Intuitive model for the scintillations of a partially coherent beam
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
We developed an intuitive model for the scintillation index of a partially coherent beam in which essentially the only critical parameter is the properly defined Fresnel number equal to the ratio of the “working” aperture area to the area of the Fresnel zone. The model transpired from and is supported by numerical simulations using Rytov method for weak fluctuations regime and Tatarskii turbulence spectrum with inner scale. The ratio of the scintillation index of a partially coherent beam to that of a plane wave displays a characteristic minimum, the magnitude of which and its distance from the transmitter are easily explained using the intuitive model. Furthermore, a theoretical asymptotic is found for the scintillation index of a source with decreasing coherence at this minimum.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1235665
- Report Number(s):
- LA-UR-14-27703; OPEXFF
- Journal Information:
- Optics Express, Vol. 22, Issue 26; ISSN 1094-4087
- Publisher:
- Optical Society of America (OSA)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Partially coherent beam propagation in atmospheric turbulence [Invited]
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journal | January 2014 |
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conference | April 1997 |
The scintillations for weak atmospheric turbulence using a partially coherent source
|
journal | July 1983 |
Numerical methods for the computation of the confluent and Gauss hypergeometric functions
|
journal | August 2016 |
Effects of residual coherence on the scintillation of a partially coherent beam
|
journal | January 2019 |
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