Spatial Mode Dynamics in Wide Aperture Semiconductor Lasers - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Spatial Mode Dynamics in Wide Aperture Semiconductor Lasers write by Jayanta Mukherjee. This book was released on 2009. Spatial Mode Dynamics in Wide Aperture Semiconductor Lasers available in PDF, EPUB and Kindle. 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.
Nonlinear Dynamics and Spatial Complexity in Optical Systems
Nonlinear Dynamics and Spatial Complexity in Optical Systems - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Nonlinear Dynamics and Spatial Complexity in Optical Systems write by R. G. Harrison. This book was released on 2018-05-04. Nonlinear Dynamics and Spatial Complexity in Optical Systems available in PDF, EPUB and Kindle. 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.
Handbook of Optoelectronics
Handbook of Optoelectronics - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Handbook of Optoelectronics write by John P. Dakin. This book was released on 2017-10-10. Handbook of Optoelectronics available in PDF, EPUB and Kindle. 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.
Semiconductor Laser Dynamics
Semiconductor Laser Dynamics - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Semiconductor Laser Dynamics write by . This book was released on 1997. Semiconductor Laser Dynamics available in PDF, EPUB and Kindle. 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.
Semiconductor Lasers
Semiconductor Lasers - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Semiconductor Lasers write by Junji Ohtsubo. This book was released on 2017-05-03. Semiconductor Lasers available in PDF, EPUB and Kindle. 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.
