Measurements of 0.63mm Laser-beam Scintillation in Strong Atmospheric Turbulence

Measurements of 0.63mm Laser-beam Scintillation in Strong Atmospheric Turbulence

Author: G. R. Ochs

Publisher:

Published: 1969

Total Pages: 28

ISBN-13:

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Log-amplitude variance and covariance of the scintillation of a diverging optical beam have been measured over a 48-hr period at a wavelength of 0.63[mu], on a 490 and 1000 m optical paths 2 m above the surface of a flat mesa near Boulder, Colorado. Simultaneous measurements of the refractive-index structure of the atmosphere have been obtained from temperature-structure-function measurements at spacings of 1, 3, and 10 cm. A saturation of scintillation occurs for values of log-amplitude variance between 0.5 and 1. After reaching a peak, the log-amplitude variance then decreases with both increasing range and increasing refractive-index turbulence. The spatial covariance of the fluctuations tends to increase in the saturation region. In the unsaturated region, the log-amplitude variance is approximately that predicted by the spherical-wave propagation theory of Tatarski.


Selected Papers on Laser Distance Measurements

Selected Papers on Laser Distance Measurements

Author: Thierry Bosch

Publisher: SPIE-International Society for Optical Engineering

Published: 1995

Total Pages: 750

ISBN-13:

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SPIE Milestones are collections of seminal papers from the world literature covering important discoveries and developments in optics and photonics.


Green Electronics

Green Electronics

Author: Cristian Ravariu

Publisher: BoD – Books on Demand

Published: 2018-06-20

Total Pages: 254

ISBN-13: 1789233046

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The Green Electronics book is intended to stimulate people's thinking toward the new concepts of an environment-friendly electronics - the main challenge in the future. The book offers multiple solutions to push the classical electronic industry toward green concepts, aided by nanotechnologies, with revolutionary features that provide low power consumption in electronics, use biomaterials for integrated structures, and include environmental monitoring tools. Based on organic semiconductors/insulators without toxic precursors, green electronic technologies launched promising devices like OLED, OTFT, or nano-core-shell transistors. The Green Electronics book successfully presents the recent directions collected worldwide and leaves free space for continuing year by year with new subtopics.


Laser Beam Scintillation with Applications

Laser Beam Scintillation with Applications

Author: Larry C. Andrews

Publisher: SPIE Press

Published: 2001

Total Pages: 408

ISBN-13: 9780819441034

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Renewed interest in laser communication systems has sparked development of useful new analytic models. This book discusses optical scintillation and its impact on system performance in free-space optical communication and laser radar applications, with a detailed look at propagation phenomena and the role of scintillation on system behavior. Intended for practicing engineers, scientists, and students.


Intelligent Communication, Control and Devices

Intelligent Communication, Control and Devices

Author: Sushabhan Choudhury

Publisher: Springer Nature

Published: 2019-08-28

Total Pages: 966

ISBN-13: 9811386188

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The book focuses on the integration of intelligent communication systems, control systems, and devices related to all aspects of engineering and sciences. It includes high-quality research papers from the 3rd international conference, ICICCD 2018, organized by the Department of Electronics, Instrumentation and Control Engineering at the University of Petroleum and Energy Studies, Dehradun on 21–22 December 2018. Covering a range of recent advances in intelligent communication, intelligent control and intelligent devices., the book presents original research and findings as well as researchers’ and industrial practitioners’ practical development experiences of.


Electronic Warfare and Radar Systems Engineering Handbook

Electronic Warfare and Radar Systems Engineering Handbook

Author:

Publisher:

Published: 1997-04-01

Total Pages: 605

ISBN-13: 9781423572381

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This handbook is designed to aid electronic warfare and radar systems engineers in making general estimations regarding capabilities of systems. It is not intended as a detailed designer's guide, due to space limitations. Portions of the handbook and future changes will be posted on an internet link.


Artificial Black Holes

Artificial Black Holes

Author: Mario Novello

Publisher: World Scientific

Published: 2002-10-04

Total Pages: 415

ISBN-13: 9814489603

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Physicists are pondering on the possibility of simulating black holes in the laboratory by means of various “analog models”. These analog models, typically based on condensed matter physics, can be used to help us understand general relativity (Einstein's gravity); conversely, abstract techniques developed in general relativity can sometimes be used to help us understand certain aspects of condensed matter physics. This book contains 13 chapters — written by experts in general relativity, particle physics, and condensed matter physics — that explore various aspects of this two-way traffic.


Optical Wireless Communications

Optical Wireless Communications

Author: Murat Uysal

Publisher: Springer

Published: 2016-08-25

Total Pages: 639

ISBN-13: 3319302019

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This book focuses on optical wireless communications (OWC), an emerging technology with huge potential for the provision of pervasive and reliable next-generation communications networks. It shows how the development of novel and efficient wireless technologies can contribute to a range of transmission links essential for the heterogeneous networks of the future to support various communications services and traffic patterns with ever-increasing demands for higher data-transfer rates. The book starts with a chapter reviewing the OWC field, which explains different sub-technologies (visible-light, ultraviolet (UV) and infrared (IR) communications) and introduces the spectrum of application areas (indoor, vehicular, terrestrial, underwater, intersatellite, deep space, etc.). This provides readers with the necessary background information to understand the specialist material in the main body of the book, which is in four parts. The first of these deals with propagation modelling and channel characterization of OWC channels at different spectral bands and with different applications. The second starts by providing a unified information-theoretic treatment of OWC and then discusses advanced physical-layer methodologies (including, but not limited to: advanced coding, modulation diversity, cooperation and multi-carrier techniques) and the ultimate limitations imposed by practical constraints. On top of the physical layer come the upper-layer protocols and cross-layer designs that are the subject of the third part of the book. The last part of the book features a chapter-by-chapter assessment of selected OWC applications. Optical Wireless Communications is a valuable reference guide for academic researchers and practitioners concerned with the future development of the world’s communication networks. It succinctly but comprehensively presents the latest advances in the field.


Particle Physics Reference Library

Particle Physics Reference Library

Author: Stephen Myers

Publisher: Springer Nature

Published: 2020-01-01

Total Pages: 867

ISBN-13: 303034245X

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This third open access volume of the handbook series deals with accelerator physics, design, technology and operations, as well as with beam optics, dynamics and diagnostics. A joint CERN-Springer initiative, the "Particle Physics Reference Library" provides revised and updated contributions based on previously published material in the well-known Landolt-Boernstein series on particle physics, accelerators and detectors (volumes 21A,B1,B2,C), which took stock of the field approximately one decade ago. Central to this new initiative is publication under full open access.