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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 31, Iss. 1 — Jan. 1, 2014
  • pp: 172–182

Propagation characteristics of decentered annular beams through non-Kolmogorov turbulence

Xiaoqing Li and Xiaoling Ji  »View Author Affiliations


JOSA A, Vol. 31, Issue 1, pp. 172-182 (2014)
http://dx.doi.org/10.1364/JOSAA.31.000172


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Abstract

This paper studies the propagation characteristics related to higher-order moments of decentered annular beams through non-Kolmogorov turbulence. The analytical expressions for the mean-squared beam width w, the skewness parameter A, and the kurtosis parameter K are derived. The analytical expression for the non-Kolmogorov turbulence parameter T is also derived, and the differences between two non-Kolmogorov turbulence parameters T and T are examined. It is shown that K depends on both T and T, but w and A only depend on T. K decreases monotonically as the spectral power law exponent α increases, but there exist a maximum of w and a minimum of A when α=3.112. When propagation distance z is long enough, A reaches zero, i.e., the intensity distribution is perfectly symmetric about the centroid position axis. In free space, both A>0 and A<0 may appear on propagation. However, it is always A>0 or A<0 on propagation when turbulence is not weak. On the other hand, in turbulence, the maximum of K increases as the decentered parameter increases and the obscure ratio decreases. In particular, when z is long enough, the beam spot is elliptical in free space, but it becomes circular in turbulence.

© 2013 Optical Society of America

OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: September 12, 2013
Revised Manuscript: November 25, 2013
Manuscript Accepted: November 25, 2013
Published: December 19, 2013

Citation
Xiaoqing Li and Xiaoling Ji, "Propagation characteristics of decentered annular beams through non-Kolmogorov turbulence," J. Opt. Soc. Am. A 31, 172-182 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-1-172


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