Behavior of the laser beam wandering with the turbulent path length

Gustave Funes, Damián Gulich, Luciano Zunino, Dario G. Pérez, Mario Garavaglia

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We experimentally study the variance of the transverse displacement (wandering) of a laser beam after it has traveled through indoor artificially convective turbulence. In a previous paper (Opt. Comm., Vol. 242, No 1-3, pp. 76-63, November 2004) we have modeled the atmospheric turbulent refractive index as a fractional Brownian motion. As a consequence, a different behavior is expected for the wandering variance. It behaves as L2+2H, where L is the propagation length and H the Hurst exponent associated to the fractional Brownian motion. The traditional cubic dependence is recovered when H = 1/2 - the ordinary Brownian motion. That is the case of strong turbulence or long propagation path length. Otherwise, for weak turbulence and short propagation path length some deviations from the usual expression should be found. In this presentation we experimentally confirm the previous assertion.

Original languageEnglish
Title of host publicationThirteenth Joint International Symposium on Atmospheric and Ocean Optics/ Atmospheric Physics
DOIs
StatePublished - 2006
Externally publishedYes
EventThirteenth Joint International Symposium on Atmospheric and Ocean Optics/ Atmospheric Physics - Tomsk, Russian Federation
Duration: 2 Jul 20067 Jul 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6522
ISSN (Print)0277-786X

Conference

ConferenceThirteenth Joint International Symposium on Atmospheric and Ocean Optics/ Atmospheric Physics
Country/TerritoryRussian Federation
CityTomsk
Period2/07/067/07/06

Keywords

  • Fractional brownian motion
  • Hurst exponent
  • Indoor convective turbulence
  • Laser beam wandering variance

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