Ms. Xiao Qi Profile

Xiao Qi

at Xidian Univ

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Proceedings Article | 15 October 2015 Paper

Study of the blue-green laser scattering from the rough sea surface with foams by the improved two-scale method

Xiangzhen Li, Xiao Qi, Xiang'e Han

Proceedings Volume 9673, 96730H (2015) https://doi.org/10.1117/12.2197824

KEYWORDS: Foam, Laser scattering, Scattering, Backscatter, Microwave radiation, Mie scattering, Particles, Dielectrics, Laser communications, Submerged target modeling

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The characteristics of laser scattering from sea surface have a great influence on application performance, from submarine communication, laser detection to laser diffusion communication. Foams will appear when the wind speed exceeds a certain value, so the foam can be seen everywhere in the upper layer of the ocean. Aiming at the volume-surface composite model of rough sea surface with foam layer driven by wind, and the similarities and differences of scattering characteristics between blue-green laser and microwave, an improved two-scale method for blue-green laser to calculate the scattering coefficient is presented in this paper. Based on the improved two-scale rough surface scattering theory, MIE theory and VRT( vector radiative transfer ) theory, the relations between the foam coverage of the sea surface and wind speed and air-sea temperature difference are analyzed. Aiming at the Gauss sea surface in blue-green laser, the dependence of back- and bistatie-scattering coefficient on the incident and azimuth angle, the coverage of foams, as well as the wind speed are discussed in detail. The results of numerical simulations are compared and analyzed in this paper. It can be concluded that the foam layer has a considerable effect on the laser scattering with the increase of wind speed, especially for a large incident angle. Theoretical analysis and numerical simulations show that the improved two-scale method is reasonable and efficient.

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