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

Ruizhong Rao; Zhiben Gong

doi:10.1117/12.481688

5 September 2002 High-frequency behavior of the temporal spectrum of laser beam propagating through turbulence

Ruizhong Rao, Zhiben Gong

Proceedings Volume 4926, Adaptive Optics and Applications II; (2002) https://doi.org/10.1117/12.481688
Event: Photonics Asia, 2002, Shanghai, China

Abstract

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 ? that is proportional to the square ofthe ratio ofthe Fresnel size and the beam radius on the receiver. A plane or spherical wave assumption can be made only for a beam with very small A, and the HFS presents a —8/3 power-law dependence. For a beam with moderately small ?, the HFS presents a —8/3 and a —14/3 power-law dependence in two regions. For a beam with ? being about or greater than unity the HFS presents a unique —14/3 power-law dependence. The results are verified by experimental data.

Citation Download Citation

Ruizhong Rao and Zhiben Gong "High-frequency behavior of the temporal spectrum of laser beam propagating through turbulence", Proc. SPIE 4926, Adaptive Optics and Applications II, (5 September 2002); https://doi.org/10.1117/12.481688

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