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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: Stephen A. Burns
  • Vol. 26, Iss. 2 — Feb. 1, 2009
  • pp: 236–243

Directionality of Gaussian array beams propagating in atmospheric turbulence

Xiaoling Ji and Xiaoqing Li  »View Author Affiliations


JOSA A, Vol. 26, Issue 2, pp. 236-243 (2009)
http://dx.doi.org/10.1364/JOSAA.26.000236


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Abstract

The angular spread is chosen as the characteristic parameter of beam directionality, and the directionality of Gaussian array beams propagating in atmospheric turbulence is studied. The consistency of the directionality of Gaussian array beams expressed in terms of the angular spread and the normalized far-field average intensity distribution is also examined. Closed-form expressions for the mean-squared beam width and angular spread of Gaussian array beams propagating in atmospheric turbulence are derived. It is found that for the case of coherent combination, under a certain condition array beams exist that may have the same directionality (i.e., the same angular spread) as a fully coherent Gaussian laser beam in free space and also in turbulence. However, the directionality of Gaussian array beams in terms of the angular spread is not consistent with that in terms of the normalized far-field average intensity distribution in free space, whereas they may be consistent as a result of turbulence.

© 2009 Optical Society of America

OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(030.7060) Coherence and statistical optics : Turbulence

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: July 21, 2008
Revised Manuscript: October 30, 2008
Manuscript Accepted: October 31, 2008
Published: January 8, 2009

Citation
Xiaoling Ji and Xiaoqing Li, "Directionality of Gaussian array beams propagating in atmospheric turbulence," J. Opt. Soc. Am. A 26, 236-243 (2009)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-26-2-236

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