Intermittency of laser scintillation over sea

Wenyue Zhu; Honghua Huang; Ruizhong Rao

doi:10.1117/12.627323

13 October 2005 Intermittency of laser scintillation over sea

Wenyue Zhu, Honghua Huang, Ruizhong Rao

Proceedings Volume 5981, Optics in Atmospheric Propagation and Adaptive Systems VIII; 598106 (2005) https://doi.org/10.1117/12.627323
Event: SPIE Remote Sensing, 2005, Bruges, Belgium

Abstract

The intermittency in optical scintillation was theoretically studied and experimentally observed by laser propagation through the turbulent atmosphere over sea surface. It is found that the intermittent characteristics of the atmospheric turbulence repeat itself in optical irradiance fluctuations, then a method of the singularity measurement analysis was introduced and the intermittency index was presented to quantitatively evaluate the intermittency strength. Experiment results show that the intermittency index in laser scintillation is around 0.1 and varies a little compared with the significant variation of the turbulence strength, which had been approximately estimated at two orders of magnitude in a whole day. The dependence of the intermittency on the wavelength was further studied and the relationship was obtained using a multi-wavelength scintillometer. Generally, the intermittency indices display some differences at the different optical wavelengths, especially in strong turbulence. However, the wavelength dependence is not so notable that the intermittency indices are assumed to be equal within less than 10%, even the maximum error is no more than 20%. Moreover, some statistical results of the intermittency strength are also obtained from a long-term plan of laser propagating in coastal surroundings.

Citation Download Citation

Wenyue Zhu, Honghua Huang, and Ruizhong Rao "Intermittency of laser scintillation over sea", Proc. SPIE 5981, Optics in Atmospheric Propagation and Adaptive Systems VIII, 598106 (13 October 2005); https://doi.org/10.1117/12.627323

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