部分偏振平顶高斯光束在海洋湍流中的偏振变化  

On the Changes in Polarization of Partially Polarized Flat-topped Beam Propagating in Oceanic Turbulence

作　　者：张汉谋[1] 

机构地区：[1]陇东学院电气工程学院,甘肃庆阳745000

出　　处：《陇东学院学报》2015年第5期22-27,共6页Journal of Longdong University

摘　　要：基于光束相干偏振统一理论研究了部分偏振矢量平顶高斯光束在海洋湍流传播时偏振特性的变化,给出了该光束在海洋湍流中传播时交叉谱密度矩阵元的表达式,数值模拟了光束在海洋湍流中传播时光强分布以及偏振特性的变化情况。结果表明:该光束在海洋湍流中传播时偏振度幅值振荡变化,而在远场区偏振度、方位角和椭偏率具有重构现象。Changes in polarization properties of partially polarized fiat-topped Gaussian beam propagating in oceanic turbulence are studied with the unified theories of coherence and polarization. The formulas for the elements of the cross-spectral density matrix are obtained by analytical methods. Polarization proper- ties such as the degree of polarization, the orientation angle, and the degree of ellipticity for the flat-topped beam have been studied by numerical simulation. The results show that the degree of polarization fluctu- ates when the fiat-topped beam propagates in the oceanic turbulence, and they have obvious reconstruction phenomenon in the far-field zone.

关 键 词：平顶高斯光束 海洋湍流 偏振特性 自构现象 

分 类 号：O436.3[机械工程—光学工程]