Download or read book Spatial Mode Dynamics in Wide Aperture Semiconductor Lasers written by Jayanta Mukherjee and published by . This book was released on 2009 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scaling the brightness (spatial coherence) along with output power has been a long-standing problem for semiconductor lasers. The difficulty arises due to complex spatiotemporal modal filamentation associated with light-matter interaction in the non-linear semiconductor lasing medium. This work presents a detailed study of spatiotemporal dynamics in wide aperture semiconductor lasers with the motivation of the identifying factors limiting brightness scaling in the high power regime thereby finding routes to scale the brightness using the unique properties of quantum confined active regions. In this view an opto-electro-thermal model is developed within the Maxwell-Bloch formalism with the capability of describing, frequency, carrier and temperature dependent semiconductor gain and dispersion. The model captures the essential spatiotemporal dynamics in both the thermal and non-thermal regimes and for both homogenous and inhomogeneous broadening in the semiconductor lasing medium. First a steady-state electro-thermal model is developed to simulate the current and heat spreading in the device. Finite element technique (FEM) based simulations are compared with experimental temperature maps obtained from micro-thermographic analysis producing an excellent match resulting in the first concerted study of bulk thermal properties of broad area quantum dot lasers. The thermal model is then used in conjunction with the Maxwell-Bloch based opto-electro-thermal model to obtain pump-dependent modal intensity structure and spatial frequency spectral characteristics. Effect of both homogeneous and inhomogeneous gain broadening is analysed in both the thermal and non-thermal regimes. It is shown via linear stability analysis and high resolution FEM simulations that presence of inhomogeneous gain broadening leads to improved spatial coherence and suppressed filamentation in both thermal and non-thermal regimes. A novel technique based on decoupling of lateral travelling waves corresponding to higher order spatial modes via index-anti-guiding is also described leading to a complete suppression of filamentary modal behaviour. Preliminary experimental results are presented validating the theoretical prediction.
Download or read book Nonlinear Dynamics and Spatial Complexity in Optical Systems written by R. G. Harrison and published by CRC Press. This book was released on 2018-05-04 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of prestigious postgraduate lectures, Nonlinear Dynamics and Spatial Complexity in Optical Systems reviews developments in the theory and practice of nonlinear dynamics and structural complexity, and explores modern-day applications in nonlinear optics. The book addresses systems including both singlemode and multimode lasers, bistable and multistable devices, optical fibers, counter-propagating beam interactions, nonlinear mixing, and related optical phenomena.
Download or read book Handbook of Optoelectronics written by John P. Dakin and published by CRC Press. This book was released on 2017-10-10 with total page 859 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Optoelectronics offers a self-contained reference from the basic science and light sources to devices and modern applications across the entire spectrum of disciplines utilizing optoelectronic technologies. This second edition gives a complete update of the original work with a focus on systems and applications. Volume I covers the details of optoelectronic devices and techniques including semiconductor lasers, optical detectors and receivers, optical fiber devices, modulators, amplifiers, integrated optics, LEDs, and engineered optical materials with brand new chapters on silicon photonics, nanophotonics, and graphene optoelectronics. Volume II addresses the underlying system technologies enabling state-of-the-art communications, imaging, displays, sensing, data processing, energy conversion, and actuation. Volume III is brand new to this edition, focusing on applications in infrastructure, transport, security, surveillance, environmental monitoring, military, industrial, oil and gas, energy generation and distribution, medicine, and free space. No other resource in the field comes close to its breadth and depth, with contributions from leading industrial and academic institutions around the world. Whether used as a reference, research tool, or broad-based introduction to the field, the Handbook offers everything you need to get started. (The previous edition of this title was published as Handbook of Optoelectronics, 9780750306461.) John P. Dakin, PhD, is professor (emeritus) at the Optoelectronics Research Centre, University of Southampton, UK. Robert G. W. Brown, PhD, is chief executive officer of the American Institute of Physics and an adjunct full professor in the Beckman Laser Institute and Medical Clinic at the University of California, Irvine.
Download or read book Semiconductor Laser Dynamics written by and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Significant progress has been made in constructing a mathematical model of wide aperture semi-conductor lasers which simultaneously resolves multi-longitudinal mode and transverse filamentation instabilities in high brightness lasers. The original working model discussed under project 'Simulations of Broad Area Flared Amplifiers and Lasers' utilized a nonlinear gain/index model but ignored gain and index dispersion. Gain and index spectra computed microscopically for specific laser structures and including the contributions of barrier states, are fed as rational functions approximations into the laser simulation code. Using this model, we have been able, for the first time, to simulate the full space-time evolution of all the relevant optical fields and carrier density in the state-of-the-art commercial MOPA high brightness source. Our simulations, suggesting a redesign of this device for improved stability, has attracted the attention of Opto Power Corporation laser design engineers.
Download or read book Semiconductor Lasers written by Junji Ohtsubo and published by Springer. This book was released on 2017-05-03 with total page 679 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the fascinating recent advances made concerning the chaos, stability and instability of semiconductor lasers, and discusses their applications and future prospects in detail. It emphasizes the dynamics in semiconductor lasers by optical and electronic feedback, optical injection, and injection current modulation. Applications of semiconductor laser chaos, control and noise, and semiconductor lasers are also demonstrated. Semiconductor lasers with new structures, such as vertical-cavity surface-emitting lasers and broad-area semiconductor lasers, are intriguing and promising devices. Current topics include fast physical number generation using chaotic semiconductor lasers for secure communication, development of chaos, quantum-dot semiconductor lasers and quantum-cascade semiconductor lasers, and vertical-cavity surface-emitting lasers. This fourth edition has been significantly expanded to reflect the latest developments. The fundamental theory of laser chaos and the chaotic dynamics in semiconductor lasers are discussed, but also for example the method of self-mixing interferometry in quantum-cascade lasers, which is indispensable in practical applications. Further, this edition covers chaos synchronization between two lasers and the application to secure optical communications. Another new topic is the consistency and synchronization property of many coupled semiconductor lasers in connection with the analogy of the dynamics between synaptic neurons and chaotic semiconductor lasers, which are compatible nonlinear dynamic elements. In particular, zero-lag synchronization between distant neurons plays a crucial role for information processing in the brain. Lastly, the book presents an application of the consistency and synchronization property in chaotic semiconductor lasers, namely a type of neuro-inspired information processing referred to as reservoir computing.
Download or read book Spatial Mode Similarities Among Multiple Longitudinal Modes in Semiconductor Lasers written by Andrew Lee Warnock and published by . This book was released on 2004 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Optical Society of America written by and published by . This book was released on 1999 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear Optical Cavity Dynamics written by Philippe Grelu and published by John Wiley & Sons. This book was released on 2015-12-23 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: By recirculating light in a nonlinear propagation medium, the nonlinear optical cavity allows for countless options of light transformation and manipulation. In passive media, optical bistability and frequency conversion are central figures. In active media, laser light can be generated with versatile underlying dynamics. Emphasizing on ultrafast dynamics, the vital arena for the information technology, the soliton is a common conceptual keyword, thriving into its modern developments with the closely related denominations of dissipative solitons and cavity solitons. Recent technological breakthroughs in optical cavities, from micro-resonators to ultra-long fiber cavities, have entitled the exploration of nonlinear optical dynamics over unprecedented spatial and temporal orders of magnitude. By gathering key contributions by renowned experts, this book aims at bridging the gap between recent research topics with a view to foster cross-fertilization between research areas and stimulating creative optical engineering design.
Download or read book Physical Review written by and published by . This book was released on 1997-03 with total page 1770 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publishes papers that report results of research in statistical physics, plasmas, fluids, and related interdisciplinary topics. There are sections on (1) methods of statistical physics, (2) classical fluids, (3) liquid crystals, (4) diffusion-limited aggregation, and dendritic growth, (5) biological physics, (6) plasma physics, (7) physics of beams, (8) classical physics, including nonlinear media, and (9) computational physics.
Download or read book Soviet Physics written by and published by . This book was released on 1992 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microcavity Semiconductor Lasers written by Yong-zhen Huang and published by John Wiley & Sons. This book was released on 2021-06-28 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microcavity Semiconductor Lasers Explore this thorough overview of integrable microcavity semiconductor lasers and their applications from two leading voices in the field Attracting a great deal of attention over the last decades for their promising applications in photonic integration and optical interconnects, microcavity semiconductor lasers continue to develop via advances in fundamental physics, theoretical analysis, and numerical simulations. In a new work that will be of interest to researchers and practitioners alike, Microcavity Semiconductor Lasers: Principles, Design, and Applications delivers an application-oriented and highly relevant exploration of the theory, fabrication, and applications of these practical devices. The book focuses on unidirectional emission microcavity lasers for photonic integrated circuits, including polygonal microresonators, microdisk, and microring lasers. After an introductory overview of optical microcavities for microlasers and detailed information of the lasers themselves, including mode structure control and characteristics, and lasing properties, the distinguished authors discuss fabrication and applications of different microcavity lasers. Prospects for future research and potential new applications round out the book. Readers will also benefit from the inclusion of: A thorough introduction to multilayer optical waveguides, the FDTD Method, and Padé Approximation, and deformed, chaos, and unidirectional emission microdisk lasers An exploration of mode analysis for triangle and square microresonators similar as FP Cavity Practical discussions of mode analysis and control for deformed square microlasers An examination of hexagonal microcavity lasers and polygonal microcavities, along with vertical radiation loss for 3D microcavities Perfect for laser specialists, semiconductor physicists, and solid-state physicists, Microcavity Semiconductor Lasers: Principles, Design, and Applications will also earn a place in the libraries of materials scientists and professionals working in the semiconductor and optical industries seeking a one-stop reference for integrable microcavity semiconductor lasers.
Download or read book Novel Spatial mode Selection Using Distributed Feedback Gratings in Single mode Resonant Antiguided Diode Laser Arrays written by Michael P. Nesnidal and published by . This book was released on 1998 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Spatio Temporal Phenomena in High Brightness Diode Lasers using Numerical Simulations written by Anissa Zeghuzi and published by Cuvillier Verlag. This book was released on 2020-10-22 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Spatial Mode Filters for Control of Lateral Modes in High Power Semiconductor Lasers written by Reuel Bennett Swint and published by . This book was released on 2002 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Induced Damage in Optical Materials written by Brian E. Newnam and published by ASTM International. This book was released on 1986 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
