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Optical Engineering • Open Access

Beam wander analysis for focused partially coherent beams propagating in turbulence

Paper Abstract

We extend the theory of beam wander for propagation through atmospheric turbulence to the case of a focused partially coherent beam (PCB). In addition to investigating the beam wander expression, we restate expressions for the beam size, long- and short-time average beam intensity profile, and the on-axis scintillation index of tracked and untracked beams. A wave optics simulation is implemented and the numerical results are compared with corresponding analytic results. The cases examined involve turbulence strengths ranging from Cn2 = 10−16 to 10−14  m−2/3 and for various horizontal paths ranging from 1 to 10 km. Although the extended analytic theory stems from a study of coherent beams, the simulation results show good agreement with the analytical results for PCBs in fluctuation regimes ranging from weak to intermediate.

Paper Details

Date Published: 1 March 2012
PDF: 9 pages
Opt. Eng. 51(2) 026001 doi: 10.1117/1.OE.51.2.026001
Published in: Optical Engineering Volume 51, Issue 2
Show Author Affiliations
Xifeng Xiao, New Mexico State Univ. (United States)
David G. Voelz, New Mexico State Univ. (United States)

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