Diode Laser Arrays
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Monolithic Diode Laser Arrays
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Author : Nils W. Carlson
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Monolithic Diode Laser Arrays written by Nils W. Carlson and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Over the last two decades, the search for a compact, high-power semiconductor source has produced many designs and concepts for monolithic diode-laser arrays and optical amplifiers. However, only a few design approaches have emerged with the potential for producing high-power, high-brightness monolithic sources. Although semiconductor-diode lasers are the most compact, highest gain and most efficient laser sources, challenges remain in developing structures that will produce high-quality, diffraction-limited output beams. This book presents and analyzes the results of work performed over the last twenty years in the development of high-brightness diode-laser arrays.
Diode Laser Arrays
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Author : Dan Botez
language : en
Publisher:
Release Date : 1994
Diode Laser Arrays written by Dan Botez and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Science categories.
This book provides a thorough overview of the principles and uses of semiconductor diode laser arrays.
Tailoring The Emission Of Stripe Array Diode Lasers With External Cavities To Enable Nonlinear Frequency Conversion
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Author : Andreas Jechow
language : en
Publisher: Universitätsverlag Potsdam
Release Date : 2009
Tailoring The Emission Of Stripe Array Diode Lasers With External Cavities To Enable Nonlinear Frequency Conversion written by Andreas Jechow and has been published by Universitätsverlag Potsdam this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Science categories.
A huge number of applications require coherent radiation in the visible spectral range. Since diode lasers are very compact and efficient light sources, there exists a great interest to cover these applications with diode laser emission. Despite modern band gap engineering not all wavelengths can be accessed with diode laser radiation. Especially in the visible spectral range between 480 nm and 630 nm no emission from diode lasers is available, yet. Nonlinear frequency conversion of near-infrared radiation is a common way to generate coherent emission in the visible spectral range. However, radiation with extraordinary spatial temporal and spectral quality is required to pump frequency conversion. Broad area (BA) diode lasers are reliable high power light sources in the near-infrared spectral range. They belong to the most efficient coherent light sources with electro-optical efficiencies of more than 70%. Standard BA lasers are not suitable as pump lasers for frequency conversion because of their poor beam quality and spectral properties. For this purpose, tapered lasers and diode lasers with Bragg gratings are utilized. However, these new diode laser structures demand for additional manufacturing and assembling steps that makes their processing challenging and expensive. An alternative to BA diode lasers is the stripe-array architecture. The emitting area of a stripe-array diode laser is comparable to a BA device and the manufacturing of these arrays requires only one additional process step. Such a stripe-array consists of several narrow striped emitters realized with close proximity. Due to the overlap of the fields of neighboring emitters or the presence of leaky waves, a strong coupling between the emitters exists. As a consequence, the emission of such an array is characterized by a so called supermode. However, for the free running stripe-array mode competition between several supermodes occurs because of the lack of wavelength stabilization. This leads to power fluctuations, spectral instabilities and poor beam quality. Thus, it was necessary to study the emission properties of those stripe-arrays to find new concepts to realize an external synchronization of the emitters. The aim was to achieve stable longitudinal and transversal single mode operation with high output powers giving a brightness sufficient for efficient nonlinear frequency conversion. For this purpose a comprehensive analysis of the stripe-array devices was done here. The physical effects that are the origin of the emission characteristics were investigated theoretically and experimentally. In this context numerical models could be verified and extended. A good agreement between simulation and experiment was observed. One way to stabilize a specific supermode of an array is to operate it in an external cavity. Based on mathematical simulations and experimental work, it was possible to design novel external cavities to select a specific supermode and stabilize all emitters of the array at the same wavelength. This resulted in stable emission with 1 W output power, a narrow bandwidth in the range of 2 MHz and a very good beam quality with M²<1.5. This is a new level of brightness and brilliance compared to other BA and stripe-array diode laser systems. The emission from this external cavity diode laser (ECDL) satisfied the requirements for nonlinear frequency conversion. Furthermore, a huge improvement to existing concepts was made. In the next step newly available periodically poled crystals were used for second harmonic generation (SHG) in single pass setups. With the stripe-array ECDL as pump source, more than 140 mW of coherent radiation at 488 nm could be generated with a very high opto-optical conversion efficiency. The generated blue light had very good transversal and longitudinal properties and could be used to generate biphotons by parametric down-conversion. This was feasible because of the improvement made with the infrared stripe-array diode lasers due to the development of new physical concepts.
2 3 Micron High Power Continuous Wave Diode Laser Arrays
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Author :
language : en
Publisher:
Release Date : 2004
2 3 Micron High Power Continuous Wave Diode Laser Arrays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Report developed under STTR contract for topic AFO3TO25 (2.3 Micron High Power Continuous Wave Diode Laser Arrays). This final technical report describes progress made to demonstrate the technical feasibility of high power GaSb based semiconductor laser arrays. These arrays have many potential applications includinq infrared countermeasures (IRCM), pumping of solid state lasers, low probability of intercept communication links, and trace gas analysis. Civilian applications exist in the fields of medical diagnostics and dermatological treatments. The research involved the fabrication and complete characterization of single emitter GaSb based devices. Successfbl results with the single emitter devices led to the demonstration, for the first time, of a one-dimensional 2.3 micr9n laser array. The array produced 10 watts in continuous wave operation, 18.5W in long pulse operation, and over 20W in short pulse operation (short pulse power limited by current source).
Handbook Of Distributed Feedback Laser Diodes Second Edition
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Author : Geert Morthier
language : en
Publisher: Artech House
Release Date : 2013-09-01
Handbook Of Distributed Feedback Laser Diodes Second Edition written by Geert Morthier and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-09-01 with Technology & Engineering categories.
Since the first edition of this book was published in 1997, the photonics landscape has evolved considerably and so has the role of distributed feedback (DFB) laser diodes. Although tunable laser diodes continue to be introduced in advanced optical communication systems, DFB laser diodes are still widely applied in many deployed systems. This also includes wavelength tunable DFB laser diodes and DFB laser diode arrays, usually integrated with intensity or phase modulators and semiconductor optical amplifiers. This valuable resource gives professionals a comprehensive description of the different effects that determine the behavior of a DFB laser diode. Special attention is given to two new chapters on wavelength tunable DFB laser diodes and bistable and unstable DFB laser diodes. Among many other updates throughout the reference, semi-conductor and electromagnetic professionals are also provided two new appendices. This book fully covers the underlying theory, commercial applications, necessary design criteria, and future direction of this technology.
Non Parallel Etched Facet Diode Laser Arrays
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Author : Daniel Alphonse Francis
language : en
Publisher:
Release Date : 1997
Non Parallel Etched Facet Diode Laser Arrays written by Daniel Alphonse Francis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Beam optics categories.
High Power Diode Lasers
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Author : Roland Diehl
language : en
Publisher: Springer Science & Business Media
Release Date : 2003-07-01
High Power Diode Lasers written by Roland Diehl and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-07-01 with Science categories.
Methods of design and fabrication of high-power diode lasers using proven semiconductor technologies are described in this book. The latter include epitaxy and optical lithography, mounting on heat sinks, beam forming with micro-optics and coupling to optical fibers, and reliability testing. Direct applications of high-power diode lasers in materials processing and for pumping hitherto unknown solid-state laser systems are presented in a comprehensive fashion. Thus, this book is an invaluable source of information for all scientists and engineers designing laser systems and applying the laser as a reliable and economic tool in a multitude of environments.
Tunable External Cavity Diode Lasers
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Author : Cunyun Ye
language : en
Publisher: World Scientific
Release Date : 2004
Tunable External Cavity Diode Lasers written by Cunyun Ye and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Science categories.
This is the first book on tunable external cavity semiconductor diode lasers, providing an up-to-date survey on the physics, technology, and performance of widely applicable coherent radiation sources of tunable external cavity diode lasers. The purpose is to provide a thorough account of the state-of-the-art of tunable external cavity diode lasers which is achieved by combining this account with basic concepts of semiconductor diode lasers and its tunability with monolithic structures. The practical and accessible information in this volume will enable the reader to study external cavity diode laser, to build up the systems of external cavity diode laser as well as to develop advanced systems for their particular applications. This book will appeal to undergraduate and graduate students, scientists and engineers alike.
Analysis Of Spatio Temporal Phenomena In High Brightness Diode Lasers Using Numerical Simulations
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Author : Anissa Zeghuzi
language : en
Publisher: Cuvillier Verlag
Release Date : 2020-10-22
Analysis Of Spatio Temporal Phenomena In High Brightness Diode Lasers Using Numerical Simulations written by Anissa Zeghuzi and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-10-22 with Science categories.
Broad-area lasers are edge-emitting semiconductor lasers with a wide lateral emission aperture. This feature enables high output powers but also diminishes the lateral beam quality and results in their inherently non-stationary behavior. Research in the area is driven by application, and the main objective is to increase the brightness, which includes both output power and lateral beam quality. To understand the underlying spatio-temporal phenomena and to apply this knowledge in order to reduce costs for brightness optimization, a self-consistent simulation tool taking all essential processes into account is vital. Firstly, in this work a quasi-three-dimensional opto-electronic and thermal model is presented that describes essential qualitative characteristics of real devices well. Time-dependent traveling-wave equations are utilized to characterize the inherently non-stationary optical fields, which are coupled to dynamic rate equations for the excess carriers in the active region. This model is extended by an injection-current-density model to accurately include lateral current spreading and spatial hole burning. Furthermore, a temperature model is presented that includes short-time local heating near the active region as well as the formation of a stationary temperature profile. Secondly, the reasons of brightness degradation, i.e. the origins of power saturation and the spatially modulated field profile, are investigated. And lastly, designs that mitigate those effects limiting the lateral brightness under pulsed and continuous-wave operation are discussed. Amongst those designs a novel “chessboard laser” is presented that utilizes longitudinal-lateral gain-loss modulation and an additional phase tailoring to obtain a very low far-field divergence.
Semiconductor Laser Engineering Reliability And Diagnostics
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Author : Peter W. Epperlein
language : en
Publisher: John Wiley & Sons
Release Date : 2013-01-25
Semiconductor Laser Engineering Reliability And Diagnostics written by Peter W. Epperlein and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-01-25 with Technology & Engineering categories.
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.