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GENERAL INFORMATION
chapter 4, Theory of Scintillation: Spherical Wave Model
Published: 20 July 2001
Chapter DOI: http://dx.doi.org/10.1117/3.412858.ch4
Chapter Page Count: 22
pages
Table of Contents
- Part I Scintillation Models
- 1. Optical Wave Propagation in Random Media: Background Review
- Part II Applications
- 7. Laser Communication Systems
Chapter Contents
- 4.1 Introduction
- 4.2 Zero Inner Scale Model
- 4.2.1 Effective Kolmogorov Spectrum
- 4.3 Nonzero Inner Scale Model
- 4.3.1 Effective Atmospheric Spectrum
- 4.3.2 Outer-Scale Effects
- 4.3.3 Comparison with Experimental Data
- 4.4 Covariance Function of Irradiance
- 4.5 Gamma-Gamma Distribution
- 4.5.1 Comparison with Simulation Data
- References
Excerpt
4.1 Introduction
The general plane wave model discussed in early investigations is often used in describing properties of starlight and other exo-atmospheric sources at a ground-based receiver. In addition to the plane wave model, some early investigations included a spherical wave model or, equivalently, a point source. At distance L from the transmitter source, the spherical wave model under a paraxial approximation is mathematically described by
In this chapter we present a treatment of spherical wave propagation through optical turbulence parallel to that in Chapter 3 for a plane wave. Under weak fluctuation theory, the log-irradiance variance is defined by
©2001 Society of Photo-Optical Instrumentation Engineers
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