Advances in All-Solid-State Passively Q-Switched Lasers Based on Cr4+:YAG Saturable Absorber
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An Application of the Theory of Laser to Nitrogen Laser Pumped Dye Laser
SD9900039 AN APPLICATION OF THE THEORY OF LASER TO NITROGEN LASER PUMPED DYE LASER FATIMA AHMED OSMAN A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Physics. UNIVERSITY OF KHARTOUM FACULTY OF SCIENCE DEPARTMENT OF PHYSICS MARCH 1998 \ 3 0-44 In this thesis we gave a general discussion on lasers, reviewing some of are properties, types and applications. We also conducted an experiment where we obtained a dye laser pumped by nitrogen laser with a wave length of 337.1 nm and a power of 5 Mw. It was noticed that the produced radiation possesses ^ characteristic^ different from those of other types of laser. This' characteristics determine^ the tunability i.e. the possibility of choosing the appropriately required wave-length of radiation for various applications. DEDICATION TO MY BELOVED PARENTS AND MY SISTER NADI A ACKNOWLEDGEMENTS I would like to express my deep gratitude to my supervisor Dr. AH El Tahir Sharaf El-Din, for his continuous support and guidance. I am also grateful to Dr. Maui Hammed Shaded, for encouragement, and advice in using the computer. Thanks also go to Ustaz Akram Yousif Ibrahim for helping me while conducting the experimental part of the thesis, and to Ustaz Abaker Ali Abdalla, for advising me in several respects. I also thank my teachers in the Physics Department, of the Faculty of Science, University of Khartoum and my colleagues and co- workers at laser laboratory whose support and encouragement me created the right atmosphere of research for me. Finally I would like to thank my brother Salah Ahmed Osman, Mr. -
Demonstration of Inp-On-Si Self-Pulsating DFB Laser Diodes for Optical Microwave Generation Volume 9, Number 4, August 2017
Open Access Demonstration of InP-on-Si Self-Pulsating DFB Laser Diodes for Optical Microwave Generation Volume 9, Number 4, August 2017 Keqi Ma M. Shahin, Student Member, IEEE A. Abbasi, Member, IEEE G. Roelkens, Member, IEEE G. Morthier, Senior Member, IEEE DOI: 10.1109/JPHOT.2017.2724840 1943-0655 © 2017 IEEE IEEE Photonics Journal Demonstration of InP-on-Si Self-Pulsating DFB Laser Demonstration of InP-on-Si Self-Pulsating DFB Laser Diodes for Optical Microwave Generation Keqi Ma,1 M. Shahin,2,3 Student Member, IEEE, A. Abbasi,2,3 Member, IEEE, G. Roelkens,2,3 Member, IEEE, and G. Morthier,2,3 Senior Member, IEEE 1Centre for Optical and Electromagnetic Research, State Key Laboratory for Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China 2Photonics Research Group, Department of Information Technology (INTEC), Ghent University–IMEC, Gent B-9000, Belgium 3Center for Nano-and Biophotonics, Ghent University, Gent B-9000, Belgium DOI:10.1109/JPHOT.2017.2724840 1943-0655 C 2017 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. Manuscript received June 9, 2017; revised July 5, 2017; accepted July 5, 2017. Date of publication July 11, 2017; date of current version July 26, 2017. This work was supported by the Methusalem program of the Flemish Government. (Keqi Ma and M. Shahin contributed equally to this work.) Corresponding author: M. Shahin (e-mail: [email protected]). Abstract: We demonstrate self-pulsating heterogeneously integrated III-V-on-SOI two- section distributed feedback laser diodes, with a wide range of self-pulsation frequencies between (but not limited to) 12 and 40 GHz. -
Simultaneous Intensity Profiling of Multiple Laser Beams Using the Bladecam-XHR Camera
Simultaneous Intensity Profiling of Multiple Laser Beams Using the BladeCam-XHR Camera Shaun Pacheco College of Optical Sciences, University of Arizona Rongguang Liang College of Optical Sciences, University of Arizona Rocco Dragone Vice President of Engineering, DataRay, Inc. Real-Time Profiling of Multiple Laser Beams There are several applications where the parallel processing of multiple beams can significantly decrease the overall time needed for the process. Intensity profile measurements that can characterize each of those beams can lead to improvements in that application. If each beam had to be characterized individually, the process would be very time consuming, especially for large numbers of beams. This white paper describes how the BladeCam-XHR can be used to simultaneously measure the intensity profile measurements for multiple beams by measuring the diffraction pattern from a diffraction grating and the intensity profile from a 3x3 fiber array focused using a 0.5 NA objective. Diffraction Gratings Diffraction gratings are periodic optical components that diffract an incident beam into several outgoing beams. The grating profile determines both the angle of the diffracted beam modes and the efficiency of light sent into each of those modes. Grating fabrication errors or a change in the incident wavelength can significantly change the performance of a diffraction grating. The BladeCam- XHR, Figure 1, can be used to measure the point spread function (PSF) of each mode, the relative efficiency of each mode and the spacing between diffraction modes. Figure 1 BladeCam-XHR Using the BladeCam-XHR for Diffraction Grating Evaluation The profiling mode in the DataRay software can be used to evaluate the performance of a diffraction grating. -
Applications of Laser Spectroscopy Constitute a Vast Field, Which Is Difficult to Spectroscopy Cover Comprehensively in a Review
LASERS & OPTICS 151 many cases non-destructively. A variety of beam manipulation schemes are avail able for the irradiation of samples either directly or after preparation. The unique properties of laser radiation in terms of coherence, intensity and directionality permit remote chemical sensing, where the analytical equipment and the sample are separated by large distances, even of several kilometres. Absorption, and in particular differential absorption, can be utilised in long-path measurements, whereas elastic and inelastic backscatter- ing as well as fluorescence can be used for range-resolved radar-like measure ments (LIDAR: light detection and rang ing). Laser light can also be efficiently transported in optical fibres to remotely located measurement sites. Various prop erties of the fibre itself influence the laser light propagating through the fibre, thus Applications of Laser forming a basis for fibre optic sensors. Applications of laser spectroscopy constitute a vast field, which is difficult to Spectroscopy cover comprehensively in a review. Rather than attempting such a review, examples from a variety of fields are cho Costas Fotakis sen for illustrating the power of applied University of Crete, Greece laser spectroscopy. Sune Svanberg Lund Institute of Technology, Sweden Applications in Analytical Chemistry Laser spectroscopy is making a major impact in many traditional fields of ana As the new millennium approaches the Above The Italian research vessel Urania, carrying a lytical spectroscopy. For instance, opto- know how in the field of laser-matter Swedish laser radar system, which has sailed under the galvanic spectroscopy on analytical smoky plumes of Sicilian volcanos in Italy measuring the interactions has matured to the stage of sulphur dioxide content flames increases the sensitivity of enabling several exciting real life applica absorption and emission flame spec tions. -
Hair Reduction by Laser
Ames Locations To Eldora, Iowa Falls, McFarland Clinic North Ames Story City, Urgent Care Webster City Treatment McFarland Clinic (3815 Stange Rd.) Bloomington Road McFarland Clinic Physical Therapy - Somerset West Ames e. (2707 Stange Rd., Suite 102) 24th Street Av f e. Duf Av You should not use any Accutane (a prescribed oral US 69 Ontario Street 13th Street Grand 13th Street acne medication) or gold medications (for arthritis) McFarland Clinic (1215 Duff) MGMC - North Addition for six months prior to a treatment. You should William R. Bliss Cancer Center 12th Street Stange Road . e. Mary Greeley Medical Center (MGMC) McFarland Eye Center not use retinoids (e.g. Retin A, Fifferin, Differin, Av (1111 Duff Ave.) (1128 Duff) e. 11th Street Ramp Av McFarland Family Avita, Tazorac), alpha-hydroxy acid moisturizers, Medicine East Hyland St Medical Arts Building (1018 Duff) To Boone, Carroll I-35 bleaching creams (hydroquinone) or chemical peels Iowa State (1015 Duff) Jefferson N. Dakota Marshall University for two weeks prior to a treatment. Do not pluck the Lincoln Way Lincoln Way Express Care Express Care hairs, wax or use depilatories or electrolysis for six e. (3800 Lincoln Way) (640 Lincoln Way) weeks prior to a treatment. Av McFarland Clinic West Ames Hy-Vee (3600 Lincoln Way) Hy-Vee e. Av ff You may be asked to shave the area prior to your S. Dakota To Nevada, Du first treatment appointment. You may also be Marshalltown prescribed a topical anesthetic (numbing) cream to Highway 30 help reduce any discomfort the laser may cause. Blvd University First Treatment: The laser will be used to treat the N areas by your dermatologist or one of the trained Oakwood Road Airport Road dermatology staff. -
Laser Pointer Safety About Laser Pointers Laser Pointers Are Completely Safe When Properly Used As a Visual Or Instructional Aid
Harvard University Radiation Safety Services Laser Pointer Safety About Laser Pointers Laser pointers are completely safe when properly used as a visual or instructional aid. However, they can cause serious eye damage when used improperly. There have been enough documented injuries from laser pointers to trigger a warning from the Food and Drug Administration (Alerts and Safety Notifications). Before deciding to use a laser pointer, presenters are reminded to consider alternate methods of calling attention to specific items. Most presentation software packages offer screen pointer options with the same features, but without the laser hazard. Selecting a Safe Laser Pointer 1) Choose low power lasers (Class 2) Whenever possible, select a Class 2 laser pointer because of the lower risk of eye damage. 2) Choose red-orange lasers (633 to 650 nm wavelength, choose closer to 635 nm) The National Institute of Standards and Technology (NIST) researchers found that some green laser pointers can emit harmful levels of infrared radiation. The green laser pointers create green light beam in a three step process. A standard laser diode first generates near infrared light with a wavelength of 808nm, and pumps it into a ND:YVO4 crystal that converts the 808 nm light into infrared with a wavelength of 1064 nm. The 1064 nm light passes into a frequency doubling crystal that emits green light at a wavelength of 532nm finally. In most units, a combination of coatings and filters keeps all the infrared energy confined. But the researchers found that really inexpensive green lasers can lack an infrared filter altogether. One tested unit was so flawed that it released nine times more infrared energy than green light. -
Restricted Energy Transfer in Laser Desorption of High Molecular Weight Biomolecules
Scanning Microscopy Volume 5 Number 2 Article 3 4-20-1991 Restricted Energy Transfer in Laser Desorption of High Molecular Weight Biomolecules Akos Vertes University of Antwerp, Belgium, [email protected] Renaat Gijbels University of Antwerp, Belgium Follow this and additional works at: https://digitalcommons.usu.edu/microscopy Part of the Biology Commons Recommended Citation Vertes, Akos and Gijbels, Renaat (1991) "Restricted Energy Transfer in Laser Desorption of High Molecular Weight Biomolecules," Scanning Microscopy: Vol. 5 : No. 2 , Article 3. Available at: https://digitalcommons.usu.edu/microscopy/vol5/iss2/3 This Article is brought to you for free and open access by the Western Dairy Center at DigitalCommons@USU. It has been accepted for inclusion in Scanning Microscopy by an authorized administrator of DigitalCommons@USU. For more information, please contact [email protected]. Scanning Microscopy, Vol. 5, No. 2, 1991 (Pages 317-328) 0891-7035/91$3.00+ .00 Scanning Microscopy International, Chicago (AMF O'Hare), IL 60666 USA RESTRICTED ENERGY TRANSFER IN LASER DESORPTION OF HIGH MOLECULAR WEIGHT BIOMOLECULES Akos Vertes* and Renaat Gijb els Departm ent of Chemistry, University of Antwerp (U.I.A.), Universiteitsplein 1, B-2610 Wilrijk (Belgium) (Received for publication November 15, 1990, and in revised form April 20, 1991) Abstract Introdu ction Producing ions from large molecules is of distin With the growing importan ce of biomedical investi guished importance in mass spectrometry. In our present gations in organic analysis the emphasis has been shift study we survey different laser desorption methods in ing to the detection and structure determination of ever view of their virtues and drawbacks in volatilization and larg er and more complex molecules. -
Ultrafast Fiber Lasers Enabled by Highly Nonlinear Pulse Evolutions
ULTRAFAST FIBER LASERS ENABLED BY HIGHLY NONLINEAR PULSE EVOLUTIONS A Dissertation Presented to the Faculty of the Graduate School of Cornell University in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy by Walter Pupin Fu August 2019 c 2019 Walter Pupin Fu ALL RIGHTS RESERVED ULTRAFAST FIBER LASERS ENABLED BY HIGHLY NONLINEAR PULSE EVOLUTIONS Walter Pupin Fu, Ph.D. Cornell University 2019 Ultrafast lasers have had tremendous impact on both science and applications, far beyond what their inventors could have imagined. Commercially-available solid-state lasers can readily generate coherent pulses lasting only a few tens of femtoseconds. The availability of such short pulses, and the huge peak in- tensities they enable, has allowed scientists and engineers to probe and manip- ulate materials to an unprecedented degree. Nevertheless, the scope of these advances has been curtailed by the complexity, size, and unreliability of such devices. For all the progress that laser science has made, most ultrafast lasers remain bulky, solid-state systems prone to misalignments during heavy use. The advent of fiber lasers with capabilities approaching that of traditional, solid-state lasers offers one means of solving these problems. Fiber systems can be fully integrated to be alignment-free, while their waveguide structure en- sures nearly perfect beam quality. However, these advantages come at a cost: the tight confinement and long interaction lengths make both linear and non- linear effects significant in shaping pulses. Much research over the past few decades has been devoted to harnessing and managing these effects in the pur- suit of fiber lasers with higher powers, stronger intensities, and shorter pulse durations. -
Wavelength-Tunable Ion Laser Systems
38Ch_AirCooledIonLsrs_f_v3.qxd 6/8/2005 11:19 AM Page 38.4 Diode-Pumped Solid-State Lasers Wavelength-Tunable Ion Laser Systems $ Selectable wavelengths ranging from violet to red SPECIFICATIONS: Air-Cooled Ion Lasers Air-Cooled $ Output power to 195 mW WAVELENGTH-TUNABLE ION LASER SYSTEMS $ Highest output power for its size Transverse Mode : TEM00 (except as noted) Longitudinal Mode Spacing : $ Switching power supplies with power-factor correction 35 (X)AP 321: 469 MHz $ CE, IEC, and CDRH compliant 35 (X)AP 431: 349 MHz These air-cooled ion laser systems are compact devices that pro- Coherence Length : ~10 cm duce high-quality, linearly polarized output that can be tuned over Polarization : Linear (vertical85°) with >250:1 extinction ratio a wide variety of wavelengths. The 35 LAP 321 and 35 MAP 321 are Pointing Stability : <30 mrad°C extremely compact argon-ion lasers, less than 15 inches in length Power Stability : 80.5% over a 2-hour period (excluding cables). The somewhat longer 35 LAP 431 and Optical Noise (%p-p @ <100 kHz / <1 MHz) : 35 MAP 431 are argon-ion lasers that produce as much as 195 mW Argon: 488 nm, 4 / 6; 514 nm, 4 / 6 Helium Cadmium Lasers multimode and up to 130 mW with a clean Gaussian TEM00 mode. Argon/Krypton: 488 nm, 5 / 7; 514 nm, 6 / 10; The model 35 KAP 431 is a mixed-gas (argon/krypton) laser with 568 nm, 3 / 6; 647 nm, 5 / 8 nine selectable wavelengths ranging from 476 nm (violet) to 676 nm Warm-up Time : <15 minutes from cold start (red). -
Argon-Ion and Helium-Neon Lasers
Argon-Ion and Helium- Neon Lasers The one source for gas lasers What makes Lumentum the choice for argon-ion and helium-neon (HeNe) lasers? Whether you are involved in medical research, semiconductor manufacturing, high-speed printing, or Your Source for another demanding application, we have the expertise, commitment, and technology to ensure you get the best solution for your need. With more than 35 years of experience, we have an unmatched Successful gas laser production requires extraordinary care understanding of the gas laser market. That understanding has during the manufacturing process. Every individual throughout led us to devote extensive resources to help establish a premier, each production stage, from engineering and procurement to Gas Lasers high-volume manufacturing facility. Located in Thailand, the manufacturing and quality control, is attuned to the highly facility produces lasers of the highest standard. And we maintain sensitive nature of the applications for which these products are that standard through regional quality management, on-site used. Consequently, we can assure the steady supply of quality supplier quality engineering, and regular quality audits. products to our customers around the globe. Our products are being used in customers’ new systems and as replacement components in the large installed base of existing systems. 2 3 Key Gas Laser Applications Known for their longevity and predictable electrical and optical performance characteristics, our lasers are being used in a wide variety of applications. Medical Research University, medical, and government laboratories on the cusp of new discoveries rely on instruments designed with Lumentum argon-ion and HeNe lasers for cell mapping, genome analysis, and DNA sequencing. -
Population Inversion X-Ray Laser Oscillator
Population inversion X-ray laser oscillator Aliaksei Halavanaua, Andrei Benediktovitchb, Alberto A. Lutmanc , Daniel DePonted, Daniele Coccoe , Nina Rohringerb,f, Uwe Bergmanng , and Claudio Pellegrinia,1 aAccelerator Research Division, SLAC National Accelerator Laboratory, Menlo Park, CA 94025; bCenter for Free Electron Laser Science, Deutsches Elektronen-Synchrotron, Hamburg 22607, Germany; cLinac & FEL division, SLAC National Accelerator Laboratory, Menlo Park, CA 94025; dLinac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025; eLawrence Berkeley National Laboratory, Berkeley, CA 94720; fDepartment of Physics, Universitat¨ Hamburg, Hamburg 20355, Germany; and gStanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA 94025 Contributed by Claudio Pellegrini, May 13, 2020 (sent for review March 23, 2020; reviewed by Roger Falcone and Szymon Suckewer) Oscillators are at the heart of optical lasers, providing stable, X-ray free-electron lasers (XFELs), first proposed in 1992 transform-limited pulses. Until now, laser oscillators have been (8, 9) and developed from the late 1990s to today (10), are a rev- available only in the infrared to visible and near-ultraviolet (UV) olutionary tool to explore matter at the atomic length and time spectral region. In this paper, we present a study of an oscilla- scale, with high peak power, transverse coherence, femtosecond tor operating in the 5- to 12-keV photon-energy range. We show pulse duration, and nanometer to angstrom wavelength range, that, using the Kα1 line of transition metal compounds as the but with limited longitudinal coherence and a photon energy gain medium, an X-ray free-electron laser as a periodic pump, and spread of the order of 0.1% (11). -
Air-Cooled Argon-Ion Laser Heads in Cylindrical Package 2213 Series
Air-Cooled Argon-Ion Laser Heads in Cylindrical Package 2213 Series www.lumentum.com Data Sheet Air-Cooled Argon-Ion Laser Heads in Cylindrical Package Lumentum’s air-cooled argon lasers are designed for complex, high-resolution OEM applications such as flow cytometry, DNA sequencing, graphic arts, and semiconductor inspection. Symmetric design and axial airflow in the cylindrical argon ion Key Features laser heads provide the best mechanical package to ensure • Integral-mirror, metal-ceramic construction optimum beam-pointing stability and fast warm-up. Both initial • Hands-off operation installation and routine maintenance are straightforward due to • Ultralow noise tight production control of optical and mechanical tolerances. Blower-induced mechanical vibration is virtually eliminated • Fast warm-up through the use of flexible ducting between the laser head and • Rugged construction blower assembly. • Vibration isolation • Ultrastable resonator and beam pointing Applications • DNA sequencing • Flow cytometry • Confocal microscopy • Semiconductor inspection • Hematology • High-speed printing • Photo processing Compliance • CE per specification EN55011 and EN50082-2 • UL 1950 and 1262 • CDRH 21 CFR 1040.10 • CUL • EN60825-2 • EN60950, IEC 950 and EN61010 www.lumentum.com 2 Air-Cooled Argon-Ion Laser Heads in Cylindrical Package 2213 Series Cylindrical Head (Specifications in inches unless otherwise noted. E-vector is aligned with the umbilical cable.) 11.5 5.37 72.0 MOUNTING AIR INTAKE AREAS 3.88 BEAM AIR .50 OUTPUT EXHAUST 1.0 4X 4-40