Download or read book Stimulated Brillouin Scattering in Monomode Optical Fibres for Sensing and Signal Processing Applications written by Christopher Duffy and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectrum Engineering of Stimulated Brillouin Scattering in Distributed Fiber Sensing and Optical Signal Processing written by Cheng Feng and published by Cuvillier Verlag. This book was released on 2020-12-03 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stimulated Brillouin scattering is one of the dominant nonlinear effects in single mode optical fibers due to its low threshold. Its unique Lorentzian gain spectrum characteristic with the narrow linewidth of 20-30 MHz has enabled numerous of applications, such as optical signal processing, delay and light storage, optical spectrum analysis and distributed sensing. However, a fixed spectral characteristic cannot meet the requirements of a variety of applications. Therefore, an engineered, reconfigurable or arbitrary manipulated gain spectrum is of great importance. This book will start from the basics of stimulated Brillouin scattering and its principle for distributed fiber sensing and optical signal processing. The basic method for Brillouin gain spectrum engineering by the pump modulation and the superposition with Brillouin loss(es) will be introduced. As the main contain of this book, the application of Brillouin gain spectrum engineering in the field of static and dynamic distributed fiber sensing, and optical signal processing together with the advantages and benefits will be demonstrated in detail. Under the assistance of gain spectrum engineering, solutions have been proposed for drawbacks such as measurand resolution in static distributed fiber sensing, tradeoff between dynamic range and sensitivity in dynamic distributed fiber sensing, and inevitable Brillouin noise in optical and microwave photonic filters based on stimulated Brillouin scattering.
Download or read book Bandwidth Reduction of Stimulated Brillouin Scattering and Applications in Optical Communication written by Stefan Preußler and published by Cuvillier Verlag. This book was released on 2016-10-12 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stimulated Brillouin scattering is the most dominant nonlinear effect in single mode optical fibers. Its unique spectral characteristics, especially the narrow bandwidth of 20 – 30 MHz enable numerous applications, including optical spectrum analysis, delay and storage of light, distributed sensing and optical signal processing. Most of them would benefit from a reduction of the Brillouin gain bandwidth. This dissertation demonstrates several methods for significant reduction of the Brillouin gain bandwidth, including a multi-stage system, the superposition of the gain with two losses as well as the utilization of a frequency domain aperture. Thereby the Brillouin gain bandwidth can be reduced significantly down to 3 MHz, which equals 15% of the normal bandwidth. Furthermore, the reduced Brillouin gain bandwidth is employed for various applications. First, the resolution and the dynamic range of a Brillouin based optical spectrum analyzer are enhanced significantly. Second, a new technique for the storage of optical data packets, called Quasi-Light-Storage, is introduced and the maximum storage time is increased to 160 ns for 8 bit data packets. Finally, Brillouin scattering is used for the processing of optical frequency combs, leading to the generation high quality of mm- and THz-waves, as well as almost ideal sinc-shaped Nyquist pulse sequences.
Download or read book Stimulated Brillouin Scattering written by M J Damzen and published by CRC Press. This book was released on 2003-09-01 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stimulated Brillouin scattering (SBS) is the most important example of a stimulated scattering process-light scattering that occurs when the intensity of the light field itself affects the propagating medium. A phenomenon that has been known of for some 35 years in solid state laser research, it has recently become relevant in the optical fiber ind
Download or read book Theoretical Investigation of Stimulated Brillouin Scattering in Optical Fibers and Their Applications written by Daisy Williams and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1920, Leon Brillouin discovered a new kind of light scattering --Brillouin scattering --which occurs as a result of the interaction of light with a transparent material's temporal periodic variations in density and refractive index. Many advances have since been made in the study of Brillouin scattering, in particular in the field of fiber optics. An in-depth investigation of Brillouin scattering in optical fibers has been carried out in this thesis, and the theory of stimulated Brillouin scattering (SBS) and combined Brillouin gain and loss has been extended. Additionally, several important applications of SBS have been found and applied to current technologies. Several mathematical models of the pump-probe interaction undergoing SBS in the steady-state regime have emerged in recent years. Attempts have been made to find analytical solutions of this system of equations, however, previously obtained solutions are numerical with analytical portions and, therefore, qualify as hybrid solutions. Though the analytical portions provide useful information about intensity distributions along the fiber, they fall short of describing the spectral characteristics of the Brillouin amplification and the lack of analytical expressions for Brillouin spectra substantially limits the utility of the hybrid solutions for applications in spectral measurement techniques. In this thesis, a highly accurate, fully analytic solution for the pump wave and the Stokes wave in Brillouin amplification in optical fibers is given. It is experimentally confirmed that the reported analytic solution can account for spectral distortion and pump depletion in the parameter space that is relevant to Brillouin fiber sensor applications. The analytic solution provides a valid characterization of Brillouin amplification in both the low and high nonlinearity regime, for short fiber lengths. Additionally, a 3D parametric model of Brillouin amplification is proposed, which reflects the effects of input pump and Stokes powers on the level of pump wave depletion in the fiber, and acts as a classification tool to describe the level of similarity between various Brillouin amplification processes in optical fibers. At present, there exists a multitude of electro-optic modulators (EOM), which are used to modulate the amplitude, frequency, phase and polarization of a beam of light. Among these modulators, phase modulation provides the highest quality of transmitted signal. As such, an improved method of phase-modulation, based on the principles of stimulated Brillouin scattering, as well as an optical phase-modulator and optical phase network employing the same, has been developed. Due to its robustness, low threshold power, narrow spectrum and simplicity of operation, stimulated Brillouin scattering (SBS) has become a favourable underlying mechanism in fiber-based devices used for both sensing and telecommunication applications. Since birefringence is a detrimental effect for both, it is important to devise a comprehensive characterization of the SBS process in the presence of birefringence in an optical fiber. In this thesis, the most general model of elliptical birefringence in an optical fiber has been developed for a steady-state and transient stimulated Brillouin scattering (SBS) interaction, as well as the combined Brillouin gain and loss regime. The impact of the elliptical birefringence is to induce a Brillouin frequency shift and distort the Brillouin spectrum --which varies with different light polarizations and pulse widths. The model investigates the effects of birefringence and the corresponding evolution of spectral distortion effects along the fiber, and proposes regimes that are more favourable for sensing applications related to SBS --providing a valuable prediction tool for distributed sensing applications. In recent years, photonic computing has received considerable attention due to its numerous applications, such as high-speed optical signal processing, which would yield much faster computing times and higher bandwidths. For this reason, optical logic has been the focus of many research efforts and several schemes to improve conventional logic gates have been proposed. In view of this, a combined Brillouin gain and loss process has been proposed in a polarization maintaining optical fiber to realize all-Optical NAND/NOT/AND/OR logic gates in the frequency domain. A model describing the interaction of a Stokes, anti-Stokes and a pump wave, and two acoustic waves inside a fiber, ranging in length from 350m-2300m, was used to theoretically model the gates. Through the optimization of the pump depletion and gain saturation in the combined gain and loss process, switching contrasts of 20-83% have been simulated for different configurations.
Download or read book Forward Brillouin Scattering in Standard Optical Fibers written by Avi Zadok and published by Springer Nature. This book was released on 2022-10-19 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, the first dedicated to the topic, provides a comprehensive treatment of forward stimulated Brillouin scattering (SBS) in standard optical fibers. SBS interactions between guided light and sound waves have drawn much attention for over fifty years, and optical fibers provide an excellent playground for the study of Brillouin scattering as they support guided modes of both wave types and provide long interaction lengths. This book is dedicated to forward SBS processes that are driven by co-propagating optical fields. The physics of forward SBS is explained in detail, starting from the fundamentals of interactions between guided optical and acoustic waves, with emphasis given to the acoustic modes that are stimulated in the processes. The realization of forward SBS in standard single-mode, polarization-maintaining and multi-core fibers is then discussed in depth. Innovative potential applications in sensors, monitoring of coating layers, lasers, and radio-frequency oscillators are presented. This book introduces the subject to graduate students in optics and applied physics, and it will be of interest to scientists working in fiber-optics, nonlinear optics and opto-mechanics. Provides the first treatment of forward stimulated Brillouin scattering (SBS) in book form; Reflects the dramatic recent increase in interest in forward SBS processes , driven in part by the promise of new fiber sensing concepts; Delivers a solid and comprehensive grounding in the physics of forward SBS along with detailed experimental set-ups, measurement protocols, and applications.
Download or read book Optical Fiber Sensor Technology written by L.S. Grattan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in optical fiber sensors The field of optical fiber sensor technology is one that continues to expand and develop at a rate that could barely have been predicted a few years ago. The wealth of publications appearing in the technical literature and the burgeoning number of papers presented at the now well-established series of national and international conferences, which are attended by a wide selection of technically qualified optoelectronics professionals, gives a clear indication of both the range and scale of the devices and applications now seen in the subject. Such a rapid expansion makes it very difficult for the scientist and engineer, under pressure to be both informed and effective for an employer, to attend all these meetings, selectively read the appropriate literature and be able quickly to gain the knowledge in those specific areas which will give the best advantage for the work in hand. To that end, this volume has been planned and carefully designed to provide an essential overview, and detailed specific information, on those novel and exciting aspects of optical fiber sensor technology that have recently emerged, with particular focus on the devices and the exciting applications of this part of optoelectronic technology in the vast international measurement and instrumentation area.
Download or read book Brillouin Scattering Part 2 written by and published by Academic Press. This book was released on 2022-08-27 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brillouin Scattering, Part Two, Volume 110 in the Semiconductors and Semimetal series, marks the centenary of Leon Brillouin's seminal 1922 paper which provided a detailed theory on the effect that now bears his name. Sections in this new release include Optical Fiber Sensors Based on Stimulated Brillouin scattering, Brillouin-based RF frequency sources, SBS for Microwave Photonics (MWP), Engineerable Brillouin processes for integrated photonics, SBS in optical communication systems - the good, the bad and the ugly, Slow light, dynamic gratings and light storage, Non-reciprocity in Brillouin scattering, Electromechanical Brillouin Scattering, and Brillouin light scattering for studying mechanics of biological systems. Stimulated Brillouin Scattering (SBS) is the strongest third order nonlinearity and plays an important role in contemporary science and applications, particularly lasers, communications, fiber optics and basic physics. This volume provides different perspectives on current technological contexts of SBS in a range of different application areas, including sensing, communications, radar, imaging and information storage. - Presented by the leading researchers in the field - Covers both scientific and technological perspectives - Provides different perspectives on current technological contexts of SBS in a range of different application areas, including sensing, communications, radar, imaging and information storage
Download or read book Stimulated Brillouin Scattering in Single mode Optical Fiber written by Michael Andrew Davis and published by . This book was released on 1997 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Brillouin Dynamic Gratings in Optical Fibres for Distributed Sensing and Advanced Optical Signal Processing written by and published by . This book was released on 2015 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mots-clés de l'auteur: fibre optics ; nonlinear fibre optics ; Brillouin scattering ; Brillouin dynamic grating ; optical fibre sensors ; optical signal processing.
Download or read book Nonlinear Fiber Optics written by Govind P. Agrawal and published by Academic Press. This book was released on 2007 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the 3rd edition appeared, a fast evolution of the field has occurred. The fourth edition of this classic work provides an up-to-date account of the nonlinear phenomena occurring inside optical fibers. The contents include such important topics as self- and cross-phase modulation, stimulated Raman and Brillouin scattering, four-wave mixing, modulation instability, and optical solitons. Many new figures have been added to help illustrate the concepts discussed in the book. New to this edition are chapters on highly nonlinear fibers and and the novel nonlinear effects that have been observed in these fibers since 2000. Such a chapter should be of interest to people in the field of new wavelengths generation, which has potential application in medical diagnosis and treatments, spectroscopy, new wavelength lasers and light sources, etc. Continues to be industry bestseller providing unique source of comprehensive coverage on the subject of nonlinear fiber optics Fourth Edition is a completely up-to-date treatment of the nonlinear phenomena occurring inside optical fibers Includes 2 NEW CHAPTERS on the properties of highly nonlinear fibers and their novel nonlinear effects
Download or read book Study on Brillouin Scattering in Optical Fibers with Emphasis on Sensing Applications written by Jeffrey Snoddy and published by . This book was released on 2009 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Optical Fiber Technology written by Moh Yasin and published by BoD – Books on Demand. This book was released on 2015-02-25 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a compilation of works presenting recent developments and practical applications in optical fiber technology. It contains 13 chapters from various institutions that represent global research in various topics such as scattering, dispersion, polarization interference, fuse phenomena and optical manipulation, optical fiber laser and sensor applications, passive optical network (PON) and plastic optical fiber (POF) technology. It provides the reader with a broad overview and sampling of the innovative research on optical fiber technologies.
Download or read book Optical Fibre Sensing and Signal Processing written by B. Culshaw and published by Institution of Electrical Engineers. This book was released on 1984 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the potential of this powerful technology and demonstrates where the electronics and the mechanical engineering can play their part in the design of a real practical system.
Download or read book Handbook of Optoelectronics written by John P. Dakin and published by CRC Press. This book was released on 2017-10-05 with total page 444 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. 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 Distributed Brillouin sensor in polymer optical fibers utilizing BOFDA written by Andy Schreier and published by Cuvillier Verlag. This book was released on 2020-01-24 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, a distributed Brillouin sensor in perfluorinated polymer optical fibers utilizing BOFDA is presented. These commercially available polymer fibers offer beneficial characteristics for sensing applications such as higher break down strain up to 100 %, minimal bending radii below 2 mm, higher sensitivity to temperature and lower sensitivity to strain compared to their silica equivalent. The SBS parameters - backscattering power, linewidth and frequency shift - are inclusively related to the environmental parameters humidity, temperature and tensile strain. Furthermore, the perfluorinated polymer optical fibers are characterized with respect to the influence of relative humidity and temperature changes on spectral transmission absorption and Rayleigh backscattering, respectively. The chosen wavelength of operation at 1319 nm corresponds to lower fiber propagation loss (
Download or read book Brillouin Scattering in Photonic Crystal Fiber written by Birgit Stiller and published by . This book was released on 2011 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brillouin scattering is a fundamental nonlinear opto-acoustic interaction present in optical fibers with important implications in fields ranging from modern telecommunication networks to smart optical fiber sensors. This thesis is aimed at providing a comprehensive theoretical and experimental investigation of both forward and backward Brillouin scattering in next generation photonic crystal fibers in view of potential applications to above mentioned fields. We show in particular that these micro-structured optical fibers have the remarkable ability to either suppress or enhance photon-phonon interactions compared to what is commonly observed in conventional fibers. Firstly, this thesis provides a complete experimental characterization of several photonic crystal fibers using a novel highly-resolved distributed sensing technique based on Brillouin echoes. We perform distributed measurements that show both short-scale and long-scale longitudinal fluctuations of the periodic wavelength-scale air-hole microstructure along the fibers. Our mapping technique is very sensitive to structural irregularities and thus interesting for fiber manufacturers to characterize and improve the fiber uniformity during the drawing process. With this technique, we also report the first experimental observationof the acoustic decay time and the Brillouin linewidth broadening in both standard and photonic crystal fibers. Furthermore, we experimentally demonstrate a simplified architecture of our Brillouin echoes-based distributed optical fiber sensor with centimeter spatial resolution. It is based on differential phase-shift keying technique using a single Mach-Zehnder modulator to generate a pump pulse and a _-phase-shifted pulse with an easy and accurate adjustment of delay. These sensing techniques are also applied to distributed strain measurement. Another aspect of this thesis is the investigation of a novel method for suppressing stimulated Brillouin scattering that is detrimental to optical fiber transmissions and fiber lasers. We experimentally study several fibers and a demonstrate 4 dB increase of the Brillouin threshold in a photonic crystal fiber by varying periodically the core diameter by only7%. The efficiency of this passive technique is verified by use of our distributed sensing technique where the oscillating Brillouin frequency shift is clearly observed.Lastly, we present experimental and numerical results demonstrating the simultaneous vi Abstract frequency-selective excitation of several guided acoustic Brillouin modes in a photonic crystal fiber with a multi-scale structure design. These guided acoustic modes are identified by using a full vector finite-element model to result from elastic radial vibrations confined by the air-silica microstructure. We further show the strong impact of structural irregularities of the fiber on the frequency and modal shape of these acoustic resonances.
