Laser Beam Propagation through Random Media, Second Edition by Larry C. Andrews

By Larry C. Andrews

Considering book of the 1st version of this article in 1998, there were numerous new, very important advancements within the concept of beam wave propagation via a random medium, that have been integrated into this moment variation. additionally new to this variation are types for the scintillation index below moderate-to-strong irradiance fluctuations; versions for aperture averaging in line with ABCD ray matrices; beam wander and its results on scintillation; conception of partial coherence of the resource; types of tough goals for ladar purposes; section fluctuations; research of alternative beam shapes; plus multiplied research of free-space optical communique platforms and imaging systems.

Contents

- Preface to moment variation

- Preface to First version

- Symbols and Notation

- uncomplicated concept

- purposes

- similar issues

- Appendix I: exact capabilities

- Appendix II: fundamental desk

- Appendix III: Tables of Beam data

- Index

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References 1. L. A. Chernov, Wave Propagation in a Random Medium (McGraw-Hill, New York, 1960), trans. by R. A. Silverman. 2. (a) V. I. Tatarskii, Wave Propagation in a Turbulent Medium (McGraw-Hill, New York, 1961), trans. by R. A. Silverman. (b) V. I. Tatarskii, The Effects of the Turbulent Atmosphere on Wave Propagation (trans. S. Dept. of Commerce, Springfield, 1971). 3. R. S. Lawrence and J. W. Strohbehn, “A survey of clear-air propagation effects relevant to optical communications,” Proc.

9. A coherent detector has the following characteristics: . . detects both the amplitude and phase involves the addition of the LO signal with the incoming signal before photodetection the mixing process is to convert a weak signal to IF in the RF region for improved detection and processing Also, the modulation format of a coherent detector can include: . . amplitude modulation frequency modulation phase modulation polarization modulation In coherent detection the noise sources are similar to those for direct detection, but the primary noise source is local oscillator (LO) shot noise, which generally dominates all other noise sources.

Temperature here generally decreases at a constant rate down to 2908C, which is the coldest temperature in the atmosphere. The mesopause is the third isothermal layer, separating the mesosphere and the thermosphere. The regions of the stratosphere and the mesosphere, along with the stratopause and mesopause, constitute what is commonly called the middle atmosphere. Thermosphere—extends from the mesopause to roughly 600 km. Air temperature in the thermosphere increases quite strongly above 90 km due to the Sun’s energy.

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