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Title: Intuitive model for the scintillations of a partially coherent beam

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.
Authors:
 [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-14-27703
Journal ID: ISSN 1094-4087; OPEXFF
Grant/Contract Number:
AC52-06NA25396
Type:
Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 22; Journal Issue: 26; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING
OSTI Identifier:
1222308
Alternate Identifier(s):
OSTI ID: 1235665