Development of Simplified External Control Techniques for Broad Area Semiconductor Lasers PDF Download
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722353728
Category :
Languages : en
Pages : 78
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Book Description
The goal of this project was to injection lock a 500 mW broad area laser diode (BAL) with a single mode low power laser diode with injection beam delivery through a single mode optical fiber (SMF). This task was completed successfully with the following significant accomplishments: (1) injection locking of a BAL through a single-mode fiber using a master oscillator and integrated miniature optics; (2) generation of a single-lobed, high-power far-field pattern from the injection-locked BAL that steers with drive current; and (3) a comprehensive theoretical analysis of a model that describes the observed behavior of the injection locked oscillator. Davis, Christopher C. Unspecified Center...
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722353728
Category :
Languages : en
Pages : 78
Get Book Here
Book Description
The goal of this project was to injection lock a 500 mW broad area laser diode (BAL) with a single mode low power laser diode with injection beam delivery through a single mode optical fiber (SMF). This task was completed successfully with the following significant accomplishments: (1) injection locking of a BAL through a single-mode fiber using a master oscillator and integrated miniature optics; (2) generation of a single-lobed, high-power far-field pattern from the injection-locked BAL that steers with drive current; and (3) a comprehensive theoretical analysis of a model that describes the observed behavior of the injection locked oscillator. Davis, Christopher C. Unspecified Center...
Author:
Publisher:
ISBN:
Category : Federal aid to research
Languages : en
Pages : 510
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Book Description
Author: Deborah M. Kane
Publisher: John Wiley & Sons
ISBN: 0470856203
Category : Science
Languages : en
Pages : 356
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Book Description
Applications of semiconductor lasers with optical feedback systems are driving rapid developments in theoretical and experimental research. The very broad wavelength-gain-bandwidth of semiconductor lasers combined with frequency-filtered, strong optical feedback create the tunable, single frequency laser systems utilised in telecommunications, environmental sensing, measurement and control. Those with weak to moderate optical feedback lead to the chaotic semiconductor lasers of private communication. This resource illustrates the diversity of dynamic laser states and the technological applications thereof, presenting a timely synthesis of current findings, and providing the roadmap for exploiting their future potential. * Provides theory-based explanations underpinned by a vast range of experimental studies on optical feedback, including conventional, phase conjugate and frequency- filtered feedback in standard, commercial and single-stripe semiconductor lasers * Includes the classic Lang-Kobayashi equation model, through to more recent theory, with new developments in techniques for solving delay differential equations and bifurcation analysis * Explores developments in self-mixing interferometry to produce sub-nanometre sensitivity in path-length measurements * Reviews tunable single frequency semiconductor lasers and systems and their diverse range of applications in sensing and optical communications * Emphasises the importance of synchronised chaotic semiconductor lasers using optical feedback and private communications systems Unlocking Dynamical Diversity illustrates all theory using real world examples gleaned from international cutting-edge research. Such an approach appeals to industry professionals working in semiconductor lasers, laser physics and laser applications and is essential reading for researchers and postgraduates in these fields.
Author:
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Category : Aeronautics
Languages : en
Pages : 324
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Book Description
Author: Junji Ohtsubo
Publisher: Springer
ISBN: 3319561383
Category : Science
Languages : en
Pages : 679
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Book Description
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.
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Category : Government publications
Languages : en
Pages :
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Book Description
Author: Alexei Baranov
Publisher: Elsevier
ISBN: 0857096400
Category : Technology & Engineering
Languages : en
Pages : 671
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Book Description
Semiconductor lasers have important applications in numerous fields, including engineering, biology, chemistry and medicine. They form the backbone of the optical telecommunications infrastructure supporting the internet, and are used in information storage devices, bar-code scanners, laser printers and many other everyday products. Semiconductor lasers: Fundamentals and applications is a comprehensive review of this vital technology.Part one introduces the fundamentals of semiconductor lasers, beginning with key principles before going on to discuss photonic crystal lasers, high power semiconductor lasers and laser beams, and the use of semiconductor lasers in ultrafast pulse generation. Part two then reviews applications of visible and near-infrared emitting lasers. Nonpolar and semipolar GaN-based lasers, advanced self-assembled InAs quantum dot lasers and vertical cavity surface emitting lasers are all considered, in addition to semiconductor disk and hybrid silicon lasers. Finally, applications of mid- and far-infrared emitting lasers are the focus of part three. Topics covered include GaSb-based type I quantum well diode lasers, interband cascade and terahertz quantum cascade lasers, whispering gallery mode lasers and tunable mid-infrared laser absorption spectroscopy.With its distinguished editors and international team of expert contributors, Semiconductor lasers is a valuable guide for all those involved in the design, operation and application of these important lasers, including laser and telecommunications engineers, scientists working in biology and chemistry, medical practitioners, and academics working in this field. - Provides a comprehensive review of semiconductor lasers and their applications in engineering, biology, chemistry and medicine - Discusses photonic crystal lasers, high power semiconductor lasers and laser beams, and the use of semiconductor lasers in ultrafast pulse generation - Reviews applications of visible and near-infrared emitting lasers and mid- and far-infrared emitting lasers
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ISBN:
Category : Government publications
Languages : en
Pages : 750
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Book Description
Author: John A. Houlihan
Publisher:
ISBN:
Category : Semiconductor lasers
Languages : en
Pages : 149
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Book Description
The study of semiconductor lasers over the past 40 years has been concerned with both their operating characteristics and their properties as a non-linear optical system. In particular, the transition from stable dynamical operation to a more complex dynamical state, when the number of degrees of freedom of the system is increased, is of great interest from technological as well as fundamental viewpoints. This thesis will examine two examples of this type of extension namely, the increase in the transverse size of the laser cavity and the effect of delayed external incoherent feedback, on the lasers dynamics. In the former case we will study a mechanism for the stabilization of the chaotic output of the laser and in the latter we will identify some instabilities and discuss their properties. Broad area lasers are ubiquitous in modern optical fiber networks, their main application being the pumping of erbium doped fiber amplifiers. They are characterized by their ease of fabrication and subsequent low cost. However, they display complex chaotic spatio-temporal dynamics at high output powers which leads to a loss in the spatial coherence of the laser beam. This loss in spatial coherence limits the applications of these devices and/or constrains the laser to operate at low output powers. We will analyse, both experimentally and theoretically, a simple technique which may be used to stabilize the output of these simple broad area lasers, namely transverse injection profiling. The mechanism for stabilization of these lasers is identified and an alternative implementation is discussed. In the remainder of the thesis, the effect of incoherent delayed feedback on a single transverse mode, multi-longitudinal mode semiconductor laser is experimentally analysed. This experiment is motivated by the large amount of theoretical and experimental work concerning both regular and phase conjugate optical feedback in semiconductor laser devices. In these situations, the dynamical evolution is determined by the coupling between the carriers, the optical intensity and the phase difference between the laser output and delayed field. In the incoherent case, the phase difference may be neglected. In particular, the effect of phase amplitude coupling, which plays a crucial role in the coherent and phase-conjugate feedback situations, may be neglected in the incoherent feedback case. This is because the external cavity system is no longer sensitive to small changes in the solitary laser frequency. However, the system still displays a number of intensity instabilities, similar to the coherent feedback case, whose nature will be discussed.
Author: Peter W. Epperlein
Publisher: John Wiley & Sons
ISBN: 1118481860
Category : Technology & Engineering
Languages : en
Pages : 522
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Book Description
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.
