螺旋因斯-高斯光束海洋湍流信道传输与通信特性仿真研究  

Simulation Study on Transmission and Communication Characteristics of Helical Ince-Gaussian Beams in Ocean Turbulence Channel

作　　者：戴辉 张鹏[1,2] 何爽 陈航 范云龙 王圆鑫 李晓燕[1,3] 佟首峰[1,2] Dai Hui;Zhang Peng;He Shuang;Chen Hang;Fan Yunlong;Wang Yuanxin;Li Xiaoyan;Tong Shoufeng(National and Local Joint Engineering Research Center of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,Jilin,China;School of OptoElectronic Engineering,Changchun University of Science and Technology,Changchun 130022,Jilin,China;College of Communication Engineering,Jilin university,Changchun 130022,Jilin,China)

机构地区：[1]长春理工大学空间光电技术国家与地方联合工程研究中心,吉林长春130022 [2]长春理工大学光电工程学院,吉林长春130022 [3]吉林大学通信工程学院,吉林长春130022

出　　处：《激光与光电子学进展》2024年第9期165-176,共12页Laser & Optoelectronics Progress

基　　金：国家自然科学基金重点项目(62231005);国家重点研发计划(2022YFB2903400);国家自然科学基金青年科学基金项目(61705019);吉林省国际科技合作项目(20200801053GH)。

摘　　要：为了研究螺旋因斯-高斯(HIG)光束在海洋湍流信道下的传输与通信特性,首先基于随机相位屏法和功率谱反演法,仿真研究了HIG光束经过海洋湍流后的传输性能(光强分布、相位分布、闪烁指数、质心漂移和重叠)与传输距离之间的关系,而后基于对数正态强度概率密度函数进一步分析通信误码率性能。为实现最优传输与通信性能,优化分析HIG不同光束参数(椭圆度、阶数、度数)下的性能规律。仿真结果表明:与高斯光束相比,HIG光束在不同距离下都具有较好的抗湍流能力,其中在100 m海洋湍流信道中(ε=10^(-5)m^(2)∕s^(3),X_(T)=10^(-5)K^(2)∕s,ω=-0.15,η=10^(-3)m,L_(0)=10 m),闪烁指数降低58%,质心漂移降低53%,误码率降低3个数量级。随着湍流强度增加,HIG光束传输与通信性能降低,且相比高斯光束,HIG光束性能改善能力减弱:在相对弱湍流状态下,误码率改善约4个数量级;在相对强湍流状态下,误码率改善约1个数量级。且随着海洋湍流外尺度增加,HIG光束质心漂移小幅增加,其余参数几乎保持不变。经过优化可知,椭圆度、阶数、度数存在最优值,可提高通信性能和传输性能,其中阶数最为敏感。仿真研究结果将有可能为HIG光束应用于水下光通信提供理论依据和技术参考。This study aimed to assess the transmission and communication characteristics of an helical InceGaussian(HIG)beams in ocean turbulence channels.First,the relationship between the transmission performance(intensity distribution,phase distribution,scintillation index,centroid drift,and overlap)and the transmission distances of an HIG beams passing through ocean turbulence was simulated based on the random phase screens and the power spectrum inversion method.Next,communication bit error rate was analyzed based on the lognormal intensity probability density function.Further,the performance of the HIG beams under different beam parameters(ellipticity,order,and degree)was analyzed and optimized to achieve optimal transmission and communication performance.The simulation results revealed that the HIG beams exhibit better antiturbulence ability at different distances compared to the Gaussian beam.In a 100 m ocean turbulence channel(ε=10^(-5)m^(2)∕s^(3),X_(T)=10^(-5)K^(2)∕s,ω=-0.15,η=10^(-3)m,L_(0)=10 m),the scintillation index,the centroid drift and the bit error rate were reduced by 58%,53%,and 3 orders of magnitude,respectively.Further,the transmission and communication performance of the HIG beams decreased with the increase in turbulence intensity,and the performance improvement ability of the HIG beams also decreased compared with the Gaussian beam.The bit error rate improved by about 4 orders of magnitude under relatively weak turbulence,while it improved by about 1 order of magnitude under relatively strong turbulence.When the outer scale of ocean turbulence increased,the centroid drift of the HIG beams increased slightly,while the other parameters were almost unaffected.After optimization,ellipticity,order,and degree can improve the communication and transmission performance of HIG beams,and the order is the most sensitive parameter.The simulation results may provide a theoretical basis and a technical reference for the application of HIG beams in underwater optical communications.

关 键 词：海洋湍流 螺旋因斯-高斯光束 随机相位屏 闪烁指数 质心漂移 重叠 误码率 

分 类 号：O436[机械工程—光学工程]