随机电磁-双曲正弦-高斯光束在大气湍流中横向偏振度的变化  

Change in the Transverse Degree of Polarization of Random Electromagnetic Sinh-Gaussian Beams Propagating in Atmospheric Turbulence

作　　者：赵柯莹 李晋红[1] 赖云忠[1] 

机构地区：[1]太原科技大学物理系,山西太原030024

出　　处：《激光与光电子学进展》2015年第9期45-50,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61405136;61178067);山西省青年科技研究基金(2012021016;2013021010-4)

摘　　要：以随机电磁-双曲正弦-高斯(Sh G)光束作为典型的随机电磁光束,根据广义惠更斯-菲涅耳原理推导出随机电磁Sh G光束在大气湍流中的交叉谱密度矩阵元的解析表达式,用以研究随机电磁Sh G光束在大气湍流中的横向偏振度的变化。研究结果表明,随机电磁Sh G光束在大气湍流中传输时,横向偏振度的分布随位置的不同而不同,结构常数C2n越小,或Sh部分参数Ω0越大,或互相关空间相关长度σxy(σyx)越大,横向偏振度的分布变为双峰状、平顶状、单峰状的传输距离越长。Based on the extend Huygens-Fresnel principle, the analytical expressions for cross-spectral density matrix elements of random electromagnetic Sinh-Gaussian （ShG） beams as typical stochastic electromagnetic beams propagating through atmospheric turbulence are derived, and used to study change in the transverse degree of polarization of random electromagnetic ShG beams propagating in atmospheric turbulence. It is shown that distribution of transverse degree of polarization varies with location when random electromagnetic ShG is propagating in atmospheric turbulence. The smaller the structure constant C~, the larger the Sh-part parameter Ω0, or the bigger the spatial correlation length σxy（σyx）, the longer the propagation distance of distribution of polarization into bimodal shape, fiat shape, unimodal shape.

关 键 词：大气光学 横向偏振度 相干偏振性统一理论 随机电磁双曲正弦-高斯光束 

分 类 号：O436[机械工程—光学工程]