覆盖泡沫粗糙海面的激光散射特性研究  

Study of Laser Scattering Characteristics of Rough Sea Surface with Foams

作　　者：亓晓[1] 韩香娥[1] 

机构地区：[1]西安电子科技大学物理与光电工程学院,陕西西安710071

出　　处：《光学学报》2015年第8期362-368,共7页Acta Optica Sinica

摘　　要：对潜通信及对潜探测中蓝绿激光将穿透海水表面,大气/海水界面由于风速及其他外力作用而呈现复杂状况,将影响蓝绿激光在界面的传输特性。针对泡沫-海面复合模型,采用矢量辐射传输理论、米氏理论以及粗糙面散射理论对泡沫海面的散射特性进行了分析。采用基尔霍夫近似针对JONSWAP海谱,讨论了泡沫海面在蓝绿激光波段的后向散射系数与入射角、风速、风区以及海水温度、含盐度等参量的关系。结果表明:随着海面上方风速、风区及介电常数的增大,泡沫层对海面的激光散射具有相当大的影响,尤其是在入射角度较大的状态下。The blue-green laser penetrates the sea surface in submarine communication and detection, and its propagation through atmospheric-sea characteristics is influenced by wind speed and other acting force. Based on the volume-surface composite model of rough sea surface with foam layer driven by wind,the rough surface scattering theory, Mie theory and vector radiative transfer （VRT） theory, the laser scattering characteristics of rough sea surface are analyzed. Using Kirchhoff approximation for the JONSWAP spectrum, the dependence of the backscattering coefficient of the sea surface on the incident angle,the wind speed, the wind area, as well as the temperature and salinity are discussed. The results suggest that foam layer has a considerable effect on the scattering characteristics especially at large incident angle, with the increasing wind speed, wind area and the dielectric constant.

关 键 词：散射 矢量辐射传输 米氏理论 粗糙海面 蓝绿激光 

分 类 号：O436[机械工程—光学工程]