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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 7 — Apr. 1, 2014
  • pp: 2160–2163

Scintillations of higher-order laser beams in non-Kolmogorov medium

Yahya Baykal  »View Author Affiliations


Optics Letters, Vol. 39, Issue 7, pp. 2160-2163 (2014)
http://dx.doi.org/10.1364/OL.39.002160


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Abstract

In an atmospheric medium that shows a non-Kolmogorov turbulence behavior, the variation of the on-axis scintillation index is evaluated when higher-order laser modes are used as the excitation. The Rytov method is employed together with the equivalent structure constant, which makes our results valid in weak turbulence. In the limiting case, our solution correctly reduces to the known scintillation index of the Gaussian beam in Kolmogorov turbulence. For all the higher-order even modes, increase in the power law exponent, α of the non-Kolmogorov spectrum is found to increase the scintillations. When the source size of the higher-order modes is large, higher-order even modes attain almost the same scintillation index values for all α. However, for small source sizes, being valid for any realization of the non-Kolmogorov spectrum, the scintillations decrease as the mode order becomes large. The changes in the propagation distance, structure constant, and the wavelength do not vary these trends.

© 2014 Optical Society of America

OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(030.4070) Coherence and statistical optics : Modes
(290.5930) Scattering : Scintillation

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: February 5, 2014
Revised Manuscript: March 10, 2014
Manuscript Accepted: March 11, 2014
Published: March 31, 2014

Citation
Yahya Baykal, "Scintillations of higher-order laser beams in non-Kolmogorov medium," Opt. Lett. 39, 2160-2163 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-7-2160


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