The Effects of Atmospheric Turbulence on an Air-To-Air Optical Communication Link
The Effects of Atmospheric Turbulence on an Air-To-Air Optical Communication Link

Author: J. N. Kanavos

Publisher:

Published: 1984

Total Pages: 109

ISBN-13:

DOWNLOAD EBOOK

This thesis presents an analysis of the performance of an air-to-air optical communication link in the presence of atmospheric turbulence. As aircraft travel through the atmosphere, they encounter regions of atmospheric turbulence. While harmless to radio frequency communications, these regions of turbulence can cause both intensity and phase fluctuations within an optical beam. as a result, the communication link bit error rate rises. To evaluate the performance of such a link, a computer simulation was developed. By varying such parameters as the speed fo the aircraft, its altitude, and propagation path length, a determination could be made about link performance. The results obtained from the simulation showed that atmospheric turbulence plays a significant role in determining link performance. Originator-Supplied keywords include: Optical Communications, Laser Communications, and Turbulence.

Free Space Optical Communication
Free Space Optical Communication

Author: Hemani Kaushal

Publisher: Springer

Published: 2017-01-06

Total Pages: 233

ISBN-13: 8132236912

DOWNLOAD EBOOK

This book provides an in-depth understanding of free space optical (FSO) communication with a particular emphasis on optical beam propagation through atmospheric turbulence. The book is structured in such a way that it provides a basic framework for the beginners and also gives a concise description from a designer’s perspective. The book provides an exposure to FSO technology, fundamental limitations, design methodologies, system trade-offs, acquisition, tracking and pointing (ATP) techniques and link-feasibility analysis. The contents of this book will be of interest to professionals and researchers alike. The book may also be used as a textbook for engineering coursework and professional training.

Mean and Variance of the Irradiance for a Phase-compensated Optical Link in Turbulence
Mean and Variance of the Irradiance for a Phase-compensated Optical Link in Turbulence

Author: Ronald Louis Fante

Publisher:

Published: 1975

Total Pages: 32

ISBN-13:

DOWNLOAD EBOOK

In the last several years considerable progress has been made toward the development of adaptive systems which can compensate for the deleterious effect of atmospheric turbulence on air/air and air/ground optical communications links. One promising method is reciprocity tracking in which a beacon located on the receiver is used in real time to adjust the wavefront of the transmitter. A beacon signal is emitted at x and the phase distribution of this signal is sensed in the plane x = 0. The phase of the transmitter field is then continuously adjusted so that it is the negative of the received beacon phase distribution. because of atmospheric reciprocity, this then continuously compensates for the phase fluctuations induced on the transmitted field by the turbulent medium between the transmitter and receiver.

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

DOWNLOAD EBOOK

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.

Astronomical Optics
Astronomical Optics

Author: Daniel J. Schroeder

Publisher: Elsevier

Published: 2012-12-02

Total Pages: 367

ISBN-13: 032313856X

DOWNLOAD EBOOK

Written by a recognized expert in the field, this clearly presented, well-illustrated book provides both advanced level students and professionals with an authoritative, thorough presentation of the characteristics, including advantages and limitations, of telescopes and spectrographic instruments used by astronomers of today. Written by a recognized expert in the field Provides both advanced level students and professionals with an authoritative, thorough presentation of the characteristics, including advantages and limitations, of telescopes and spectrographic instruments used by astronomers of today

Laser Beam Propagation Through Random Media
Laser Beam Propagation Through Random Media

Author: Larry C. Andrews

Publisher: SPIE-International Society for Optical Engineering

Published: 2005

Total Pages: 820

ISBN-13:

DOWNLOAD EBOOK

Since publication of the first edition of this text in 1998, there have been several new, important developments in the theory of beam wave propagation through a random medium, which have been incorporated into this second edition. Also new to this edition are models for the scintillation index under moderate-to-strong irradiance fluctuations; models for aperture averaging based on ABCD ray matrices; beam wander and its effects on scintillation; theory of partial coherence of the source; models of rough targets for ladar applications; phase fluctuations; analysis of other beam shapes; plus expanded analysis of free-space optical communication systems and imaging systems.