Download or read book AlGaAs Heterojunction Lasers written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-11-19 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The characterization of 8300 A lasers was broadened, especially in the area of beam quality. Modulation rates up to 2 Gbit/sec at output powers of 20 mW were observed, waveform fidelity was fully adequate for low BER data transmission, and wavefront measurements showed that phase aberrations were less than lamda/50. Also, individually addressable arrays of up to ten contiguous diode lasers were fabricated and tested. Each laser operates at powers up to 30 mW CW in single spatial mode. Shifting the operating wavelength of the basic CSP laser from 8300 A to 8650 A was accomplished by the addition of Si to the active region. Output power has reached 100 mW single mode, with excellent far field wave front properties. Operating life is currently approx. 1000 hrs at 35 mW CW. In addition, laser reliability, for operation at both 8300 A and 8650 A, has profited significantly from several developments in the processing procedures. Goldstein, B. and Pultz, G. N. and Carlin, D. B. and Slavin, S. E. and Ettenberg, M. ALUMINUM GALLIUM ARSENIDES; GALLIUM ARSENIDE LASERS; HETEROJUNCTION DEVICES; SEMICONDUCTOR DIODES; LASER OUTPUTS; PHASE LOCKED SYSTEMS; PHASE MODULATION; PHASED ARRAYS...
Download or read book AlGaAs Heterojunction Lasers written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: The characterization of 8300 A lasers was broadened, especially in the area of beam quality. Modulation rates up to 2 Gbit/sec at output powers of 20 mW were observed, waveform fidelity was fully adequate for low BER data transmission, and wavefront measurements showed that phase aberrations were less than lamda/50. Also, individually addressable arrays of up to ten contiguous diode lasers were fabricated and tested. Each laser operates at powers up to 30 mW CW in single spatial mode. Shifting the operating wavelength of the basic CSP laser from 8300 A to 8650 A was accomplished by the addition of Si to the active region. Output power has reached 100 mW single mode, with excellent far field wave front properties. Operating life is currently approx. 1000 hrs at 35 mW CW. In addition, laser reliability, for operation at both 8300 A and 8650 A, has profited significantly from several developments in the processing procedures. Goldstein, B. and Pultz, G. N. and Carlin, D. B. and Slavin, S. E. and Ettenberg, M. Unspecified Center ALUMINUM GALLIUM ARSENIDES; GALLIUM ARSENIDE LASERS; HETEROJUNCTION DEVICES; SEMICONDUCTOR DIODES; LASER OUTPUTS; PHASE LOCKED SYSTEMS; PHASE MODULATION; PHASED ARRAYS...
Download or read book AlGaAs Heterojunction Lasers written by B. Goldstein and published by . This book was released on 1988 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AlGaAs Heterojunction Lasers written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies of Single mode Injection Lasers and of Quaternary Materials Volume 1 Single mode Constricted Double heterojunction AlGaAs Diode Lasers written by Dan Botez and published by . This book was released on 1982 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Semiconductor Laser Engineering Reliability and Diagnostics written by Peter W. Epperlein and published by John Wiley & Sons. This book was released on 2013-01-25 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference book provides a fully integrated novel approach to the development of high-power, single-transverse mode, edge-emitting diode lasers by addressing the complementary topics of device engineering, reliability engineering and device diagnostics in the same book, and thus closes the gap in the current book literature. Diode laser fundamentals are discussed, followed by an elaborate discussion of problem-oriented design guidelines and techniques, and by a systematic treatment of the origins of laser degradation and a thorough exploration of the engineering means to enhance the optical strength of the laser. Stability criteria of critical laser characteristics and key laser robustness factors are discussed along with clear design considerations in the context of reliability engineering approaches and models, and typical programs for reliability tests and laser product qualifications. Novel, advanced diagnostic methods are reviewed to discuss, for the first time in detail in book literature, performance- and reliability-impacting factors such as temperature, stress and material instabilities. Further key features include: practical design guidelines that consider also reliability related effects, key laser robustness factors, basic laser fabrication and packaging issues; detailed discussion of diagnostic investigations of diode lasers, the fundamentals of the applied approaches and techniques, many of them pioneered by the author to be fit-for-purpose and novel in the application; systematic insight into laser degradation modes such as catastrophic optical damage, and a wide range of technologies to increase the optical strength of diode lasers; coverage of basic concepts and techniques of laser reliability engineering with details on a standard commercial high power laser reliability test program. Semiconductor Laser Engineering, Reliability and Diagnostics reflects the extensive expertise of the author in the diode laser field both as a top scientific researcher as well as a key developer of high-power highly reliable devices. With invaluable practical advice, this new reference book is suited to practising researchers in diode laser technologies, and to postgraduate engineering students.
Download or read book Laser Fundamentals written by William T. Silfvast and published by Cambridge University Press. This book was released on 2008-07-21 with total page 999 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser Fundamentals provides a clear and comprehensive introduction to the physical and engineering principles of laser operation and design. Simple explanations, based throughout on key underlying concepts, lead the reader logically from the basics of laser action to advanced topics in laser physics and engineering. Much new material has been added to this second edition, especially in the areas of solid-state lasers, semiconductor lasers, and laser cavities. This 2004 edition contains a new chapter on laser operation above threshold, including extensive discussion of laser amplifiers. The clear explanations, worked examples, and many homework problems will make this book invaluable to undergraduate and first-year graduate students in science and engineering taking courses on lasers. The summaries of key types of lasers, the use of many unique theoretical descriptions, and the extensive bibliography will also make this a valuable reference work for researchers.
Download or read book Diode Laser Arrays written by Dan Botez and published by Cambridge University Press. This book was released on 2005-11-24 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the fundamental principles and applications of semiconductor diode laser arrays. All of the major types of arrays are discussed in detail, including coherent, incoherent, edge- and surface-emitting, horizontal- and vertical-cavity, individually addressed, lattice- matched and strained-layer systems. The initial chapters cover such topics as lasers, amplifiers, external-cavity control, theoretical modeling, and operational dynamics. Spatially incoherent arrays are then described in detail, and the uses of vertical-cavity surface emitter and edge-emitting arrays in parallel optical-signal processing and multi-channel optical recording are discussed. Researchers and graduate students in solid state physics and electrical engineering studying the properties and applications of such arrays will find this book invaluable.
Download or read book Quasi cw Photopumping of ALGaAs Heterostructure Lasers written by Jimmie Lee Russell and published by . This book was released on 1983 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book GaAs AlGaAs Heterojunction a Promising Detector for Infrared Radiation written by and published by . This book was released on 1909 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report our results on experimental study of photovoltage, induced by pulsed CO2 laser in GaAs/AlGaAs heterojunctions. We show that photoemission of hot carriers across the potential barrier is the dominant mechanism in formation of the photovoltage. The analysis of the current-voltage characteristic reveals that the photocurrent has maximum at bias voltage related to the potential barrier height of p-n heterojunction. Moreover, we demostrate that the use of heterojunction has an advantage over homojunction in the infrared detection.
Download or read book AlGaAs Single mode Stability written by Dan Botez and published by . This book was released on 1983 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wide Temperature Range Operating AlGaAs GaAs Vertical cavity Surface emitting Lasers and Their Integration with Heterojunction Bipolar Transistors and Phototransistors written by Bo Lu and published by . This book was released on 1995 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Quality Multiple AlGaAs GaAs Quantum Well and Graded Refractive Index Separate Confinement Heterostructure Quantum Well Lasers Grown Via Molecular Beam Epitaxy written by Edward Allen Van Gieson and published by . This book was released on 1986 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diode Lasers written by D. Sands and published by CRC Press. This book was released on 2004-10-30 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: The compact size, reliability, and low cost of diode lasers lead to applications throughout modern technology-most importantly in modern optical telecommunication systems. This book presents a comprehensive introduction to the principles and operation of diode lasers. It begins with a review of semiconductor physics and laser fundamentals, before describing the most basic homojunction laser. Later chapters describe more advanced laser types and their applications, including the most recently developed and exotic laser designs. The author's intuitive style, coupled with an extensive set of worked examples and sample problems, make this an outstanding introduction to the subject.
Download or read book Physics and Technology of Heterojunction Devices written by Institution of Electrical Engineers and published by IET. This book was released on 1991 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together developments in both the physics and engineering of semiconductor devices. Much attention is paid to so-called 'band gap engineering' which is enabling new and higher performance devices to be researched and introduced.
Download or read book Handbook of Lasers written by Marvin J. Weber and published by CRC Press. This book was released on 2019-04-30 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lasers continue to be an amazingly robust field of activity. Anyone seeking a photon source is now confronted with an enormous number of possible lasers and laser wavelengths to choose from, but no single, comprehensive source to help them make that choice. The Handbook of Lasers provides an authoritative compilation of lasers, their properties, and original references in a readily accessible form. Organized by lasing media-solids, liquids, and gases-each section is subdivided into distinct laser types. Each type carries a brief description, followed by tables listing the lasing element or medium, host, lasing transition and wavelength, operating properties, primary literature citations, and, for broadband lasers, reported tuning ranges. The importance and value of the Handbook of Lasers cannot be overstated. Serving as both an archive and as an indicator of emerging trends, it reflects the state of knowledge and development in the field, provides a rapid means of obtaining reference data, and offers a pathway to the literature. It contains data useful for comparison with predictions and for developing models of processes, and may reveal fundamental inconsistencies or conflicts in the data.
Download or read book Selected Papers on Semiconductor Diode Lasers written by James J. Coleman and published by SPIE-International Society for Optical Engineering. This book was released on 1992 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
