Passively Mode-Locked Semiconductor Lasers PDF Download

Author: Lina Jaurigue
Publisher: Springer
ISBN: 3319588745
Category : Science
Languages : en
Pages : 206

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Book Description
This thesis investigates the dynamics of passively mode-locked semiconductor lasers, with a focus on the influence of optical feedback on the noise characteristics. The results presented here are important for improving the performance of passively mode-locked semiconductor lasers and, at the same time, are relevant for understanding delay-systems in general. The semi-analytic results developed are applicable to a broad range of oscillatory systems with time-delayed feedback, making the thesis of relevance to various scientific communities. Passively mode-locked lasers can produce pulse trains and have applications in the contexts of optical clocking, microscopy and optical data communication, among others. Using a system of delay differential equations to model these devices, a combination of numerical and semi-analytic methods is developed and used to characterize this system.

Author: Peter W. Smith
Publisher: Pergamon
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 132

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Author: Michael Jetter
Publisher: John Wiley & Sons
ISBN: 3527807977
Category : Technology & Engineering
Languages : en
Pages : 584

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Book Description
Vertical External Cavity Surface Emitting Lasers Provides comprehensive coverage of the advancement of vertical-external-cavity surface-emitting lasers Vertical-external-cavity surface-emitting lasers (VECSELs) emit coherent light from the infrared to the visible spectral range with high power output. Recent years have seen new device developments – such as the mode-locked integrated (MIXSEL) and the membrane external-cavity surface emitting laser (MECSEL) – expand the application of VECSELs to include laser cooling, spectroscopy, telecommunications, biophotonics, and laser-based displays and projectors. In Vertical External Cavity Surface Emitting Lasers: VECSEL Technology and Applications, leading international research groups provide a comprehensive, fully up-to-date account of all fundamental and technological aspects of vertical external cavity surface emitting lasers. This unique book reviews the physics and technology of optically-pumped disk lasers and discusses the latest developments of VECSEL devices in different wavelength ranges. Topics include OP-VECSEL physics, continuous wave (CW) lasers, frequency doubling, carrier dynamics in SESAMs, and characterization of nonlinear lensing in VECSEL gain samples. This authoritative volume: Summarizes new concepts of DBR-free and MECSEL lasers for the first time Covers the mode-locking concept and its application Provides an overview of the emerging concept of self-mode locking Describes the development of next-generation OPS laser products Vertical External Cavity Surface Emitting Lasers: VECSEL Technology and Applications is an invaluable resource for laser specialists, semiconductor physicists, optical industry professionals, spectroscopists, telecommunications engineers and industrial physicists.

Author: Sulaiman Wadi Harun
Publisher: BoD – Books on Demand
ISBN: 9535111485
Category : Technology & Engineering
Languages : en
Pages : 602

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Book Description
This book is a compilation of works presenting recent advances and progress in optical fiber technology related to the next generation optical communication, system and network, sensor, laser, measurement, characterization and devices. It contains five sections including optical fiber communication systems and networks, plastic optical fibers technologies, fiber optic sensors, fiber lasers and fiber measurement techniques and fiber optic devices on silicon chip. Each chapter in this book is a contribution from a group of academicians and scientists from a prominent university or research center, involved in cutting edge research in the field of photonics. This compendium is an invaluable reference for researchers and practitioners working in academic institutions as well as industries.

Author: H. Statz
Publisher:
ISBN:
Category :
Languages : en
Pages : 95

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Book Description
In the report we investigate the basic mechanisms that lead to mode locking in lasers and to the formation of ultrashort pulses. We find that in lasers nonlinear polarizations are produced at the so-called combination tone frequencies which act much like externally injected signals. When the amplitudes of the combination tone polarizations are large enough, the various modes may lock onto them and definite phase relationships between these modes are established. The amplitudes of the source polarization terms are proportional to the third power of the electric field and thus locking depends upon the power level of the laser. Furthermore, the nonlinear polarization is proportional to the fourth power of the dipole matrix element between the two states in question and thus depends strongly on the radiative lifetime of the upper laser state. It is thus clear why a short lifetime saturable absorber is very effective in producing self locking. It can also be shown that a mode-locked laser emits more radiation than an oscillator with random phases. Also investigates mode suppression in ring lasers and related devices. It is found that for sufficiently large splittings of a given longitudinal mode, one of the split-off components tends to become suppressed. This is due to the fact that the gain in one of the modes is significantly lower. Mode suppression of this type is investigated in Nd(3+) - doped YAG lasers. (Author).

Author: Dieter Meschede
Publisher: Springer
ISBN: 3319643460
Category : Science
Languages : en
Pages : 799

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Book Description
This edition contains carefully selected contributions by leading scientists in high-resolution laser spectroscopy, quantum optics and laser physics. Emphasis is given to ultrafast laser phenomena, implementations of frequency combs, precision spectroscopy and high resolution metrology. Furthermore, applications of the fundamentals of quantum mechanics are widely covered. This book is dedicated to Nobel prize winner Theodor W. Hänsch on the occasion of his 75th birthday. The contributions are reprinted from a topical collection published in Applied Physics B, 2016. Selected contributions are available open access under a CC BY 4.0 license via link.springer.com. Please see the copyright page for further details.

Author: Niloy K Dutta
Publisher: World Scientific
ISBN: 9811290180
Category : Science
Languages : en
Pages : 325

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Book Description
This invaluable book provides a comprehensive treatment of the design and application of Mode Locked Lasers and Short Pulse Generation. With the advances in semiconductor laser and fiber laser technologies in the 1980s to now, these devices have been made compact, refined, and developed for a wide range of applications including further scientific studies.Semiconductor mode-locked lasers are stable pulse sources and can be made over a range of wavelengths where laser operation is feasible. Rare earth doped fiber lasers or planar waveguides extend this range further and can provide compact pulsed sources. The principles of operation, analysis, design and fabrication of these sources are described. Recent results on high repetition rate and high-power pulse generation from these compacts sources are also described, together with current and future directions of application of these types of laser sources.Mode-Locked Lasers: Introduction to Ultrafast Semiconductor and Fiber Lasers is self-contained and unified in presentation. It can be used as an advanced text by graduate students and by practicing engineers. It is also suitable for non-experts who wish to have an overview of mode-locked lasers and pulse generation. The explanations in the book are detailed enough to capture the interest of the curious reader and complete enough to provide the necessary background to explore the subject further.

Author: Jean-Claude Diels
Publisher: Elsevier
ISBN: 0080466400
Category : Science
Languages : en
Pages : 675

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Book Description
Ultrashort Laser Pulse Phenomena, Second Edition serves as an introduction to the phenomena of ultra short laser pulses and describes how this technology can be used to examine problems in areas such as electromagnetism, optics, and quantum mechanics. Ultrashort Laser Pulse Phenomena combines theoretical backgrounds and experimental techniques and will serve as a manual on designing and constructing femtosecond ("faster than electronics") systems or experiments from scratch. Beyond the simple optical system, the various sources of ultrashort pulses are presented, again with emphasis on the basic concepts and how they apply to the design of particular sources (dye lasers, solid state lasers, semiconductor lasers, fiber lasers, and sources based on frequency conversion). - Provides an easy to follow guide through "faster than electronics" probing and detection methods - THE manual on designing and constructing femtosecond systems and experiments - Discusses essential technology for applications in micro-machining, femtochemistry, and medical imaging

Author: Le Nguyen Binh
Publisher: CRC Press
ISBN: 1439811288
Category : Science
Languages : en
Pages : 441

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Book Description
Ultrashort pulses in mode-locked lasers are receiving focused attention from researchers looking to apply them in a variety of fields, from optical clock technology to measurements of the fundamental constants of nature and ultrahigh-speed optical communications. Ultrashort pulses are especially important for the next generation of ultrahigh-speed optical systems and networks operating at 100 Gbps per carrier. Ultra Fast Fiber Lasers: Principles and Applications with MATLAB® Models is a self-contained reference for engineers and others in the fields of applied photonics and optical communications. Covering both fundamentals and advanced research, this book includes both theoretical and experimental results. MATLAB files are included to provide a basic grounding in the simulation of the generation of short pulses and the propagation or circulation around nonlinear fiber rings. With its unique and extensive content, this volume— Covers fundamental principles involved in the generation of ultrashort pulses employing fiber ring lasers, particularly those that incorporate active optical modulators of amplitude or phase types Presents experimental techniques for the generation, detection, and characterization of ultrashort pulse sequences derived from several current schemes Describes the multiplication of ultrashort pulse sequences using the Talbot diffraction effects in the time domain via the use of highly dispersive media Discusses developments of multiple short pulses in the form of solitons binding together by phase states Elucidates the generation of short pulse sequences and multiple wavelength channels from a single fiber laser The most practical short pulse sources are always found in the form of guided wave photonic structures. This minimizes problems with alignment and eases coupling into fiber transmission systems. In meeting these requirements, fiber ring lasers operating in active mode serve well as suitable ultrashort pulse sources. It is only a matter of time before scientists building on this research develop the practical and easy-to-use applications that will make ultrahigh-speed optical systems universally available.

Author: Gerald Raymond Willenbring
Publisher:
ISBN:
Category :
Languages : en
Pages : 292

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Book Description
An experimental and theoretical discussion of self-mode locking in multimode CW gas lasers is presented. The average saturated gain profile is assumed to be nearly flat in the frequency range of the oscillating modes because the homogeneous pressure-broadened linewidth is larger than the intermode frequency spacing. For He-Ne and He-Cd(+) lasers the gain fluctuations which occur as the pulses propagate through the active medium are believed to be small since the pulse velocity has been found to be approximately the same as the group velocity associated with the average dispersion. Estimates of the recovery time for the inversion density in a He-Ne laser indicate that the gain variations are a few percent of the average gain. An experimental technique for measuring the mode phases was developed, and measurements were made on a self-locked He-Ne laser with about seven modes. The results show that the modes are not in phase, and that, for the particular laser used, one mode toward the high-frequency end of the spectrum is lagging the others in phase by about 40 degrees. (Author).