Download or read book Digital Frequency Domain Multiplexer for Mm Wavelength Telescopes written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An FPGA based digital signal processing (DSP) system for biasing and reading out multiplexed bolometric detectors for mm-wavelength telescopes is presented. This readout system is being deployed for balloon-borne and ground based cosmology experiments with the primary goal of measuring the signature of inflation with the Cosmic Microwave Background Radiation. The system consists of analog superconducting electronics running at 250 mK and 4 K, coupled to digital room temperature backend electronics described here. The digital electronics perform the real time functionality with DSP algorithms implemented in firmware. A soft embedded processor provides all of the slow housekeeping control and communications. Each board in the system synthesizes multi-frequency combs of 8 to 32 carriers in the MHz band to bias the detectors. After the carriers have been modulated with the sky-signal by the detectors, the same boards digitize the comb directly. The carriers are mixed down to base-band and low pass filtered. The signal bandwidth of 0.050Hz-100 Hz places extreme requirements on stability and requires powerful filtering techniques to recover the sky-signal from the MHz carriers.
Download or read book Wavelength Division Multiplexing written by Kevin Roebuck and published by Tebbo. This book was released on 2011-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (colours) of laser light. This technique enables bidirectional communications over one strand of fiber, as well as multiplication of capacity. This book is your ultimate resource for Wavelength-Division Multiplexing (WDM). Here you will find the most up-to-date information, analysis, background and everything you need to know. In easy to read chapters, with extensive references and links to get you to know all there is to know about Wavelength-Division Multiplexing (WDM) right away, covering: Wavelength-division multiplexing, Optical fiber, Optical amplifier, Arrayed waveguide grating, Optical attenuator, Bend radius, Buffer (optical fiber), Cable jetting, Optical fiber cable, Chiral Photonics, Cladding (fiber optics), Cladding mode, ClearCurve, Cleave (fiber), Concentricity error, Core (optical fiber), Coupling loss, Cross-phase modulation, Cutback technique, Delay line interferometer, Distributed Bragg reflector, Distributed temperature sensing, Effective mode volume, Equilibrium mode distribution, Fanout cable, Fiber laser, Fiber Management System, Fiber optic coupler, Fiber optic sensor, Fiber pigtail, Fiberscope, Fizoptika, Fusion splicing, Glow plate, Gradient-index optics, Guided ray, Fibre optic gyroscope, Half Acceptance angle, George Hockham, Hydrogen darkening, Hydroxyl ion absorption, Index-matching material, Interconnect bottleneck, Narinder Singh Kapany, Kingfisher International Pty Ltd, Launch angle, Launch numerical aperture, Leaky mode, Manakov system, Mandrel wrapping, Material dispersion coefficient, Mechanical splice, Microducts, Modal dispersion, Mode field diameter, Mode scrambler, Mode volume, Tsuneo Nakahara, Normalized frequency (fiber optics), Numerical aperture, Open fiber control, Optic crystals, Optical power meter, Optical time-domain reflectometer, Optical train, Optomechanics, Ovality, Overfill, Power-law index profile, Radiation angle, Radiation mode, Radiation pattern, Radio over Fiber, Ray (optics), Recoating, Reference surface, Refractive index contrast, Refractive index profile, Return loss, Solar photonics, Split-step method, Step-index profile, Stripping (fiber), Substitution method, Subwavelength-diameter optical fibre, Thunderbolt (interface), Zero-dispersion wavelength, Multiplexing, 12-channel carrier system, Acoustic telegraphy, Bias tee, Carrier interferometry, Carrier recovery, Carrier system, Central Office Multiplexing, Channel bank, Chirp spread spectrum, Code division multiple access, D4 framing standard, Demultiplexer (media file), DHEC, Digital Circuit Multiplication Equipment, Digital multiplex hierarchy, Digital Multiplex System, Digital Signal 1, Digital Signal Designation, Digital Subscriber Line Access Multiplexer, Digital transmission group, Digroup, DMS-100, Drop and insert, DS1C, DS4/NA, E-carrier, Equivalent pulse code modulation noise, Extended Super Frame, Extended superframe, Frequency grid, Frequency-division multiplexing, Frequency-hopping spread spectrum, Generic Framing Procedure, Guard interval, Inverse multiplexer, Inverse Multiplexing for ATM, L-carrier, Link Capacity Adjustment Scheme, Modified AMI code, MPX filter, Multiplexer, Optical add-drop multiplexer, Orthogonal frequency-division multiplexing, Pair gain, PCM30, Plesiochronous Digital Hierarchy, Pulse-code modulation, Shared medium, Spread spectrum, Statistical time division multiplexing, Subcarrier multiplexing, Superframe, Surpass hiT...and much more This book explains in-depth the real drivers and workings of Wavelength-Division Multiplexing (WDM). It reduces the risk of your technology, time and resources investment decisions by enabling you to compare your understanding of Wavelength-Division Multiplexing (WDM) with the objectivity of experienced professionals.
Download or read book Coarse Wavelength Division Multiplexing written by Marcus Nebeling and published by CRC Press. This book was released on 2018-10-08 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explaining what CWDM is, how it is achieved, and why it should be deployed, Coarse Wavelength Division Multiplexing: Technologies and Applications merges coverage of isolated aspects of Coarse Wavelength Division Multiplexing (CWDM) traditionally found as device-related or specific system topics. Emphasizing cost savings and performance enhancement, the book integrates information on component issues, system architectures, concepts for extensions and upgrades, as well as practical applications into a comprehensive, single-volume resource. Beginning with a summary of the ITU-T standards defining CWDM, the book addresses the three essential component classes, optical fibers, transceivers, and WDM filters, which combine to form the basis for the CWDM transmission link. The following chapters include coverage of different architectures such as hubbed rings and meshed networks, and upgrade paths to overcome limitations of current CWDM systems. The book outlines the feasibility of optically amplified CWDM systems, investigates the challenges present with high-speed CWDM and bidirectional transmission, and finally elucidates the importance of CWDM for a wide range of applications. Each chapter provides sufficient information to be used independently and contains references to relevant papers and articles for further study. The last sections of the book focus on applications and case studies where CWDM plays an ever-increasing role. They include extensive studies on networking, reach extension by amplification, and the latest concepts of transmission capacity upgrades using increased bit-rates or new channel plans. Filled with practical information, the book provides a clear understanding of recent developments in the dynamic field of CWDM.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Millimeter Submillimeter and Far infrared Detectors and Instrumentation for Astronomy VII written by and published by . This book was released on 2014 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reports on Astronomy written by Immo Appenzeller and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: IAU Transactions are published as a volume corresponding to each General Assembly. Volume A is produced prior to the Assembly and contains Reports on Astronomy, prepared by each Commission President. The intention is to summarize the astronomical results that have affected the work of the Commission since the production of the previous Reports up to a time which is about one year prior to the General Assembly. Volume B is produced after the Assembly and contains accounts of Commission Meetings which were held, together with other material. The reports included in the present volume range from outline summaries to lengthy compilations and references. Most reports are in English.
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Technology MMW Radio and Terahertz Telescopes written by Thomas G. Phillips and published by . This book was released on 1998 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection of works on MMW, radio, and terahertz telescopes features 80 papers on topics within this field, including the laser micromachining of silicon as a method of manufacturing terahertz imaging arrays, and multipliers for terahertz local oscillators.
Download or read book Conference Proceedings written by and published by . This book was released on 1999 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Particle Detection and Imaging written by Claus Grupen and published by Springer Science & Business Media. This book was released on 2012-01-08 with total page 1251 pages. Available in PDF, EPUB and Kindle. Book excerpt: The handbook centers on detection techniques in the field of particle physics, medical imaging and related subjects. It is structured into three parts. The first one is dealing with basic ideas of particle detectors, followed by applications of these devices in high energy physics and other fields. In the last part the large field of medical imaging using similar detection techniques is described. The different chapters of the book are written by world experts in their field. Clear instructions on the detection techniques and principles in terms of relevant operation parameters for scientists and graduate students are given.Detailed tables and diagrams will make this a very useful handbook for the application of these techniques in many different fields like physics, medicine, biology and other areas of natural science.
Download or read book OFDM for Optical Communications written by William Shieh and published by Academic Press. This book was released on 2009-09-18 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: - The first book on optical OFDM by the leading pioneers in the field - The only book to cover error correction codes for optical OFDM - Gives applications of OFDM to free-space communications, optical access networks, and metro and log haul transports show optical OFDM can be implemented - Contains introductions to signal processing for optical engineers and optical communication fundamentals for wireless engineers This book gives a coherent and comprehensive introduction to the fundamentals of OFDM signal processing, with a distinctive focus on its broad range of applications. It evaluates the architecture, design and performance of a number of OFDM variations, discusses coded OFDM, and gives a detailed study of error correction codes for access networks, 100 Gb/s Ethernet and future optical networks. The emerging applications of optical OFDM, including single-mode fiber transmission, multimode fiber transmission, free space optical systems, and optical access networks are examined, with particular attention paid to passive optical networks, radio-over-fiber, WiMAX and UWB communications. Written by two of the leading contributors to the field, this book will be a unique reference for optical communications engineers and scientists. Students, technical managers and telecom executives seeking to understand this new technology for future-generation optical networks will find the book invaluable. William Shieh is an associate professor and reader in the electrical and electronic engineering department, The University of Melbourne, Australia. He received his M.S. degree in electrical engineering and Ph.D. degree in physics both from University of Southern California. Ivan Djordjevic is an Assistant Professor of Electrical and Computer Engineering at the University of Arizona, Tucson, where he directs the Optical Communications Systems Laboratory (OCSL). His current research interests include optical networks, error control coding, constrained coding, coded modulation, turbo equalization, OFDM applications, and quantum error correction. "This wonderful book is the first one to address the rapidly emerging optical OFDM field. Written by two leading researchers in the field, the book is structured to comprehensively cover any optical OFDM aspect one could possibly think of, from the most fundamental to the most specialized. The book adopts a coherent line of presentation, while striking a thoughtful balance between the various topics, gradually developing the optical-physics and communication-theoretic concepts required for deep comprehension of the topic, eventually treating the multiple optical OFDM methods, variations and applications. In my view this book will remain relevant for many years to come, and will be increasingly accessed by graduate students, accomplished researchers as well as telecommunication engineers and managers keen to attain a perspective on the emerging role of OFDM in the evolution of photonic networks." -- Prof. Moshe Nazarathy, EE Dept., Technion, Israel Institute of Technology - The first book on optical OFDM by the leading pioneers in the field - The only book to cover error correction codes for optical OFDM - Applications of OFDM to free-space communications, optical access networks, and metro and log haul transports show optical OFDM can be implemented - An introduction to signal processing for optical communications - An introduction to optical communication fundamentals for the wireless engineer
Download or read book Space Telescopes and Instrumentation 2012 written by Mark C. Clampin and published by . This book was released on 2012 with total page 1856 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.
Download or read book Femtosecond Optical Frequency Comb Principle Operation and Applications written by Jun Ye and published by Springer Science & Business Media. This book was released on 2006-06-15 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last few years, there has been a convergence between the fields of ultrafast science, nonlinear optics, optical frequency metrology, and precision laser spectroscopy. These fields have been developing largely independently since the birth of the laser, reaching remarkable levels of performance. On the ultrafast frontier, pulses of only a few cycles long have been produced, while in optical spectroscopy, the precision and resolution have reached one part in Although these two achievements appear to be completely disconnected, advances in nonlinear optics provided the essential link between them. The resulting convergence has enabled unprecedented advances in the control of the electric field of the pulses produced by femtosecond mode-locked lasers. The corresponding spectrum consists of a comb of sharp spectral lines with well-defined frequencies. These new techniques and capabilities are generally known as “femtosecond comb technology. ” They have had dramatic impact on the diverse fields of precision measurement and extreme nonlinear optical physics. The historical background for these developments is provided in the Foreword by two of the pioneers of laser spectroscopy, John Hall and Theodor Hänsch. Indeed the developments described in this book were foreshadowed by Hänsch’s early work in the 1970s when he used picosecond pulses to demonstrate the connection between the time and frequency domains in laser spectroscopy. This work complemented the advances in precision laser stabilization developed by Hall.
Download or read book BTL Talks and Papers written by Bell Telephone Laboratories, inc. Technical Information Libraries and published by . This book was released on 1971 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Millimeter Wave Antennas Configurations and Applications written by Jaco du Preez and published by Springer. This book was released on 2016-06-20 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprehensively reviews the state of the art in millimeter-wave antennas, traces important recent developments and provides information on a wide range of antenna configurations and applications. While fundamental theoretical aspects are discussed whenever necessary, the book primarily focuses on design principles and concepts, manufacture, measurement techniques, and practical results. Each of the various antenna types scalable to millimeter-wave dimensions is considered individually, with coverage of leaky-wave and surface-wave antennas, printed antennas, integrated antennas, and reflector and lens systems. The final two chapters address the subject from a systems perspective, providing an overview of supporting circuitry and examining in detail diverse millimeter-wave applications, including high-speed wireless communications, radio astronomy, and radar. The vast amount of information now available on millimeter-wave systems can be daunting for researchers and designers entering the field. This book offers readers essential guidance, helping them to gain a thorough understanding based on the most recent research findings and serving as a sound basis for informed decision-making.
Download or read book Bell Laboratories Talks and Papers written by Bell Telephone Laboratories. Libraries and Information Systems Center and published by . This book was released on 1971 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
