摘要
基于Rytov近似理论,分析了各向异性海洋湍流中汉克-贝塞尔(HB)光束的交叉谱密度,研究了轨道角动量(OAM)模式探测概率、串扰概率及HB光束的螺旋相位谱,建立了各向异性海洋湍流中OAM模式探测概率模型。结果表明,HB光束在各向异性海洋湍流环境中发射OAM模式的探测概率高于在各向同性海洋湍流环境中的探测概率。并且随着各向异性因子的增大,海洋湍流对发射OAM模式探测概率的影响减小,串扰模式的探测概率也随之下降。
Based on the Rytov approximation theory,we analyze the cross-spectral density of Hankel-Bessel(HB)beams in anisotropic ocean turbulence.In this paper,we study the orbital angular momentum(OAM)mode detection probability,the crosstalk probability and the spiral phase spectrum of the HB beam,and establish the OAM mode detection probability model in anisotropic ocean turbulence.The results show that the detection probability of the emission mode is decreased and the spiral phase spectrum is expanded due to the ocean turbulence.Furthermore,with the increase of anisotropy factor,the influence of ocean turbulence on the detection probability of HB beam becomes smaller.Meanwhile,with the increase of the temperature variance dissipation rate and the equilibrium parameter,and the decrease of the dynamic energy dissipation rate,the influence of ocean turbulence on the orbital angular momentum transmission is increased.
作者
贺锋涛
房伟
张建磊
杨祎
杜迎
张斌
He Fengtao;Fang Wei;Zhang Jianlei;Yang Yi;Du Ying;Zhang Bin(School of Electronic Engineering,Xi′an University of Posts and Telecommunications,Xi′an,Shaanxi 710121,China;Key Laboratory of Underwater Information and Control,China Shipbuilding Industry Corporation 705 Research Institute,Xi′an,Shaanxi 710077,China)
出处
《光电工程》
CAS
CSCD
北大核心
2020年第6期76-82,共7页
Opto-Electronic Engineering
基金
国家自然科学基金资助项目(61805199)
国防科技创新特区项目(18-H 863-01-ZT-001-004-02)
陕西省自然科学基金资助项目(2018JQ6065)
水下信息与控制国家重点实验室项目资助的课题(XK-01-61-KS-0176)。
关键词
各向异性海洋湍流
汉克-贝塞尔光束
轨道角动量
螺旋相位谱
光学涡旋
anisotropic ocean turbulence
Hank-Bessel beam
orbital angular momentum
orbital angular momentum spectrum
optical vortex
