Atmospheric and Ocean Optics

Analysis of beam wander effects for a horizontal-path propagating Gaussian-beam wave: focused beam case

[+] Author Affiliations
Jaume Recolons

Universitat Politècnica de Catalunya, Department of Signal Theory and Communications, C/Sor Eulàlia d’Anzizu S/N, 08034 Barcelona, Spain

Larry C. Andrews

University of Central Florida, Department of Mathematics and Florida Space Institute (FSI), Orlando, Florida 32816

Ronald L. Phillips

University of Central Florida, Department of Electrical and Computer Engineering and Florida Space Institute (FSI), Orlando, Florida 32816

Opt. Eng. 46(8), 086002 (August 24, 2007). doi:10.1117/1.2772263
History: Received October 05, 2006; Revised March 01, 2007; Accepted March 03, 2007; Published August 24, 2007
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Failure of the first-order Rytov approximation to properly predict the scintillation index of a large-aperture focused beam, or an uplink collimated (or focused) beam, has been discussed in several recent publications, which cite beam wander effects as the main reason for this failure. We use computer simulations to examine several aspects of beam wander phenomena on a propagating convergent beam in the weak-fluctuation regime over a horizontal path at high altitude for which the refractive index structure parameter is on the order of Cn2=1.39×1016m23. Simulation results are presented at various ranges up to 10km for (1) the beam wander centroid displacement, (2) the kurtosis excess of the irradiance profile, (3) the irradiance profile, (4) the mean-square hot spot displacement from the boresight and from the centroid, and (5) the scintillation index at the optical axis of the beam. In addition, simulation results are compared with theoretical models.

© 2007 Society of Photo-Optical Instrumentation Engineers

Citation

Jaume Recolons ; Larry C. Andrews and Ronald L. Phillips
"Analysis of beam wander effects for a horizontal-path propagating Gaussian-beam wave: focused beam case", Opt. Eng. 46(8), 086002 (August 24, 2007). ; http://dx.doi.org/10.1117/1.2772263


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