmission feature, such as an optical Projective capacitive (PCT) 5 V @ 490 mA Touch panel resonator or an atomic line. The module In a typical setup, the fast output of the FALC with multi-touch capability Smallest current step 0.015 μA 5 μA generates an HF modulation signal that 110 controls the current of an ECDL or DFB Interfaces Ethernet and USB 280 pA/√(Hz) Current noise density 120 nA/√(Hz) acts either on the laser current, or on an laser. Additionally, a slow integrator cancels @ 1 kHz Inputs / Outputs electro- or acousto-optic modulator (EOM, out long-term frequency drifts, by acting Low-frequency current PDD 110/F — Pound-Drever-Hall detectors. 2x (24 bit, DC .. 300 kHz) < 50 nA p-p 10 µA p-p AOM). A phase-sensitive detector unit either on the grating piezo of an ECDL, or Analog inputs (BNC) noise (0.1 Hz ... 10 Hz) FALC 110 — Fast Analog Linewidth Controller. 2x (16 /10 bits, DC .. 300 kHz / 1.7 MHz) (1) demodulates the spectroscopic signal on the temperature of a DFB laser. mFALC 110 — FALC with integrated mixer. Temperature coefficient <3 ppm/K typ. Input range, impedance -4 V .. + 4V, 10 kOhm 100 Hz and produces an error signal, which, in of laser current after >1 h warm-up Analog outputs, BNC 2x (16 bit, DC .. 300 kHz) turn, serves as input for a PID regulator mFALC 110 – the solution for phase Long-term stability < 100 ppm/√(khrs) (e.g. FALC 110). locking Output range, impedance -4 V .. + 4V (no load), 50 Ohm of laser current after >1 h warm-up The mixing FALC (mFALC 110) extends Digital inputs** 4x TTL, 10 kOhm, Sub-HD 15-pin DC to 15 kHz .. 30 kHz Modulation bandwidth 100 Hz FALC 110 - highest bandwidth for the functionality of the FALC 110 by Digital outputs** 4x TTL, 50 kOhm, Sub-HD 15-pin (depending on laser diode) frequency locking integrating an additional analog mixer. The Piezo Control PC Temperature Control TC The Fast Analog Linewidth Controller module accomplishes fast phase-locking Piezo voltage range -1 V .. +140 V Smallest set-temperature step 50 μK FALC 110, a high-speed control amplifier, of two diode lasers to a local RF oscillator: Act. temperature noise Max. piezo current performs advanced frequency stabilizati- The beat signal of the two lasers is mixed < 300 μK p-p 25 mA (100 μHz ... 1 Hz) (charge/decharge) on tasks, such as laser linewidth reducti- with and phase-stabilized to the external Smallest piezo voltage Repeatability of actual temp. < 0.001 K after >1h warm-up 0.01 mV on or high-bandwidth frequency locking. RF source. step Temperature coeff. of actual The module is compatible with any of < 140 ppm K/K after >1h warm-up Voltage noise density 140 nV/√(Hz) @ 1 kHz temperature TOPTICA’s tunable diode lasers such as Sub-Hertz linewidths Beat measurement of two independent ECDLs Temperature coeffi- Environment / Supply < 40 ppm/K the DL pro, DL 100 and DL DFB. The design works: Researchers at MPQ locked to two high-finesse ULE cavities, one of cient of piezo voltage them using FALC 110. The beat width was less Voltage requirements 100 - 240 V~, 50/60 Hz Garching locked two diode lasers to two than 0.5 Hz over 8 s. The inset shows the phase Small-signal bandwidth 3 kHz (0 load) high-finesse cavities with a resulting beat Power requirements < 220 W, typ. 35 W, no active cooling fans stability of the beat note filtered with a 100 Hz *For TA pro systems. Two CC-5000 can be combined to drive width of less than 0.5 Hz(1). Sub-Hertz Size (H x W x D) 154 mm x 450 mm x 348 mm low-pass filter (J. Alnis, MPQ Garching). one amplifier chip at up to 10 A. frequency stabilization of a DL pro with Weight 8.0 kg (with MC, CC-500, PC, TC) **Optional break-out cable with 8 SMB connectors available. FALC was shown at the MPL Erlangen(2). And scientists at the University of Frank- furt used the mFALC to maintain a stable phase lock of two DL DFB lasers to a local RF oscillator, and employed this setup for Pound-Drever-Hall detection scheme. coherent terahertz imaging(3). DLC ext Combination of DLC pro with fast locking modules PDD 100/F FALC 110, mFALC 110 Input section Input section Two high-speed differential inputs, Error signal generated Dispersive error signal for top-of-fringe locking Inputs adjustable input offset Modulation frequency 20 MHz (default), adjustable from 12 .. 35 MHz Fast circuit branch The DLC ext allows extending the Output section Features Signal delay < 15 ns, DLC pro with TOPTICA’s well-establis- HF output amplitude 1 V pp (+4 dBm) @ 50 Ω PID regulator · Supports up to two modules, any two Phase delay < 45° @ 10 MHz hed fast locking modules. These modules Second-harmonic PDD 110, FALC 110, mFALC 110 and > 30 dB typ. DC gain 15 dB .. 80 dB DigiLock and FALC (see next page) DigiLock 110 suppression Output voltage range Max. ± 2 V @ 50 Ω provide high performance laser locking if General specifications Slow integrator Adjustable LO phase a faster feedback than available with the · 4 BNC signal outputs for access to 0° - 190°, inversion +/- 180° 10 kHz, for grating piezo or at mixer Bandwidth DLC pro Lock option is needed. backplane signals laser temperature control Total signal delay < 12 ns (100 MHz bandwidth) DC gain Typ. 110 dB · External power supply with automatic Number of detection 1 (2 possible with PDD 110/F DUAL) mains voltage detection channels Output voltage range Max. ± 5 V, high-impedance load RF input (beat signal of two lasers, mFALC only) Laser system DLC DL pro extended by a DLC ext equipped with a DigiLock. Frequency range 10 MHz .. 200 MHz Max. input voltage 5 V DC, 4.5 V pp AC LO input (local oscillator, to be mixed with RF input, mFALC only) Frequency range 10 MHz .. 200 MHz, sine wave preferred Max. input voltage 2 V DC, 2.8 V pp AC

1 J. Alnis et al., Phys. Rev. A 77, 53809, (2008). 2 Y. N. Zhao et al., Opt. Commun. 283, 4696, (2010). 3 F. Friederich et al., Opt. Express 18:8, 8621, (2010). 40 www.toptica.com www.toptica.com 41 DigiLock 110 DigiLock 110 Digital Feedback Controlyzer for Laser Locking and Analysis Digital Feedback Controlyzer for Laser Locking and Analysis

Laser stabilization easier than ever numerous high-speed and high-precision Functionality Value Unit Comment Selfmade solutions for stabilization tasks AD and DA converters, the FPGA pro- Scan frequency 0.1 - 33 x 106 Hz Bandwidth limited on some channels often involved a heap of electronics, vides the needed flexibility with sufficient Waveform types Sine, triangle, square, sawtooth soldering, trial and error, and frustration. bandwidth. The large bandwidth, in fact, PID function 1 The DigiLock 110 is TOPTICA’s versatile allows for substantially reducing diode la- Signal latency 200 ns ADC and DAC latency included solution: a digital locking module, flexible ser linewidths: using two DigiLocks 110 to Parameters P, I, D, I cut-off to solve locking tasks with perfection, lock two DL pro to one FPI 100, a beat PID function 2 and yet easy to use thanks to intelligent width of less than 300 Hz was measured. Signal latency 200 ns ADC and DAC latency included software control with a clear and comfor- Parameters P, I, D table graphical user interface. As shown with FALC 110, it was possible DigiLock 110 — A versatile, digital locking Analog P function module for DLC ext or SYS DC 110 electronics. to also achieve sub-Hz linewidths with the In addition to standard functions like si- DigiLock 110, utilizing the high-bandwidth Bandwidth 21 MHz (-3 dB, 200° phase) de-of-fringe and top-of-fringe locking, analog bypass. Lock-In function the DigiLock 110 offers computer Modulation frequency 0.012 – 781 kHz Features control over the laser, signal visualization, Intelligence in laser stabilization Pound-Drever-Hall function · Scan generator and signal analysis. In AutoLock mode, The DigiLock 110 tries to support the Modulation frequency 1.56, 3.13, 6.25, 12.5, 25 MHz · Laser control the user can modify the scan parameters laser user wherever possible. In addition to Input Resolution Sample Bandwidth Impedance of the laser by dragging the mouse, and the aforementioned features, the DigiLock Range (V) Comment · Multi-channel Oscilloscope channels (bit) rate (Hz) (-3 dB) (Hz) (Ohm) zoom into a feature of a spectrum on the can be configured to detect whether the Input signal

has to be between ± 3.5 V, Main in 14 100 M 14 M ± 2.1 50 · Controller Design software oscilloscope screen. frequency is locked – locked in general – and amplification can be controlled from DigiLock Software or even whether the laser is locked to the Aux in 14 100 M 15 M ± 2.1 50 · Dual PID + P With the feature displayed on the screen, right position. Precise in 16 200 k 50 k ± 2.0 10 k one can then simply “Click & Lock” to any · Click & Lock DCC Iact 16 100 k 15 k ± 13.1 40 k SYS DC 110 backplane peak or slope. For optimizing lock parame- It is for example possible to define a DTC T 16 100 k 15 k ± 13.1 40 k SYS DC 110 backplane · Pound-Drever-Hall act ters, spectral analysis of error signals can voltage window in a Doppler-broadened AIO 1 in 16 100 k 15 k ± 12.5 47 k Normally used as output · AutoLock & ReLock be performed, as well as measurements of spectroscopy signal, that contains only AIO 2 in 16 100 k 15 k ± 12.5 47 k actuator transfer functions. one transition of the corresponding Sum in 27 M ± 1.0 50 Bandwidth between and

· Lock-in Doppler-free signal, thus allowing the · Computer control DigiLock 110 – flexibility and perfection laser to only lock to this particular peak (see Output Resolution Sample Bandwidth Range (V) 50 Ohm driver Comment Flexibility and perfection both origina- AutoLock & ReLock example, page 43). channels (bit) rate (Hz) (-3 dB) (Hz) · Spectrum analysis te from the underlying technology: The Main in 14 100 M 19 M ± 1.0 Yes Sum of and analog P branch Once out of lock, the DigiLock can start Aux in 14 100 M 19 M ± 1.0 Yes · Network analysis hardware is based on a fast FPGA (Field Programmable Gate Array). Together with searching, at pre-set speed, over a SC 110 out 21 100 k 18 k ± 6.5 No SYS DC 110 backplane; amplification by 15 with SC 110 configurable width, until the voltage lies DCC Iset 21 100 k 18 k ± 6.5 No SYS DC 110 backplane within the locking window again and the DTC Iset 16 100 k 18 k ± 6.5 No SYS DC 110 backplane laser is tightly locked. The automatic AIO 1 out 16 100 k 16 k ± 6.5 No relock makes frequent manual readjust- AIO 2 out 16 100 k 16 k ± 6.5 No Normally used as input ments obsolete. Sum in 27 M ± 1.0 50 Bandwidth between and

Error out = (

+ ) x Gain/2; bandwidth Error out 20 M ± 1.7 Yes Multiple DigiLocks and remote control between

and The latest software version of the TRIG 0, 2.6 Yes DigiLock 110 offers control of up to four DigiLocks from one computer. Also, 620m 884 -320m 140m 600m 750 -400m 130m 580m 120m -450m remote control via TCP/IP is now available, 560m 110m 500 so the DigiLock can be integrated in 540m -500m 100m 520m LI out [a.u.] -550m 90m

250 Au in [V] 500m 80m -600m automated experiments and controlled by 480m 70m 0 -650m 60m

460m Main in [V] Main in [V]

other hard- and software. scan [V] Captured 440m -700m 50m 420m -250 40m -750m 400m 30m -800m 380m -500 20m 360m -515 -850m 10m 21.8 21.9 22 22.1 22.2 22.3 0m 10m 20m 30m 40m 50m SC110 out [V] Time [s]

“Click & Lock”: “AutoLock & ReLock”: “Spectrum and Network analysis”: The user can click on the slope position or The DigiLock enables/disables multiple PIDs The DigiLock can show the spectrum of an error on any maximum or minumum. The laser and an analog P component simultaneously. signal, for example to reveal oscillations. scans to this position, and the DigiLock Once in lock, the error signal is plotted against Actuator transfer functions and bandwidth activates the lock. the scan voltage for monitoring. The user can can be measured by sweeping a modulation define voltage windows to allow the DigiLock to an actuator and measuring the response in to lock to certain features only, and initiate a amplitude and phase. The picture shows a search if the voltage lies outside the window. measurement of the DL pro piezo resonance DigiLock‘s graphical user interface. frequency.

42 www.toptica.com www.toptica.com www.toptica.com 43 Free Space Optical Isolators High Power Tunable Single and Dual Stage Performance

TOPTICA’s product line of Faraday optical TOPTICA’s isolators enable state of the art isolators are specially designed and manu- protection for the most stable lasers in the factured in-house by the laser experts of world. These are the same components TOPTICA to give industry leading perfor- already used by TOPTICA in the industry- mance in single and dual stage configura- leading DL pro, DL 100, TA-SHG pro, tions. Single stage devices provide at least and TA-FHG pro product lines. They have 38 dB isolation and 85 % transmission been demonstrated to effectively reduce (>43 dB and >92 % average) over indivi- feedback in external cavity diode laser dual wavelength ranges in total spanning systems, block reflections from free-space 395 - 425 nm and 630 - 1400 nm. Dual fiber coupling, increase power stabilizati- TOPTICA offers single-stage and dual-stage stage models provide at least 60 dB isola- on in optical systems, and eliminate feed- optical isolators. tion and 80 % transmission (> 67 dB and back-induced damage to sensitive optical >90 % average) over individual wavelength components. The same superior isolators Key Features ranges in total spanning 640 - 1100 nm. All that make TOPTICA lasers the industry models are wavelength adjustable and can standard are now offered individually. · High power damage threshold 2 handle power densities up to 4 kW / cm . (4 kW / cm2) Other wavelengths and broadband iso- · Highest guaranteed isolation in High isolation, transmission, and pow- lators as well as OEM customizations industry er densities are achieved with precision are available upon request. Additional > 38 dB (single stage) polarizers and precisely designed Fara- wavelengths spanning the UV to NIR > 60 dB (dual stage) dayrotator elements. Most isolators have regions are also available for integration · High transmission magnetically locked and removable pro- into our scientific laser systems. · Wavelength coverage 395-425 nm, PHOTONICALS tective endcaps and mounting fixtures. 630-1400 nm All internal optical components are angled · All internal components angled 1° to Laser Diodes and Accessories to eliminate collinear back reflections. eliminate back reflections Extensive individual, wavelength-specific · 4.7 mm clear aperture testing guarantees performance of each · All isolators are wavelength isolator. All optical sub-components are adjustable inspected upon receipt, and all assem- Photonic accessories and laboratory tools the spectral performance and monitor We focus on a “selection of the best”: bled devices are tested for transmission are just as important as the laser itself. the wavelength, to name just a few Unique components and top-grade and isolation over their design wavelength everyday tasks. instruments that are extremely useful in ranges before shipment. Researchers in modern optical the daily operation of diode lasers. laboratories need to prepare their laser TOPTICA offers a variety of Photonicals beams in the requested shape, separate – instruments and components that For detailed product specifications, please Single Stage Isolators them from undesired feedback, control upgrade, refine or characterize lasers. refer to our website www.toptica.com. Model SSR405 SSR650 SSR690 SSR730 SSR780 SSR835 SSR885 SSR945 SSR1150 SSR1250 SSR1350

Design Wavelength [nm] 405 650 690 730 780 835 885 945 1150 1250 1350

Tunable Wavelength Range [nm] 395-425 630-670 670-710 710-750 750-810 810-860 860-910 905-985 1100-1200 1200-1300 1300-1400

Fixed Operation Range* [+/- nm] 2.5 5 6 6.5 7 7.5 8 9 10 10 10

Clear Aperture 4.7 mm Isolation at Design Wavelength 38/43 dB (Min/Ave) Operating Temperature Range 15 °C to 40 °C, non-condensing

Storage & Transport Shock 25 g / 10 ms., Vibration 3 g (15-100 Hz), 0 °C to 60 °C non-condensing *with respect to design wavelength >35 dB and >85 % Dual Stage Isolators

Model DSR660 DSR700 DSR740 DSR780 DSR820 DSR880 DSR950 DSR1020 DSR1070 Design Wavelength [nm] 660 700 740 780 820 880 950 1020 1070 Tunable Wavelength Range [nm] 640-680 680-720 720-760 760-805 800-865 860-930 930-995 995-1050 1050-1100 Laser Diodes FiberDock − Patented ultra-stable precise Fixed Operation Range* [+/- nm] 6 6.5 7 7.5 8 10 11.5 12 12 · Unique selection of FP, AR and DFB diodes, 369 .. 3500 nm 6-axes mount for convenient single-mode Clear Aperture 4.7 mm · Tapered amplifier chips, 660...1495 nm with up to 3.5 W fiber coupling. Isolation at Design Wavelength 60 / 67 dB · All diodes and amplifiers extensively tested and qualified (Min/Ave) · Check our regularly updated diode and TA chip stock list: Operating Temperature Range 15 °C to 40 °C, non-condensing www.laser-diodes.com Storage & Transport Shock 25 g / 10 ms., Vibration 3 g (15-100 Hz), 0 °C to 60 °C non-condensing *with respect to design wavelength >60 dB and >80 %

44 www.toptica.com www.toptica.com 45 Difference Frequency Comb (DFC)

Inherently CEP-stable modular between 420 nm and 2200 nm. The stability of the f-2f interferometer. The real frequency combs extension modules can be upgraded at phase stability of the DFC is expected to The operating principle of the offset-free any time after purchase of the DFC CORE be below this value. Difference Frequency Comb relies on and are interchangeable between outputs. generating a broadband supercontinuum In addition, beam combiner (DFC BC) and Find out more about TOPTICA’s from the output of a low noise Er-fiber beat detector (DFC MD) units are available Difference Frequency Comb in our mode-locked oscillator and subsequent to provide RF beats between the DFC dedicated frequency comb brochure. optical Difference Frequency Generation comb lines and cw lasers. The RF output (DFG) between the low- and high- signal of the DFC MD can be counted frequency parts of the octave spanning to determine the frequency of the cw 1095 spectrum in a nonlinear crystal. The most laser. It also enables phase or frequency 1090 1085 important features are an improved stability stabilization of the cw laser to the DFC 1080 and a more simple and reliable, all passive using e.g. TOPTICA’s locking modules 1075 at m at frequency offset stabilization. The comb is mFALC or DigiLock. In the DFC CORE+ 1070 free from fluctuations of the offset-phase version, the RF output signal can also be 1065 and offset-frequency due to the common used to stabilize the DFC to the cw laser 1060 25 mode suppression of the two parts of the which serves as optical reference. 0 -25 a ma -50 original spectrum. Additionally, the carrier 0 5 10 15 20 envelope offset frequency f of the DFC Such a DFC system can be combined with im CEO Typical result of spectral interferometry for is fixed to zero. any of TOPTICA’s tunable diode lasers to out-of-loop measurement of the CEP stability. achieve a complete, frequency-referenced TOPTICA’s frequency comb product laser system including wavelength meter line is a modular system that supports and counter all from one source. Key Features a broad variety of applications. Three TOPTICA PRODUCT PORTFOLIO basic versions of the DFC are available: Spectral Interferometry · Patented CERO-technology („zero- DFC CORE, DFC CORE+ and DFC SEED. The performance of the CERO-technology fCEO”) with intrinsic CEP stability All models use TOPTICA proprietary is best characterized by means of spectral Completed Overview CERO-technology to achieve an unpre- interferometry. The dedicated setup · RMS phase stability < 35 mrad cedented low-noise performance. consists of an f-2f interferometer with optical spectrum analyzer which records · Frequency stability < 8·10-14 @ 1s The DFC CORE and its high performance optical fringes at the output. It measures (measured with RF reference), or TOPTICA develops and manufactures TOPTICA’s tunable diode lasers are well as ultrafast fiber lasers, are the basis version DFC CORE+ come with a digital the absolute phase stability of the fCEO same as reference high-end laser systems for scientific appreciated for excellent coherence, wide of our THZ product line which is world- oscilloscope for beat monitoring and a cancelation with respect to an independent and industrial applications. Our product tuning range and unique power/wavelength wide unique in performance and versatility. GPS disciplined RF reference included. reference. The figure shows a spectrogram · < 0.04 % RMS power fluctuations portfolio includes diode lasers, ultrafast coverage. Our non-tunable single-mode They both provide 4 or optionally 8 phase- of the interference fringes recorded over a diode lasers are also available in single- Thanks to our experience and a unique, fiber lasers, terahertz systems and stable outputs at 1560 nm. time of 20 seconds. The high interference · One free parameter frep with up frequency combs for markets such as frequency versions or multi-laser engines. patented technology, we were able to contrast is stable over the full time span to 3 control elements (oscillator quantum technologies, biophotonics or transfer the reliability of our OEM-type Several extension modules are available and no offset phase drift is observed. The temperature, piezo, pump current) materials test & measurement. Already since 2004, we provide ultrafast ultrafast fiber lasers to ultimately coherent, that can convert the DFC CORE / DFC measurement shows a RMS phase stability and > 400 kHz bandwidth fiber lasers which quickly matured from phase-stable and repetition rate controlled CORE+ outputs to any wavelength of 8 mrad over 20 s, which is limited by the Scientists – including over a dozen merely scientific products to fully hands- high-end systems. As culmination of our Nobel laureates – and OEM customers off and reliable OEM instruments while portfolio, we can even combine frequency acknowledge the world-class speci- maintaining required characteristics like combs with tunable and phase-locked fications of TOPTICA’s lasers, as well as high power, short pulses and appropriate single-frequency diode lasers to deliver their reliability, longevity and their ease of repetition rate. Both, tunable diode laser as optical frequencies as a package. use. With about 230 employees, TOPTICA takes always pride in developing new products to continuously push their limits or in specifically designing customized systems.

From several places in Germany, USA and Japan and including a global distribution network we provide exceptional service and application consulting worldwide. Founded in 1998 near Munich (Germany), TOPTICA became one of the leading laser photonics companies by consistently delivering high-end products.

46 www.toptica.com www.toptica.com 47 Single-Mode, Single-Frequency & Multi-Laser Engines ps / fs Fiber Lasers

iBeam smart TOPTICA’s single-mode diode lasers set FemtoFiber smart Ultrafast technology has seen a tremen- new standards in terms of power, low noi- dous success since it was introduced. · Single-mode diode lasers se and convenient OEM integration. They · Compact ultrafast fiber laser Many promising applications have 2 come with diffraction limited TEM00 output emerged, benefiting mainly from the high · TEM00, M < 1.2 · OEM one-box design · 375 nm .. 785 nm and reliable spectral properties, as well as · All PM fiber setup peak power and ultrashort pulse duration, · 50 mW .. 300 mW optional robust fiber coupling. Compact · 2000 nm, 1560 nm, which give rise to nonlinear effects and · cw and pulsed operation design and low power consumption make 1064 nm, 1030 nm, 780 nm open new paths in engineering and · Optional fiber output them superior to old-fashioned, bulky and · Pulse duration < 60 fs .. 10 ps scientific research. inefficient gas lasers. Multi-laser engines seamlessly integrate several wavelengths The key for successful use or integration into true one-box laser systems – swit- of ultrafast technology is a robust sys- TopMode FemtoFiber pro ching between colors has never been tem with simple push-button operation. easier. The systems‘ flexibility and ease TOPTICA offers cost-effective optimized · 405 nm, 445 nm, 488 nm, 515 nm, · Versatile ultrafast fiber laser of use enable straightforward deep inte- products fulfilling these requirements: 633 nm, 685 nm, 785 nm · 1560 nm, 1030 nm, gration into any customer’s system design. Ultrafast fiber lasers based on erbium- · 20 mW .. 500 mW 780 nm, 980-2200 nm, 830-1100 nm, and ytterbium-doped active fibers. All · < 25 MHz linewidth, 488-640 nm Visit www.toptica.com/products to find systems use TOPTICA’s FemtoFiber > 5 m coherence length · Pulse duration 25 fs .. 1 ps out more details. OEM and research technology, incorporating polarization- · Charm coherence control (TopMode) · Multi-arm synchronized inquiries welcome. maintaining fibers, saturable absorber mirror mode-locking, and reliable tele- com components. Visit www.toptica.com/ iChrome products/psfs-fiber-lasers to learn more Ideal for FemtoFiber ultra about our products. · Multi-laser engines · Confocal microscopy · High-power ultrafast fiber laser · 4 to 8 laser lines in one box · Live-cell imaging · 0.5 W @ 780 nm · Various power/wavelength options · Ellipsometry · 5 W @ 1050 nm · PM fiber output · Flow cytometry · < 150 fs pulse duration · Direct modulation up to 20 MHz · Interferometry AC · TEM00, M2 < 1.2 · COOL – hands-off, self-aligning system · Microlithography Ideal for · Microplate readout · Retina scanning · Multiphoton / SHG microscopy · Supercontinuum generation · Material processing (seeder) FemtoFiber dichro · Semicon inspection iBeam smart: Free-space output TopMode + iBeam smart WS: Free-space output 300 200 · Two-photon polymerization TopMode iBeam smart WS · “Two-color” ultrafast fiber laser · Time-domain terahertz 250 100 · Broadband mid-IR source · Pump-probe spectroscopy · 5 - 15 µm (20 - 60 THz) 200 80 · Optical coherence tomography · Output power > 0.5 mW · Attosecond science 150 60

Power [mW] 100 Power [mW] 40

50 20 pro TVIS (< 1 ps) 1000010000 0 0 pro NIR (< 150 fs) 375 395 405 420 445 460 473 488 505 515 633 640 660 685 785 405 445 488 515 633 638 685 785 Wavelength [nm] Wavelength [nm] ultra 780 10001000 pro TNIR (< 250 fs / < 1ps) 100 iChrome MLE iChrome SLE iChrome CLE pro SCYb (150 fs)

ultra 1050 80 100100 pro UCP (25 fs)

60 pro SCIR

Power [mW] 10

Power [mW] 10 pro IRS-II (< 40 fs) 40

Power [mW] dichro midIR

11 20

0 0.10.1 405 420 445 460 473 488 515 532 561 568 594 640 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 5000 10000 15000 400 600 800 Wavelength [nm] Wavelength [nm] 1000 1200 1400 1600 1800 2000 2200 2400 5000 10000 15000 Wavelength [nm] Output power / wavelength chart of TOPTICA’s single-mode (top left) and single-frequency (top right) diode lasers as well as multi-laser engines (bottom). Output power / wavelength chart of TOPTICA’s ultrafast fiber lasers.

48 www.toptica.com www.toptica.com 49 Terahertz Systems 3000

TOPTICA provides best-in-class systems for both time-domain and frequency- TeraFlash pro domain terahertz generation. The TeraFlash combines TOPTICA’s FemtoFiber smart · Time-domain THz system lasers with state-of-the-art InGaAs anten- · Up to 90 dB dynamic range

nas and sets new standards in terms of DL / DFB (pages 17-20) CTL (pages 12-15) (pages (24-29) TA SHG (page 36) FHG (pages 33-34) FHG-SUV (pages 31, 33) · 5 THz bandwidth 2000

dynamic range, bandwidth and measure- · Highest measurement speed ment speed for time-domain applications.

For frequency-domain terahertz spectroscopy, TOPTICA’s TeraScan systems – 1600 which are based on precisely tunable DFB TeraScan lasers, digital control electronics, and latest GaAs or InGaAs photomixer technology – · Frequency-domain THz system provide sub-10 MHz frequency resolution · Up to 90 dB dynamic range and ultimate ease-of-use. More details · Up to 2.75 THz bandwidth

on terahertz technology and related pro- 1400 · < 10 MHz frequency resolution ducts can be found on www.toptica.com/ technology/technical-tutorials/terahertz.

Terahertz Accessories Ideal for 1200

· Terahertz spectroscopy · Schottky Detectors · Trace gas sensing (high sensitivity & high speed models) · Non-destructive testing · Optomechanics · Hydration monitoring (2-mirror & 4-mirror assemblies · Material research · Reflection head · Industrial quality control 1000 Wavelength [nm] Wavelength Wavelength [nm] Wavelength 800

110000 110000

8800 8800 600

6600

6600 Coverage Diode Lasers Wavelength Tunable

40 4400

Dynamic range [dB] 40 Dynamic range [dB] 400 2200 2200

0 0 0 1 2 3 4 5 6 0.0 0.5 1.0 1.5 2.0 2.5 Frequency [THz] Frequency [THz]

Typical THz spectrum as obtained with time-domain system Typical THz spectrum as obtained with frequency-domain system 200 TeraFlash. TeraScan. 1

0.1 100 1000 [mW] Power 10000 .

50 www.toptica.com [mW] Power www.toptica.com [email protected] Fax: Phone: Germany Graefelfing D-82166 Lochhamer Schlag19 TOPTICA PhotonicsAG www.toptica.com TOPTICA PhotonicsUK United Kingdom&Ireland www.eurolase.ru EuroLase Ltd. Russia www.lastek.com.au Lastek Pty. Ltd. Australia &NewZealand TOPTICA Worldwide +49 8985837200 +49 89858370

Munich Munich www.toptica.com [email protected] Fax: Phone: U.S.A. &CanadaMexico Farmington, NY14425 5847 CountyRoad41 TOPTICA PhotonicsInc www.pretech.com.sg Precision Technologies PteLtd Singapore &MalaysiaThailand www.optonlaser.com Opton LaserInternational France +1 8772779897 +1 5856576663 www.simco-groups.com & SystemsLtd. Simco GlobalTechnology India www.jinsunginst.com JINSUNG INSTRUMENTS,INC. South Korea www.toptica.co.jp [email protected] Fax: Phone: Japan Tokyo 183-0055 1-14-1 Fuchu-cho,Fuchu-shi Asahi-seimei Bldg.2F TOPTICA Photonics,K.K. +81 423069907 +81 423069906

www.toptica-china.com [email protected] Phone: China Huangpu DistrictShanghai,200333 222 EastYanAn Rd Room 1837,BundCentre TOPTICA Photonics(China)Co.,Ltd. www.luxton.com.tw Luxton Inc. Taiwan www.lahat.com Lahat Technologies Ltd. Israel +86 2161933509

BR-199-68A Tunable Diode Lasers 2017-01