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Books > Science & Mathematics > Physics > Optics (light)

Tests of Lorentz Invariance with an Optical Ring Cavity (Paperback, Softcover reprint of the original 1st ed. 2017): Yuta... Tests of Lorentz Invariance with an Optical Ring Cavity (Paperback, Softcover reprint of the original 1st ed. 2017)
Yuta Michimura
R3,322 Discovery Miles 33 220 Ships in 10 - 15 working days

This thesis describes one of the most precise experimental tests of Lorentz symmetry in electrodynamics by light-speed anisotropy measurement with an asymmetric optical ring cavity. The author aims to answer the fundamental, hypothetical debate on Lorentz symmetry in the Universe. He concludes that the symmetry is protected within an error of 10-15, which means providing one of the most stringent upper limits on the violation of the Lorentz symmetry in the framework of the Standard Model Extension. It introduces the following three keys which play an important role in achieving high-precision measurement: (1) a high-index element (silicon) interpolated into part of the light paths in the optical ring cavity, which improves sensitivity to the violation of the Lorentz symmetry, (2) double-pass configuration of the interferometer, which suppresses environmental noises, and (3) continuous data acquisition by rotating the optical ring cavity, which makes it possible to search for higher-order violations of Lorentz symmetry. In addition to those well-described keys, a comprehensive summary from theoretical formulations to experimental design details, data acquisition, and data analysis helps the reader follow up the experiments precisely.

Negative Frequency at the Horizon - Theoretical Study and Experimental Realisation of Analogue Gravity Physics in Dispersive... Negative Frequency at the Horizon - Theoretical Study and Experimental Realisation of Analogue Gravity Physics in Dispersive Optical Media (Hardcover, 1st ed. 2018)
Maxime Jacquet
R3,815 Discovery Miles 38 150 Ships in 10 - 15 working days

This book is part of a large and growing body of work on the observation of analogue gravity effects, such as Hawking radiation, in laboratory systems. The book is highly didactic, skillfully navigating between concepts ranging from quantum field theory on curved space-times, nonlinear fibre optics and the theoretical and experimental foundations in the physics of optical analogues to the Event Horizon. It presents a comprehensive field-theoretical framework for these systems, including the kinematics governing the fields. This allows an analytical calculation of the all-important conversion of vacuum fluctuations into Hawking radiation. Based on this, emission spectra are computed, providing unique insights into the emissions from a highly dispersive system. In an experimental part, the book develops a clear and systematic way to experimentally approach the problem and demonstrates the construction of an experimental setup and measurements of unprecedented sensitivity in the search for stimulation of the Hawking effect.

Technological Advances in Tellurite Glasses - Properties, Processing, and Applications (Paperback, Softcover reprint of the... Technological Advances in Tellurite Glasses - Properties, Processing, and Applications (Paperback, Softcover reprint of the original 1st ed. 2017)
V.A.G. Rivera, Danilo Manzani
R4,502 Discovery Miles 45 020 Ships in 10 - 15 working days

This book is the first to provide a comprehensive introduction to the synthesis, optical properties, and photonics applications of tellurite glasses. The book begins with an overview of tellurite glasses, followed by expert chapters on synthesis, properties, and state-of-the-art applications ranging from laser glass, optical fibers, and optical communications through color tuning, plasmonics, supercontinuum generation, and other photonic devices. The book provides in-depth information on the the structural, linear, and non-linear optical properties of tellurite glasses and their implications for device development. Real-world examples give the reader valuable insight into the applications of tellurite glass. A detailed discussion of glass production methods, including raw materials and melting and refining oxide- and fluoro-tellurite glasses, is also included. The book features an extensive reference list for further reading. This highly readable and didactic text draws on chemical composition, glass science, quantum mechanics, and electrodynamics. It is suitable for both advanced undergraduate and graduate students as well as practicing researchers.

Basics of Laser Physics - For Students of Science and Engineering (Paperback, Softcover reprint of the original 2nd ed. 2017):... Basics of Laser Physics - For Students of Science and Engineering (Paperback, Softcover reprint of the original 2nd ed. 2017)
Karl F. Renk
R2,829 Discovery Miles 28 290 Ships in 10 - 15 working days

This textbook provides an introductory presentation of all types of lasers. It contains a general description of the laser, a theoretical treatment and a characterization of its operation as it deals with gas, solid state, free-electron and semiconductor lasers. This expanded and updated second edition of the book presents a description of the dynamics of free-electron laser oscillation using a model introduced in the first edition that allows a reader to understand basic properties of a free-electron laser and makes the difference to "conventional" lasers. The discussions and the treatment of equations are presented in a way that a reader can immediately follow. The book addresses graduate and undergraduate students in science and engineering, featuring problems with solutions and over 400 illustrations.

A Critical Edition of Ibn al-Haytham's On the Shape of the Eclipse - The First Experimental Study of the Camera Obscura... A Critical Edition of Ibn al-Haytham's On the Shape of the Eclipse - The First Experimental Study of the Camera Obscura (English, Arabic, Greek, Paperback, Softcover reprint of the original 1st ed. 2016)
Dominique Raynaud
R4,640 Discovery Miles 46 400 Ships in 10 - 15 working days

This book provides the first critical edition of Ibn al-Haytham's On the Shape of the Eclipse with English translation and commentary, which records the first scientific analysis of the camera obscura. On the Shape of the Eclipse includes pioneering research on the conditions of formation of the image, in a time deemed to be committed to aniconism. It also provides an early attempt to merge the two branches of Ancient optics-the theory of light and theory of vision. What perhaps most strongly characterizes this treatise is the close interaction of a geometric analysis of light and experimental reasoning. Ibn al-Haytham conducted his experiments in a systematic way by varying all that could be changed: the shape and size of the aperture, the focal length of the camera obscura, the distance and shape of the celestial bodies. This way, he achieved a thorough understanding. This work represents a decisive step in both the history of optics and the application of the experimental method that was just as efficient in medieval Islam as today.

2D Nanoelectronics - Physics and Devices of Atomically Thin Materials (Paperback, Softcover reprint of the original 1st ed.... 2D Nanoelectronics - Physics and Devices of Atomically Thin Materials (Paperback, Softcover reprint of the original 1st ed. 2017)
Mircea Dragoman, Daniela Dragoman
R3,812 Discovery Miles 38 120 Ships in 10 - 15 working days

This book is dedicated to the new two-dimensional one-atomic-layer-thick materials such as graphene, metallic chalcogenides, silicene and other 2D materials. The book describes their main physical properties and applications in nanoelctronics, photonics, sensing and computing. A large part of the book deals with graphene and its amazing physical properties. Another important part of the book deals with semiconductor monolayers such as MoS2 with impressive applications in photonics, and electronics. Silicene and germanene are the atom-thick counterparts of silicon and germanium with impressive applications in electronics and photonics which are still unexplored. Consideration of two-dimensional electron gas devices conclude the treatment. The physics of 2DEG is explained in detail and the applications in THz and IR region are discussed. Both authors are working currently on these 2D materials developing theory and applications.

Advanced Geometrical Optics (Paperback, Softcover reprint of the original 1st ed. 2017): Psang Dain Lin Advanced Geometrical Optics (Paperback, Softcover reprint of the original 1st ed. 2017)
Psang Dain Lin
R7,965 Discovery Miles 79 650 Ships in 10 - 15 working days

This book computes the first- and second-order derivative matrices of skew ray and optical path length, while also providing an important mathematical tool for automatic optical design. This book consists of three parts. Part One reviews the basic theories of skew-ray tracing, paraxial optics and primary aberrations - essential reading that lays the foundation for the modeling work presented in the rest of this book. Part Two derives the Jacobian matrices of a ray and its optical path length. Although this issue is also addressed in other publications, they generally fail to consider all of the variables of a non-axially symmetrical system. The modeling work thus provides a more robust framework for the analysis and design of non-axially symmetrical systems such as prisms and head-up displays. Lastly, Part Three proposes a computational scheme for deriving the Hessian matrices of a ray and its optical path length, offering an effective means of determining an appropriate search direction when tuning the system variables in the system design process.

Chiral Nanophotonics - Chiral Optical Properties of Plasmonic Systems (Paperback, Softcover reprint of the original 1st ed.... Chiral Nanophotonics - Chiral Optical Properties of Plasmonic Systems (Paperback, Softcover reprint of the original 1st ed. 2017)
Martin Schaferling
R4,210 Discovery Miles 42 100 Ships in 10 - 15 working days

This book describes the physics behind the optical properties of plasmonic nanostructures focusing on chiral aspects. It explains in detail how the geometry determines chiral near-fields and how to tailor their shape and strength. Electromagnetic fields with strong optical chirality interact strongly with chiral molecules and, therefore, can be used for enhancing the sensitivity of chiroptical spectroscopy techniques. Besides a short review of the latest results in the field of plasmonically enhanced enantiomer discrimination, this book introduces the concept of chiral plasmonic near-field sources for enhanced chiroptical spectroscopy. The discussion of the fundamental properties of these light sources provides the theoretical basis for further optimizations and is of interest for researchers at the intersection of nano-optics, plasmonics and stereochemistry.

Quantum Optics - Including Noise Reduction, Trapped Ions, Quantum Trajectories, and Decoherence (Paperback, Softcover reprint... Quantum Optics - Including Noise Reduction, Trapped Ions, Quantum Trajectories, and Decoherence (Paperback, Softcover reprint of the original 3rd ed. 2016)
Miguel Orszag
R3,456 Discovery Miles 34 560 Ships in 10 - 15 working days

This new edition gives a unique and broad coverage of basic laser-related phenomena that allow graduate students, scientists and engineers to carry out research in quantum optics and laser physics. It covers quantization of the electromagnetic field, quantum theory of coherence, atom-field interaction models, resonance fluorescence, quantum theory of damping, laser theory using both the master equation and the Langevin theory, the correlated emission laser, input-output theory with applications to non-linear optics, quantum trajectories, quantum non-demolition measurements and generation of non-classical vibrational states of ions in a Paul trap. In this third edition, there is an enlarged chapter on trapped ions, as well as new sections on quantum computing and quantum bits with applications. There is also additional material included for quantum processing and entanglement. These topics are presented in a unified and didactic manner, each chapter is accompanied by specific problems and hints to solutions to deepen the knowledge.

Applied Research of Quantum Information Based on Linear Optics (Paperback, Softcover reprint of the original 1st ed. 2016):... Applied Research of Quantum Information Based on Linear Optics (Paperback, Softcover reprint of the original 1st ed. 2016)
Xiao-Ye Xu
R3,372 Discovery Miles 33 720 Ships in 10 - 15 working days

This thesis reports on outstanding work in two main subfields of quantum information science: one involves the quantum measurement problem, and the other concerns quantum simulation. The thesis proposes using a polarization-based displaced Sagnac-type interferometer to achieve partial collapse measurement and its reversal, and presents the first experimental verification of the nonlocality of the partial collapse measurement and its reversal. All of the experiments are carried out in the linear optical system, one of the earliest experimental systems to employ quantum communication and quantum information processing. The thesis argues that quantum measurement can yield quantum entanglement recovery, which is demonstrated by using the frequency freedom to simulate the environment. Based on the weak measurement theory, the author proposes that white light can be used to precisely estimate phase, and effectively demonstrates that the imaginary part of the weak value can be introduced by means of weak measurement evolution. Lastly, a nine-order polarization-based displaced Sagnac-type interferometer employing bulk optics is constructed to perform quantum simulation of the Landau-Zener evolution, and by tuning the system Hamiltonian, the first experiment to research the Kibble-Zurek mechanism in non-equilibrium kinetics processes is carried out in the linear optical system.

Power Systems Grounding (Paperback, Softcover reprint of the original 1st ed. 2016): MD Abdus Salam, Quazi M. Rahman Power Systems Grounding (Paperback, Softcover reprint of the original 1st ed. 2016)
MD Abdus Salam, Quazi M. Rahman
R2,712 Discovery Miles 27 120 Ships in 10 - 15 working days

This book provides electrical and electronic engineering undergraduate and graduate students and trainees with practical information on grounding-system parameters, and on different methods for measuring soil resistivity and ground resistance. It also presents some real-world studies, which enhance the learning experience. It discusses electromagnetic field theories to explain ground resistance modeling using different sizes of electrodes. Furthermore it includes CYME GRD software for simulation of soil resistivity and grounding grid design, and considers some fundamental concepts of power systems to clarify other topics related to the grounding system.

Planar Waveguide Optical Sensors - From Theory to Applications (Paperback, Softcover reprint of the original 1st ed. 2016):... Planar Waveguide Optical Sensors - From Theory to Applications (Paperback, Softcover reprint of the original 1st ed. 2016)
Aradhana Dutta, Bidyut Deka, Partha Pratim Sahu
R3,545 Discovery Miles 35 450 Ships in 10 - 15 working days

This book concentrates on the design and development of integrated optic waveguide sensors using silicon based materials. The implementation of such system as a tool for detecting adulteration in petroleum based products as well as its use for detection of glucose level in diabetes are highlighted. The first chapters are dedicated to the development of the theoretical model while the final chapters are focused on the different applications of such sensors. It gives the readers the full background in the field of sensors, reasons for using silicon oxynitride as a potential waveguide material as well as its fabrication processes and possible uses.

Computing Colour Image Processing - Digital Colour Primer (Paperback, 1st ed. 2018): Alan Parkin Computing Colour Image Processing - Digital Colour Primer (Paperback, 1st ed. 2018)
Alan Parkin
R1,514 Discovery Miles 15 140 Ships in 10 - 15 working days

This book proposes a new approach to colour in digital images, based on the standard sRGB colour space and Python scripting. It covers creating, storing, processing, displaying, printing, and viewing colour images. The fundamental ideas presented include systematic reduction of colour resolution to manageable sRGB sub-spaces, analysis of any image as a tabular colour scheme, general transformation and specific substitution of colours, and revival of the traditional notion of a neutral balance by adjusting all colours or by adjoining a colour frame. The text includes Python scripts for the processes discussed, downloadable in the e-book. It is of interest to artists, designers, and anyone who works with sRGB colour images.

Superconducting Devices in Quantum Optics (Paperback, Softcover reprint of the original 1st ed. 2016): Robert Hadfield, Goeran... Superconducting Devices in Quantum Optics (Paperback, Softcover reprint of the original 1st ed. 2016)
Robert Hadfield, Goeran Johansson
R2,948 Discovery Miles 29 480 Ships in 10 - 15 working days

This book presents the basics and applications of superconducting devices in quantum optics. Over the past decade, superconducting devices have risen to prominence in the arena of quantum optics and quantum information processing. Superconducting detectors provide unparalleled performance for the detection of infrared photons in quantum cryptography, enable fundamental advances in quantum optics, and provide a direct route to on-chip optical quantum information processing. Superconducting circuits based on Josephson junctions provide a blueprint for scalable quantum information processing as well as opening up a new regime for quantum optics at microwave wavelengths. The new field of quantum acoustics allows the state of a superconducting qubit to be transmitted as a phonon excitation. This volume, edited by two leading researchers, provides a timely compilation of contributions from top groups worldwide across this dynamic field, anticipating future advances in this domain.

X-Ray Diffraction Imaging of Biological Cells (Hardcover, 1st ed. 2018): Masayoshi Nakasako X-Ray Diffraction Imaging of Biological Cells (Hardcover, 1st ed. 2018)
Masayoshi Nakasako
R5,267 Discovery Miles 52 670 Ships in 10 - 15 working days

In this book, the author describes the development of the experimental diffraction setup and structural analysis of non-crystalline particles from material science and biology. Recent advances in X-ray free electron laser (XFEL)-coherent X-ray diffraction imaging (CXDI) experiments allow for the structural analysis of non-crystalline particles to a resolution of 7 nm, and to a resolution of 20 nm for biological materials. Now XFEL-CXDI marks the dawn of a new era in structural analys of non-crystalline particles with dimensions larger than 100 nm, which was quite impossible in the 20th century. To conduct CXDI experiments in both synchrotron and XFEL facilities, the author has developed apparatuses, named KOTOBUKI-1 and TAKASAGO-6 for cryogenic diffraction experiments on frozen-hydrated non-crystalline particles at around 66 K. At the synchrotron facility, cryogenic diffraction experiments dramatically reduce radiation damage of specimen particles and allow tomography CXDI experiments. In addition, in XFEL experiments, non-crystalline particles scattered on thin support membranes and flash-cooled can be used to efficiently increase the rate of XFEL pulses. The rate, which depends on the number density of scattered particles and the size of X-ray beams, is currently 20-90%, probably the world record in XFEL-CXDI experiments. The experiment setups and results are introduced in this book. The author has also developed software suitable for efficiently processing of diffraction patterns and retrieving electron density maps of specimen particles based on the diffraction theory used in CXDI.

Optical Measurement Mechanics (Paperback): Kaifu Wang Optical Measurement Mechanics (Paperback)
Kaifu Wang
R2,273 R1,713 Discovery Miles 17 130 Save R560 (25%) Ships in 10 - 15 working days

The book introduces the fundamentals of optical measurement mechanics, and discusses different types of interferometry, including (Digital) Holographic Interferometry, (Digital) Speckle Interferometry, Moire Interferometry, Digital Image Correlation and Particle Image Velocimetry. It is an essential reference for graduate students, scientists and practitioners from both universities and research laboratories.

Theoretical Femtosecond Physics - Atoms and Molecules in Strong Laser Fields (Hardcover, 3rd ed. 2018): Frank Grossmann Theoretical Femtosecond Physics - Atoms and Molecules in Strong Laser Fields (Hardcover, 3rd ed. 2018)
Frank Grossmann
R3,682 Discovery Miles 36 820 Ships in 10 - 15 working days

This textbook extends from the basics of femtosecond physics all the way to some of the latest developments in the field. In this updated edition, the chapter on laser-driven atoms is augmented by the discussion of two-electron atoms interacting with strong and short laser pulses, as well as by a review of ATI rings and low energy structures in photo-electron spectra. In the chapter on laser-driven molecules a discussion of 2D infrared spectroscopy is incorporated. Theoretical investigations of atoms and molecules interacting with pulsed lasers up to atomic field strengths on the order of 10^16 W/cm(2) are leading to an understanding of many challenging experimental discoveries. The presentation starts with a brief introduction to pulsed laser physics. The basis for the non-perturbative treatment of laser-matter interaction in the book is the time-dependent Schroedinger equation. Its analytical as well as numerical solution are laid out in some detail. The light field is treated classically and different possible gauges for the field-matter interaction are discussed. Physical phenomena, ranging from paradigmatic Rabi-oscillations in two-level systems to the ionization of atoms, the generation of high-order harmonics, the ionization and dissociation of molecules, as well as the control of chemical reactions are presented and discussed on a fundamental level. In this way, the theoretical background for state of the art experiments with strong and short laser pulses is given. The new text is augmented by several additional exercises and now contains a total of forty-eight problems, whose worked-out solutions are given in the last chapter. In addition, some detailed calculations are performed in the appendices. Furthermore, each chapter ends with references to more specialized literature.

Photonics - An Introduction (Paperback, Softcover reprint of the original 1st ed. 2016): Georg A Reider Photonics - An Introduction (Paperback, Softcover reprint of the original 1st ed. 2016)
Georg A Reider
R1,991 Discovery Miles 19 910 Ships in 10 - 15 working days

This book provides a comprehensive introduction into photonics, from the electrodynamic and quantum mechanic fundamentals to the level of photonic components and building blocks such as lasers, amplifiers, modulators, waveguides, and detectors.The book will serve both as textbook and as a reference work for the advanced student or scientist. Theoretical results are derived from basic principles with convenient, yet state-of-the-art mathematical tools, providing not only deeper understanding but also familiarization with formalisms used in the relevant technical literature and research articles. Among the subject matters treated are polarization optics, pulse and beam propagation, waveguides, light-matter interaction, stationary and transient behavior of lasers, semiconductor optics and lasers (including low-dimensional systems such as quantum wells), detector technology, photometry, and colorimetry. Nonlinear optics are elaborated comprehensively.The book is intended for both students of physics and electronics and scientists and engineers in fields such as laser technology, optical communications, laser materials processing, and medical laser applications who wish to gain an in-depth understanding of photonics.

Polymer and Photonic Materials Towards Biomedical Breakthroughs (Hardcover, 1st ed. 2018): Jasper Van Hoorick, Heidi Ottevaere,... Polymer and Photonic Materials Towards Biomedical Breakthroughs (Hardcover, 1st ed. 2018)
Jasper Van Hoorick, Heidi Ottevaere, Hugo Thienpont, Peter Dubruel, Sandra Van Vlierberghe
R3,740 Discovery Miles 37 400 Ships in 10 - 15 working days

This book offers a complete overview of photonic-enhanced materials from material development to a final photonic biomedical application. It includes fundamental, applied, and industrial photonics. The authors cover synthesis, the modification and the processing of a variety of (bio)polymers including thermoplasts (e.g. polyesters) and hydrogels (e.g. proteins and polysaccharides) for a plethora of applications in the field of optics and regenerative medicine.

The Supercontinuum Laser Source - The Ultimate White Light (Paperback, Softcover reprint of the original 3rd ed. 2016): Robert... The Supercontinuum Laser Source - The Ultimate White Light (Paperback, Softcover reprint of the original 3rd ed. 2016)
Robert R. Alfano
R5,809 Discovery Miles 58 090 Ships in 10 - 15 working days

This is the third edition of a well-known classic on ultrafast nonlinear and linear processes responsible for supercontinuum generation. Part I of the book reviews the progress achieved in experimental and theoretical understanding of the field, and goes over the applications developed since the discovery of the supercontinuum effect. The second part of the book covers recent research activity on supercontinuum phenomena and advances achieved since the publication of the previous edition. The new chapters specifically focus on: normal dispersion photonic band gap fibers; coherence in the supercontinuum; supercontinuum in the UV, NIR, and IR; and supercontinuum in XUV and X-rays for attosecond pulses. The Supercontinuum Laser Source is a definitive work by one of the discoverers of the white light effect. It is indispensable reading for any researcher or student working in the field of ultrafast laser physics.

Photoptics 2014 - Proceedings of the 2nd International Conference on Photonics, Optics and Laser Technology Revised Selected... Photoptics 2014 - Proceedings of the 2nd International Conference on Photonics, Optics and Laser Technology Revised Selected Papers (Paperback, Softcover reprint of the original 1st ed. 2016)
Paulo A. Ribeiro, Maria Raposo
R2,957 Discovery Miles 29 570 Ships in 10 - 15 working days

This collection of the selected papers presented to the Second International Conference on Photonics, Optics and laser technology PHOTOPTICS 2014 covers the three main conference scientific areas of "Optics", "Photonics" and "Lasers". The selected papers, in two classes full and short, result from a double blind review carried out by conference Program Committee members who are highly qualified experts in the conference topic areas.

Fundamentals of Electrical Circuit Analysis (Hardcover, 1st ed. 2018): MD Abdus Salam, Quazi Mehbubar Rahman Fundamentals of Electrical Circuit Analysis (Hardcover, 1st ed. 2018)
MD Abdus Salam, Quazi Mehbubar Rahman
R6,424 Discovery Miles 64 240 Ships in 10 - 15 working days

This book is designed as an introductory course for undergraduate students, in Electrical and Electronic, Mechanical, Mechatronics, Chemical and Petroleum engineering, who need fundamental knowledge of electrical circuits. Worked out examples have been presented after discussing each theory. Practice problems have also been included to enrich the learning experience of the students and professionals. PSpice and Multisim software packages have been included for simulation of different electrical circuit parameters. A number of exercise problems have been included in the book to aid faculty members.

Infrared Antireflective and Protective Coatings (Hardcover): Jiaqi Zhu, Jie-Cai Han Infrared Antireflective and Protective Coatings (Hardcover)
Jiaqi Zhu, Jie-Cai Han; Contributions by National Defense Industry Press
R6,462 Discovery Miles 64 620 Ships in 10 - 15 working days

This book is a comprehensive introduction on infrared anti-transparent materials and their applications in anti-reflective and protective coatings. Optical, mechanical and thermal properties and preparations of various kinds of films, such as amorphous diamond films, germanium carbide films, boron phosphide films, alumina films and yttrium oxide film are discussed in detail making it suitable for material scientists and industrial engineers.

Polymer Optical Fiber Bragg Gratings - Fabrication and Sensing Applications (Hardcover): Ricardo Oliveira, Lucia Maria Botas... Polymer Optical Fiber Bragg Gratings - Fabrication and Sensing Applications (Hardcover)
Ricardo Oliveira, Lucia Maria Botas Bilro, Rogerio Nogueira
R4,435 Discovery Miles 44 350 Ships in 12 - 17 working days

Polymer optical fibers (POFs) have been regarded as a viable alternative to silica fibers in a variety of sensing applications. Fiber optic sensors offer key advantages over other sensing technologies, which include immunity to electromagnetic interference, compact, lightweight, multiplexing capability, and higher sensitivity. This book gives an overview of the polymer optical fiber Bragg grating (POFBG) technology over the last 20 years, covering aspects related to the fiber Bragg grating fabrication and also sensing applications. The book is split into five chapters, and it is written in such a way that can provide a comprehensive and simple route to new users, scientists and engineers working or wishing to work in the field of POFBGs: Describes the systems commonly employed for producing fiber Braggs gratings (FBGs) in silica fibers that can be used for the production of POFBGs; Explores different laser sources for the inscription of POFBGs; Explores the capability of using this technology at the visible and infrared region, in different fiber types (e.g., step-index, microstructured, unclad, highly birefringent) and in fibers composed of different polymer materials such as PMMA, doped PMMA, PS and ZEONEX; Reports the fabrication of different types of POF gratings, such as uniform, phase-shifted, tilted, chirped, and long-period gratings; Shows the opportunities of POFBGs for a variety of sensing applications. The insight to the use of POFBGs provides a vision for the opportunities of this fiber optic technology.

Sparsity-Based Multipath Exploitation for Through-the-Wall Radar Imaging (Hardcover, 1st ed. 2018): Michael Leigsnering Sparsity-Based Multipath Exploitation for Through-the-Wall Radar Imaging (Hardcover, 1st ed. 2018)
Michael Leigsnering
R2,957 Discovery Miles 29 570 Ships in 10 - 15 working days

This thesis reports on sparsity-based multipath exploitation methods for through-the-wall radar imaging. Multipath creates ambiguities in the measurements provoking unwanted ghost targets in the image. This book describes sparse reconstruction methods that are not only suppressing the ghost targets, but using multipath to one's advantage. With adopting the compressive sensing principle, fewer measurements are required for image reconstruction as compared to conventional techniques. The book describes the development of a comprehensive signal model and some associated reconstruction methods that can deal with many relevant scenarios, such as clutter from building structures, secondary reflections from interior walls, as well as stationary and moving targets, in urban radar imaging. The described methods are evaluated here using simulated as well as measured data from semi-controlled laboratory experiments.

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