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Proceedings Paper

Irradiance scintillation on laser beam propagation in the boundary-layer turbulent atmosphere
Author(s): Xiwen Qiang; Haomiao Ma
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Paper Abstract

Optical turbulence effects, such as irradiance scintillation, fluctuation of arrival angle, beam wander, and beam spreading, etc., degrade the beam quality as a laser beam propagates in the turbulent atmosphere. Of these effects, the scintillation is a dominant effect in many applied fields such as high-data-rate laser atmospheric communication, astronomical adaptive optics imaging, and other laser engineering. The scintillated irradiance depends on integral of optical turbulence along the propagation path and it induces a perturbation on the amplitude of the electro-magnetic field. As the integral is smaller, the Rytov weak fluctuation theory can solve the problem successfully. However, with an increase in the strength of the atmosphere turbulence or the path length, multiple scattering events must occur and result in saturation. The irradiance scintillation of laser beam propagation in a slant-path in the boundary-layer is investigated for the cases of weaker to moderate-to-stronger turbulence, various path-length and elevation angles. The dependence of scintillation on turbulence strength, path-length, and elevation angle is presented and the results are compared with the Rytov theory.

Paper Details

Date Published: 6 February 2008
PDF: 7 pages
Proc. SPIE 6823, High-Power Lasers and Applications IV, 68231G (6 February 2008); doi: 10.1117/12.768069
Show Author Affiliations
Xiwen Qiang, Xi'an Jiaotong Univ. (China)
Northwest Institute of Nuclear Technology (China)
Haomiao Ma, Shaanxi Normal Univ. (China)

Published in SPIE Proceedings Vol. 6823:
High-Power Lasers and Applications IV
Dianyuan Fan; Robert F. Walter, Editor(s)

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