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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 3 — Feb. 4, 2008
  • pp: 2206–2220

Temporal analysis of laser beam propagation in the atmosphere using computer-generated long phase screens

Federico Dios, Jaume Recolons, Alejandro Rodríguez, and Oscar Batet  »View Author Affiliations

Optics Express, Vol. 16, Issue 3, pp. 2206-2220 (2008)

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Temporal analysis of the irradiance at the detector plane is intended as the first step in the study of the mean fade time in a free optical communication system. In the present work this analysis has been performed for a Gaussian laser beam propagating in the atmospheric turbulence by means of computer simulation. To this end, we have adapted a previously known numerical method to the generation of long phase screens. The screens are displaced in a transverse direction as the wave is propagated, in order to simulate the wind effect. The amplitude of the temporal covariance and its power spectrum have been obtained at the optical axis, at the beam centroid and at a certain distance from these two points. Results have been worked out for weak, moderate and strong turbulence regimes and when possible they have been compared with theoretical models. These results show a significant contribution of beam wander to the temporal behaviour of the irradiance, even in the case of weak turbulence. We have also found that the spectral bandwidth of the covariance is hardly dependent on the Rytov variance.

© 2008 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

Original Manuscript: October 4, 2007
Revised Manuscript: December 17, 2007
Manuscript Accepted: December 19, 2007
Published: February 1, 2008

Federico Dios, Jaume Recolons, Alejandro Rodríguez, and Oscar Batet, "Temporal analysis of laser beam propagation in the atmosphere using computer-generated long phase screens," Opt. Express 16, 2206-2220 (2008)

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