High-frequency behavior of the temporal spectrum of laser beam propagating through turbulence

Details High-frequency behavior of the temporal spectrum of laser beam propagating through turbulence High-frequency behavior of the temporal spectrum of laser beam propagating through turbulence

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4926..175r&link_type=abstract

Proc. SPIE Vol. 4926, p. 175-180, Adaptive Optics and Applications II, Wenhan Jiang; Robert K. Tyson; Eds.

Physics

Optics

Scientific paper

The temporal spectra of the intensity fluctuations of Gaussian beam waves propagating through a Kolmogrov turbulence are analyzed numerically. It is found that high- frequency spectra (HFS) are mainly determined by a parameter (Lambda) that is proportional to the square of the ratio of the Fresnel size and the beam radius on the receiver. A plane or spherical wave assumption can be made only for a beam with a very small (Lambda) , the HFS presents a -8/3 and a -14/3 power-law dependence in two regions. For a beam with (Lambda) being about or greater than unity the HFS presents a unique -14/3 power-law dependence. The results are verified by experimental data.

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