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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. 29, Iss. 2 — Feb. 1, 2012
  • pp: 169–173

Intensity fluctuations of flat-topped beam in non-Kolmogorov weak turbulence

Hamza Gerçekcioğlu and Yahya Baykal  »View Author Affiliations


JOSA A, Vol. 29, Issue 2, pp. 169-173 (2012)
http://dx.doi.org/10.1364/JOSAA.29.000169


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Abstract

Results obtained on the intensity fluctuations of flat-topped Gaussian beams in weakly turbulent non-Kolmogorov horizontal atmospheric optics links are represented. Effects on the scintillation index of the power law α that describes the non-Kolmogorov spectrum are examined. Our results correctly reduce to the existing intensity fluctuations of flat-topped beams in Kolmogorov turbulence. Variation of the scintillation index against non-Kolmogorov power law α exhibits a peak at the worst power law αw, which happens to be smaller than the Kolmogorov power law of 11/3. If the power law is smaller (larger) than αw, increase in α will increase (decrease) the intensity fluctuations. Evaluation of the scintillation index at the worst power law results in smaller fluctuations for a Gaussian beam at short propagation distances; however, at long propagation distances flatter beams happen to possess smaller fluctuations. The scintillation change versus the source size follows a similar trend regardless whether the flat-topped beam propagates in a Kolmogorov or non-Kolmogorov medium.

© 2012 Optical Society of America

OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(010.3310) Atmospheric and oceanic optics : Laser beam transmission
(290.5930) Scattering : Scintillation

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: July 26, 2011
Revised Manuscript: November 1, 2011
Manuscript Accepted: November 11, 2011
Published: January 10, 2012

Citation
Hamza Gerçekcioğlu and Yahya Baykal, "Intensity fluctuations of flat-topped beam in non-Kolmogorov weak turbulence," J. Opt. Soc. Am. A 29, 169-173 (2012)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-29-2-169

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