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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 22 — Aug. 1, 2007
  • pp: 5044–5050

Scintillations of incoherent flat-topped Gaussian source field in turbulence

Yahya Baykal and Halil T. Eyyuboǧlu  »View Author Affiliations

Applied Optics, Vol. 46, Issue 22, pp. 5044-5050 (2007)

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The intensity fluctuations of incoherent flat-topped Gaussian beams are evaluated when such sources are used in weakly turbulent horizontal atmospheric links. The formulation is developed for a detector having a response time much longer than the source coherence time. The flat-topped Gaussian profile is obtained by superposing many Gaussian beams, then the incoherence is introduced through delta correlation in space. The scintillation index of the incoherent flat-topped Gaussian beams is found to be smaller than the scintillation index of the corresponding incoherent Gaussian beams at the same link length, source size, and wavelength. When compared with the coherent counterparts, the intensity fluctuations of the incoherent flat-topped Gaussian beams are much smaller, yielding the same value only at the spherical wave limit, as expected. Transmitter aperture averaging is a special case of our solution.

© 2007 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
(290.5930) Scattering : Scintillation

ToC Category:

Original Manuscript: January 26, 2007
Revised Manuscript: April 19, 2007
Manuscript Accepted: April 28, 2007
Published: July 6, 2007

Yahya Baykal and Halil T. Eyyuboǧlu, "Scintillations of incoherent flat-topped Gaussian source field in turbulence," Appl. Opt. 46, 5044-5050 (2007)

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