径向偏振部分相干扭曲光束在各向异性大气湍流中的传输特性  

Propagation Characteristics of Radially Polarized Partially Coherent Twisted Beam in Anisotropic Atmospheric Turbulence

作　　者：杨宁 赵亮 许颖 杨盛凯 徐勇根 Yang Ning;Zhao Liang;Xu Ying;Yang Shengkai;Xu Yonggen(School of Science,Xihua University,Chengdu,Sichuan 610039,China)

机构地区：[1]西华大学理学院,四川成都610039

出　　处：《激光与光电子学进展》2021年第21期25-32,共8页Laser & Optoelectronics Progress

基　　金：四川省科技厅基金(2019YJ0470)。

摘　　要：本文推导径向偏振部分相干扭曲光束(RPPCTB)在各向异性大气湍流中传输因子和空间扩展的解析表达式,主要分析扭曲因子等光束参数及各向异性因子等大气湍流参数对光束传输特性的影响,通过相应的数值模拟计算分析初始相干长度、束腰宽度、波长、扭曲因子、各向异性因子、湍流内尺度、湍流外尺度和广义指数参数对光束传输质量的影响。仿真结果表明,通过减小光束的初始相干长度,增加束腰宽度和波长,可以提高光束的传输质量,而增大光束的扭曲因子,光束有更小的传输因子,这表明通过合理地调控光束的扭曲相位,可以有效提高光束的抗湍流能力。This study derives the analytical expressions for the propagation factor and spatial expansion of radially polarized partially coherent twisted beams(RPPCTBs)in anisotropic atmospheric turbulence,with a focus on the effects of beam parameters,such as twisting factors and atmospheric turbulence parameters including anisotropic factors,on beam propagation characteristics.Using numerical simulation calculations,the effects of the initial coherence length,beam waist width,wavelength,twist factor,anisotropy factor,turbulence inner scale,turbulence outer scale,and generalized exponential parameters on the beam transmission quality are analyzed.Simulation results show that by decreasing the initial coherence length of the beam and increasing the beam waist width and wavelength,the transmission quality of the beam can be improved.Moreover,the twisting factor of the beam is increased and the beam shows a small transmission factor,demonstrating that the beam can be adjusted reasonably and the twisting phase can effectively improve the antiturbulence ability of the beam.

关 键 词：相干光学 径向偏振部分相干扭曲光束 扭曲因子 传输因子 各向异性大气湍流 

分 类 号：O436[机械工程—光学工程]