Lasers As Weapons Y 9 Fictional Predictions Y 10 See Also Y 11 Notes and References Y 12 Further Reading Y 13 External Links
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Call for Access to the LULI Laser Facilities
Call for Access to the LULI laser facilities Application for beam time on the LULI laser facilities will soon be open for the period May 2013 – April 2014. The closing date will be the 3rd of October, 2012. BRIEF DESCRIPTION OF THE LULI LASER FACILITIES AVAILABLE IN 2013 ELFIE is a highly versatile and manageable facility coupling a fully-equipped experimental room with a Ti:Sa/mixed glass laser system based on the chirped pulse amplification (CPA) technique. Two ultra-intense vacuum-compressed beams (~15J in typically 0.35ps at ω or 1.06 µm - 2 ω available) are optically synchronized with a ~60J / 600ps uncompressed chirped pulse. A 100mJ short (0.3ps) frequency-converted (from ω to 4 ω) probe beam is also available. Shot-to-shot reliability (at a repetition rate of 1 shot every 20 minutes) and good focused beam quality is ensured through an adaptive-optics closed-loop system. Reduced flexibility in terms of angles between the various laser beams is offered (see graph below). LULI2000 is one of the most energetic laser facilities in Europe: it consists of two experimental areas and a laser hall (below) containing 2 high-power single pulse neodymium glass laser chains. Each beam can deliver up to 1kJ at ω in 1.5ns square pulses ( nano2000 configuration). Pulse duration [from 0.5 to 5ns - rise time ~150ps, pulse shaping available], beam delay [±10ns] and angle can be readily adjusted. 2 ω is available (3 ω upon request). The repetition rate is limited to 1 shot every 90 minutes (4-5 full-energy shots per day), but a 10Hz laser beam allows fast diagnostics alignment. -
Beam Profile Characterisation of an Optoelectronic Silicon Lens
applied sciences Article Beam Profile Characterisation of an Optoelectronic Silicon Lens-Integrated PIN-PD Emitter between 100 GHz and 1 THz Jessica Smith 1,2, Mira Naftaly 2,* , Simon Nellen 3 and Björn Globisch 3,4 1 ATI, University of Surrey, Guildford GU2 7XH, UK; [email protected] 2 National Physical Laboratory, Teddington TW11 0LW, UK 3 Fraunhofer Institute for Telecommunication, Heinrich Hertz Institute, Einsteinufer 37, 10587 Berlin, Germany; [email protected] (S.N.); [email protected] (B.G.) 4 Institute of Solid State Physics, Technical University Berlin, Hardenbergstr. 36, 10623 Berlin, Germany * Correspondence: [email protected] Featured Application: This paper can be an important starting point for establishing beam profile measurements as an essential characterization tool for terahertz emitters. Abstract: Knowledge of the beam profiles of terahertz emitters is required for the design of tera- hertz instruments and applications, and in particular for designing terahertz communications links. We report measurements of beam profiles of an optoelectronic silicon lens-integrated PIN-PD emitter at frequencies between 100 GHz and 1 THz and observe significant deviations from a Gaussian beam profile. The beam profiles were found to differ between the H-plane and the E-plane, and to vary strongly with the emitted frequency. Skewed profiles and irregular side-lobes were observed. Metrological aspects of beam profile measurements are discussed and addressed. Keywords: terahertz; emitters; beam profile Citation: Smith, J.; Naftaly, M.; Nellen, S.; Globisch, B. Beam Profile Characterisation of an Optoelectronic 1. Introduction Silicon Lens-Integrated PIN-PD In recent years, continuous-wave (CW) Terahertz (THz) radiation has become a promis- Emitter between 100 GHz and 1 THz. -
Nonlinear Optical Processes for Spectral Broadening and Short Pulse Generation Hongyu Hu University of Connecticut, [email protected]
University of Connecticut OpenCommons@UConn Doctoral Dissertations University of Connecticut Graduate School 1-13-2017 Nonlinear Optical Processes for Spectral Broadening and Short Pulse Generation Hongyu Hu University of Connecticut, [email protected] Follow this and additional works at: https://opencommons.uconn.edu/dissertations Recommended Citation Hu, Hongyu, "Nonlinear Optical Processes for Spectral Broadening and Short Pulse Generation" (2017). Doctoral Dissertations. 1353. https://opencommons.uconn.edu/dissertations/1353 Nonlinear Optical Processes for Spectral Broadening and Short Pulse Generation Hongyu Hu, PhD University of Connecticut, 2017 The dramatic progress in optical communication is attributed to the development of wavelength- division multiplexing and time-division multiplexing technologies, which employ broadband light source and ultrashort optical pulses respectively to carry signals in optical fibers. Supercontinuum generation is the spectral broadening of narrow-band incident pulses by the propagation through optical waveguides made of nonlinear materials. In this PhD dissertation, I show the design of a tapered lead-silicate optical fiber for supercontinuum generation. The physical mechanisms of optical pulse evolution are explained, which involve various nonlinear optical effects including self-phase and cross-phase modulation, stimulated Raman scattering, four-wave mixing, modulation instability and optical soliton dynamics. I have also proposed planar waveguides with longitudinally varying structure to manage chromatic dispersion, and numerically simulated the generation of (1) broadband and (2) flat octave-spanning supercontinuum output. The coherence property and noise sensitivity of supercontinuum are also investigated in this dissertation, which depend strongly on pumping conditions. A hybrid mode- locked erbium-doped fiber ring laser, which combines rational harmonic active mode-locking technique and graphene saturable absorber, has been designed and experimentally demonstrated to produce optical pulse train. -
Beam Profiling by Michael Scaggs
Beam Profiling by Michael Scaggs Haas Laser Technologies, Inc. Introduction Lasers are ubiquitous in industry today. Carbon Dioxide, Nd:YAG, Excimer and Fiber lasers are used in many industries and a myriad of applications. Each laser type has its own unique properties that make them more suitable than others. Nevertheless, at the end of the day, it comes down to what does the focused or imaged laser beam look like at the work piece? This is where beam profiling comes into play and is an important part of quality control to ensure that the laser is doing what it intended to. In a vast majority of cases the laser beam is simply focused to a small spot with a simple focusing lens to cut, scribe, etch, mark, anneal, or drill a material. If there is a problem with the beam delivery optics, the laser or the alignment of the system, this problem will show up quite markedly in the beam profile at the work piece. What is Beam Profiling? Beam profiling is a means to quantify the intensity profile of a laser beam at a particular point in space. In material processing, the "point in space" is at the work piece being treated or machined. Beam profiling is accomplished with a device referred to a beam profiler. A beam profiler can be based upon a CCD or CMOS camera, a scanning slit, pin hole or a knife edge. In all systems, the intensity profile of the beam is analyzed within a fixed or range of spatial Haas Laser Technologies, Inc. -
Platinum Sponsor
We like to thank the Department of Biotechnology (Government of India) for financial support. We like to thank our sponsors for financial support: Platinum Sponsor: Gold Sponsor: Silver Sponsors: And Program Date Venue Timings Title OF MUSIC, MATH AND MEASUREMENT LH1 6pm M.W. Linscheid, Humbold Universitaet Berlin, Germany Dining Mixer 23/08 7pm Complex Concert by Ananth Menon Quartet Dining 8pm Dinner Complex LH1 9:00am Tutorial I MASS SPECTROMETRIC ESSENTIALS IN OMICS RESEARCH D.Schwudke LH1 9:30am Session I / Proteomics (Chair D. Schwud ke) MASS SPECTROMETRIC IDENTIFICATION OF A NOVEL TRANS- SPLICING EVENT IN GIARDIA LAMBLIA HEAT SHOCK PROTEIN 90 U.S. Tatu, IISC Bangalore, India REVISITING PROTEOMICS OF GLIOMAS: DIFFERENTIAL MEMBRANE PROTEINS AND MOLECULAR INSIGHTS R. Sirdeshmukh, IOB Bangalore, India NEW HIGH SELECTIVITY WORKFLOWS FOR TARGETED QUANTITATIVE PROTEOMICS 24/08 M. Cafazzo, AB Sciex, US Break ABSOLUTE QUANTIFICATION OF PROTEINS AND PEPTIDES - USE OF METAL CODING AND LC/MS WITH ICP AND ELECTROSPRAY M.W. Linscheid, Humbold Universitaet Berlin, Germany MATERNAL VITAMIN B12 DEFICIENCY INDUCED ALTERATION IN PROTEIN EXPRESSION IN RAT OFFSPRING S. Sengupta, IGIB New Dehli, India CLINICAL PROTEOMICS OF EYE DISEASES K. Dharmalingam, Madurai Kamaraj University, India Dining 1pm Lunch Complex Ope n 2pm Poster Session I Deck Date Venue Timings Title LH1 4pm Session II / Lipidomics (Chair S. Hebbar ) TOWARDS THE COMPLETE STRUCTURE ELUCIDATION OF COMPLEX LIPIDS BY MASS SPECTROMETRY: NOVEL APPROACHES TO ION ACTIVATION S. Blanksby et al., University of Wollongong, Australia LIPIDOMICS AT THE HIGH MASS RESOLUTION A. Shevchenko, MPI-CBG Dresden, Germany STRATEGIES FOR IMAGING BIOMOLECULES BY TOF-SIMS AND MALDI-TOF/TOF MASS SPECTROMETRY O. -
Petawatt and Exawatt Class Lasers Worldwide
Petawatt and exawatt class lasers worldwide Colin Danson, Constantin Haefner, Jake Bromage, Thomas Butcher, Jean-Christophe Chanteloup, Enam Chowdhury, Almantas Galvanauskas, Leonida Gizzi, Joachim Hein, David Hillier, et al. To cite this version: Colin Danson, Constantin Haefner, Jake Bromage, Thomas Butcher, Jean-Christophe Chanteloup, et al.. Petawatt and exawatt class lasers worldwide. High Power Laser Science and Engineering, Cambridge University Press, 2019, 7, 10.1017/hpl.2019.36. hal-03037682 HAL Id: hal-03037682 https://hal.archives-ouvertes.fr/hal-03037682 Submitted on 3 Dec 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. High Power Laser Science and Engineering, (2019), Vol. 7, e54, 54 pages. © The Author(s) 2019. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/ licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. doi:10.1017/hpl.2019.36 Petawatt and exawatt class lasers worldwide Colin N. Danson1;2;3, Constantin Haefner4;5;6, Jake Bromage7, Thomas Butcher8, Jean-Christophe F. Chanteloup9, Enam A. Chowdhury10, Almantas Galvanauskas11, Leonida A. -
Chapter 2 HISTORY and DEVELOPMENT of MILITARY LASERS
History and Development of Military Lasers Chapter 2 HISTORY AND DEVELOPMENT OF MILITARY LASERS JACK B. KELLER, JR* INTRODUCTION INVENTING THE LASER MILITARIZING THE LASER SEARCHING FOR HIGH-ENERGY LASER WEAPONS SEARCHING FOR LOW-ENERGY LASER WEAPONS RETURNING TO HIGHER ENERGIES SUMMARY *Lieutenant Colonel, US Army (Retired); formerly, Foreign Science Information Officer, US Army Medical Research Detachment-Walter Reed Army Institute of Research, 7965 Dave Erwin Drive, Brooks City-Base, Texas 78235 25 Biomedical Implications of Military Laser Exposure INTRODUCTION This chapter will examine the history of the laser, Military advantage is greatest when details are con- from theory to demonstration, for its impact upon the US cealed from real or potential adversaries (eg, through military. In the field of military science, there was early classification). Classification can remain in place long recognition that lasers can be visually and cutaneously after a program is aborted, if warranted to conceal hazardous to military personnel—hazards documented technological details or pathways not obvious or easily in detail elsewhere in this volume—and that such hazards deduced but that may be relevant to future develop- must be mitigated to ensure military personnel safety ments. Thus, many details regarding developmental and mission success. At odds with this recognition was military laser systems cannot be made public; their the desire to harness the laser’s potential application to a descriptions here are necessarily vague. wide spectrum of military tasks. This chapter focuses on Once fielded, system details usually, but not always, the history and development of laser systems that, when become public. Laser systems identified here represent used, necessitate highly specialized biomedical research various evolutionary states of the art in laser technol- as described throughout this volume. -
Quanta-Ray Lab-Series Pulsed Nd:YAG Lasers
Quanta-Ray Lab-Series Pulsed Nd:YAG Lasers User’s Manual 1335 Terra Bella Avenue Mountain View, CA 94043 Part Number 0000-311A, Rev. A June 2003 Preface This manual contains information you need in order to safely install, align, operate, maintain and service your Quanta-Ray Lab-Series pulsed Nd:YAG laser on a day-to-day basis. Also described is the installation and operation of the HG harmonic generator and IHS internal harmonic separator. The system comprises three main elements: the Lab-Series laser head, the power supply and a table-top controller. (The system can also be controlled remotely via the front panel RS-232 serial port.) An optional Model WA-1 heat exchanger may also be present. The “Introduction” contains a brief description of these three components and is followed by an important chapter on laser safety. The Lab-Series is a Class IV laser and, as such, emits laser radiation which can permanently damage eyes and skin, ignite fires and vaporize substances. Moreover, focused back-reflections of even a small percentage of its output energy can destroy expensive internal optical components. This section contains information about these hazards and offers suggestions on how to safe- guard against them. To minimize the risk of injury or expensive repairs, be sure to read this chapter—then carefully follow these instructions. This chapter also contains information regarding system compliance to CDRH and CE regulations. “Laser Description” contains a short section on laser theory regarding the Nd:YAG crystal rods that are used in the Lab-Series laser. Also included is a discussion of the second, third and fourth harmonic laser output gener- ated by the system. -
Endomicroscopic Optical Coherence Tomography for Cellular Resolution Imaging of Gastrointestinal Tracts
This document is downloaded from DR‑NTU (https://dr.ntu.edu.sg) Nanyang Technological University, Singapore. Endomicroscopic optical coherence tomography for cellular resolution imaging of gastrointestinal tracts Luo, Yuemei; Cui, Dongyao; Yu, Xiaojun; Bo, En; Wang, Xianghong; Wang, Nanshuo; Braganza, Cilwyn S.; Chen, Shufen; Liu, Xinyu; Xiong, Qiaozhou; Chen, Si; Chen, Shi; Liu, Linbo 2017 Luo, Y., Cui, D., Yu, X., Bo, E., Wang, X., Wang, N., et al. (2018). Endomicroscopic optical coherence tomography for cellular resolution imaging of gastrointestinal tracts. Journal of Biophotonics, in press. https://hdl.handle.net/10356/87066 https://doi.org/10.1002/jbio.201700141 © 2017 WILEY‑VCH Verlag GmbH & Co. KGaA, Weinheim. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Biophotonics, WILEY‑VCH Verlag GmbH & Co. KGaA, Weinheim. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1002/jbio.201700141]. Downloaded on 23 Sep 2021 21:52:50 SGT Article type: Full Article Endomicroscopic optical coherence tomography for cellular resolution imaging of gastrointestinal tracts Yuemei Luo1, Dongyao Cui1, Xiaojun Yu1, En Bo1, Xianghong Wang1, Nanshuo Wang1, Cilwyn Shalitha Braganza1, Shufen Chen1, Xinyu Liu1, Qiaozhou Xiong1, Si Chen1, Shi Chen1, and Linbo Liu1,2 ,* *Corresponding Author: E-mail: [email protected] 150 Nanyang Ave, School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore 262 Nanyang Dr, School of Chemical and Biomedical Engineering, Nanyang Technological University, 637459, Singapore Keywords: Optical coherence tomography, Endoscopic imaging, Fiber optics Imaging, Medical and biological imaging, Gastrointestinal tracts Short title: Y. -
Litron LPY10J Specifications
Litron Ultra High Energy Lasers General Features • Up to 10J at 1064nm • Up to 5J at 532nm • Telescopic or Super-Gaussian coupled resonators • Birefringence compensation • Rugged industrial build • Optional seeder package LPY10J • 3rd and 4th harmonics available • Full RS232 software control Ultra High Energy Pulsed Nd:YAG Laser and LabVIEW™ drivers The LPY10J laser systems offer Q-switched output energies of 10 Joules at 1064nm from a proven design platform. The self-supporting invar frame has been utilised for many years in industrial and scientific applications where Applications robustness and stability are paramount. • Ti:Sa pumpimg • Shot peening In addition to the standard configuration, there are several options available; injection seeder to provide a narrow linewidth, harmonic generation units to • LIBS provide outputs up to the 4th harmonic, automated wavelength selection, • Holography energy monitoring and automatic output peaking and continuous tracking. • Plasma physics TECHNICAL DATA Resonator Type GRM Stable Telescopic Model LPYG 10J-1 LPYG 10J-5 LPYST 10J-1 LPYST 10J-5 Repetition Rate (Hz) 1 5 1 5 Output Energy (J) (1a) 1064nm 10 10 10 10 532nm 5 5 5 5 355nm (1b) 2.5 2.5 2.5 2.5 266nm 0.8 0.8 0.8 0.8 Telescopic stable beam profile at 5J, 532nm, 5Hz. Pulse Stability (±%) (2) 1064nm <2 <2 <2 <2 532nm <4 <4 <4 <4 355nm <6 <6 <6 <6 266nm <10 <10 <10 <10 Pulse Length (ns) (3) 1064nm 7-11 7-11 20-22 20-22 532nm 7-11 7-11 20-22 20-22 355nm 6-10 6-10 19-21 19-21 266nm 5-9 5-9 18-20 18-20 Pulsewidth at 5J, 532nm, 5Hz. -
Midwinter 2005 ISSN 1534-0937 Walt Crawford
Cites & Insights Crawford at Large Libraries • Policy • Technology • Media Sponsored by YBP Library Services Volume 5, Number 2: Midwinter 2005 ISSN 1534-0937 Walt Crawford $20-$25 of 256MB for $40-$50 may be more Trends & Quick Takes typical. With XP computers typically having front-mounted USB slots, the primary setup The Hazy Crystal Ball requirement is security. It’s that time of year—time for pundits and gurus to ¾ Wireless Access: “Providing wireless access tell us what’s to come and for a few of them to spin frees up your public access computing termi- last year’s projections. nals for those who truly need them, and I was going to include snarky comments (or cred- makes your library the neighborhood ‘hot- its, when applicable) about last year’s forecasts—but I spot’ for information access.” see that last year got so confusing that I never ran a ¾ Thin Clients::: “Thin-client technology en- set of forecasts. Neither did I make one: That should ables you to extend the life of your existing be no surprise. computers, lower costs on expanding the number of patron terminals, and simplify WebJunction’s Emerging technologies maintenance procedures.” for small libraries ¾ Upgrading Your Operating Systems: “Tech- You could think of this as a counterpart to the LITA Soup Stock offers upgrades to Windows XP Top Technology Trends group, but with fewer partici- for $8 (libraries are eligible)…” The text calls pants (eight in the October 4 posting) and a small- Windows 2000 and 95 “antiquated.” library bent. The committee develops a quarterly “list of five technologies they think are worth considering Inside This Issue for your library.” I like the guidelines: “The committee Bibs & Blather.................................................................... -
A Laser (From the Acronym Light Amplification by Stimulated Emission of Radiation) Is an Optical Source That Emits Photons in a Coherent Beam
LASER A laser (from the acronym Light Amplification by Stimulated Emission of Radiation) is an optical source that emits photons in a coherent beam. The verb to lase means "to produce coherent light" or possibly "to cut or otherwise treat with coherent light", and is a back- formation of the term laser. Laser light is typically near-monochromatic, i.e. consisting of a single wavelength or color, and emitted in a narrow beam. This is in contrast to common light sources, such as the incandescent light bulb, which emit incoherent photons in almost all directions, usually over a wide spectrum of wavelengths. Laser action is explained by the theories of quantum mechanics and thermodynamics. Many materials have been found to have the required characteristics to form the laser gain medium needed to power a laser, and these have led to the invention of many types of lasers with different characteristics suitable for different applications. The laser was proposed as a variation of the maser principle in the late 1950's, and the first laser was demonstrated in 1960. Since that time, laser manufacturing has become a multi- billion dollar industry, and the laser has found applications in fields including science, industry, medicine, and consumer electronics. Contents [hide] 1 Physics 2 History 2.1 Recent innovations 3 Uses 3.1 Popular misconceptions 3.2 "LASER" 3.3 Scientific misconceptions 4 Laser safety 5 Categories 5.1 By type 5.2 By output power 6 See also 7 Further reading 7.1 Books 7.2 Periodicals 8 References 9 External links [edit] Physics See also: Laser science Principal components: 1.