Spectrum Engineering Of Stimulated Brillouin Scattering In Distributed Fiber Sensing And Optical Signal Processing
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Spectrum Engineering Of Stimulated Brillouin Scattering In Distributed Fiber Sensing And Optical Signal Processing
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Author : Cheng Feng
language : en
Publisher: Cuvillier Verlag
Release Date : 2020-12-03
Spectrum Engineering Of Stimulated Brillouin Scattering In Distributed Fiber Sensing And Optical Signal Processing written by Cheng Feng and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-03 with Technology & Engineering categories.
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.
Theoretical Investigation Of Stimulated Brillouin Scattering In Optical Fibers And Their Applications
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Author : Daisy Williams
language : en
Publisher:
Release Date : 2013
Theoretical Investigation Of Stimulated Brillouin Scattering In Optical Fibers And Their Applications written by Daisy Williams and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with University of Ottawa theses categories.
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.
Stimulated Brillouin Scattering Based Optical Signal Processing For Fiber Optic Communications And Sensing
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Author : Liang Wang (Ph. D.)
language : en
Publisher:
Release Date : 2013
Stimulated Brillouin Scattering Based Optical Signal Processing For Fiber Optic Communications And Sensing written by Liang Wang (Ph. D.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Brillouin scattering categories.
Optical signal processing based on fiber nonlinearities plays an important role in both fiber-optic communications and sensing. Among various nonlinear effects, stimulated Brillouin scattering (SBS) in optical fibers has been widely employed not only in processing of high-speed communication signals, but also in constructing fiber-optic sensors. This thesis investigates new techniques of optical signal processing based on SBS for fiber-optic communications and sensing.
Smart Sensors For Industrial Applications
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Author : Krzysztof Iniewski
language : en
Publisher: CRC Press
Release Date : 2017-12-19
Smart Sensors For Industrial Applications written by Krzysztof Iniewski and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-19 with Technology & Engineering categories.
Sensor technologies are a rapidly growing area of interest in science and product design, embracing developments in electronics, photonics, mechanics, chemistry, and biology. Their presence is widespread in everyday life, where they are used to sense sound, movement, and optical or magnetic signals. The demand for portable and lightweight sensors is relentless in several industries, from consumer electronics to biomedical engineering to the military. Smart Sensors for Industrial Applications brings together the latest research in smart sensors technology and exposes the reader to myriad applications that this technology has enabled. Organized into five parts, the book explores: Photonics and optoelectronics sensors, including developments in optical fibers, Brillouin detection, and Doppler effect analysis. Chapters also look at key applications such as oxygen detection, directional discrimination, and optical sensing. Infrared and thermal sensors, such as Bragg gratings, thin films, and microbolometers. Contributors also cover temperature measurements in industrial conditions, including sensing inside explosions. Magnetic and inductive sensors, including magnetometers, inductive coupling, and ferro-fluidics. The book also discusses magnetic field and inductive current measurements in various industrial conditions, such as on airplanes. Sound and ultrasound sensors, including underwater acoustic modem, vibrational spectroscopy, and photoacoustics. Piezoresistive, wireless, and electrical sensors, with applications in health monitoring, agrofood, and other industries. Featuring contributions by experts from around the world, this book offers a comprehensive review of the groundbreaking technologies and the latest applications and trends in the field of smart sensors.
Fiber Optic Sensing
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Author : Shien-Kuei Liaw
language : en
Publisher: BoD – Books on Demand
Release Date : 2019-09-11
Fiber Optic Sensing written by Shien-Kuei Liaw and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-09-11 with Science categories.
The chapters in this edited volume are by scholars/experts working in academia in Taiwan, Egypt, Israel, Germany and Japan. The contents are intended to provide a common forum for researchers, scientists and engineers throughout the world to exchange ideas and gain knowledge in the areas of fiber sensing technologies. The scope of the book includes the following chapters: 1. Introductory Chapter: An Overview of the Methodologies and Applications of Fiber Optic Sensing; 2. Theoretic Study of Cascaded Fiber Bragg Grating; 3. Femtosecond Transient Bragg Gratings; 4. Vital Sign Measurement Using FBG Sensor for New Wearable Sensor; 5. The State-of-the-Art of Brillouin Distributed Fiber Sensing. After a rigorous review process, the editors selected five submitted manuscripts (Chapters 2 to 5) for inclusion here. Three of these focus on the subject of point-to-point sensing using FBGs, and the final concerns distributed fiber sensing based on Brillouin scattering effect.
Advances In Optical Fiber Technology
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Author : Moh Yasin
language : en
Publisher: BoD – Books on Demand
Release Date : 2015-02-25
Advances In Optical Fiber Technology written by Moh Yasin and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-25 with Technology & Engineering categories.
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.
Study On Brillouin Scattering In Optical Fibers With Emphasis On Sensing Applications
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Author : Jeffrey Snoddy
language : en
Publisher:
Release Date : 2009
Study On Brillouin Scattering In Optical Fibers With Emphasis On Sensing Applications written by Jeffrey Snoddy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Brillouin scattering categories.
Novel Optical Fiber Sensing Technology And Systems
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Author : Mingjiang Zhang
language : en
Publisher: Springer Nature
Release Date : 2024-01-03
Novel Optical Fiber Sensing Technology And Systems written by Mingjiang Zhang and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-01-03 with Science categories.
This book highlights recent advances in novel optical fiber sensing technology and systems, using distributed fiber sensing technology based on chaotic lasers. Upon introducing the basic theory of chaotic laser, a novel light source, the book summarizes new frontier technologies, and presents photonic integration and sensing applications. The book elaborates on new technologies of distributed optical fiber sensors and its engineering applications, as well as narrow-linewidth fiber laser for optical fiber sensing. This book is of great reference for researchers and professionals in the area of optics and optoelectronics.
Optical Fiber Sensor Technology
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Author : K. T. V. Grattan
language : en
Publisher:
Release Date : 1995
Optical Fiber Sensor Technology written by K. T. V. Grattan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Electron optics categories.
Distributed Optical Fiber Sensing
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Author : Luc Thevenaz
language : en
Publisher: Wiley
Release Date : 2012-03
Distributed Optical Fiber Sensing written by Luc Thevenaz and has been published by Wiley this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-03 with Technology & Engineering categories.
Serving as a unique, efficient solution to modern demands for security and safety sensing, distributed optical fiber sensing are critical components in areas such as natural disaster prevention and civil engineering. The unique book provides detailed explanations on how to install early warning systems for the prevention of natural disasters, flaws in civil engineering structures (dams, bridges, tunnels), and issues in the oil industry (pipeline leakage detection, off-shore platform anchoring.) Addressing the principles and specificities of distributed fiber sensing, this resource shows different possible implementations, their potential, and their limitations.