大气信道激光通信系统光束偏振特性  

Polarization Characteristics of Laser Communication System in Atmospheric Channel

作　　者：陶宗慧 刘唯奇 陈亚楠 倪小龙[1] 娄岩[1] 刘显著[1] 姜会林[1] TAO Zonghui;LIU Weiqi;CHEN Yanan;NI Xiaolong;LOU Yan;LIU Xianzhu;JIANG Huilin(Institute of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,Jilin,China;Unit 63856 of PLA,Baicheng 137001,Jilin,China;Science and Technology on Electro-Optical Information Security Control Laboratory,China Electronics Technology Group Corporation,Tianjin 300308,China)

机构地区：[1]长春理工大学空间光电技术研究所,吉林长春130022 [2]63856部队,吉林白城137001 [3]中国电子科技集团公司光电信息控制和安全技术重点实验室,天津300308

出　　处：《兵工学报》2022年第3期481-488,共8页Acta Armamentarii

基　　金：国家自然科学基金项目(62105042、61890960、61890963);吉林省科技厅自然科学基金项目(20190201271JC);高等学校学科创新引智计划项目(D21009);装备预先研究重点实验室基金项目(2021JCJQLB055016)。

摘　　要：不同偏振特性光束受大气影响特性不尽相同,合理选取最优偏振态光束作为激光通信系统光源,可大大降低通信系统受大气湍流的影响。研究不同初始偏振态激光光束在大气中传输的光强闪烁效应,给出偏振态激光光束经大气传输后闪烁因子的表达式。设计并制作多参数高精度可控激光光源,并采用大气湍流模拟装置来模拟大气湍流,对不同初始偏振态激光光束在大气湍流中传输的光强闪烁效应进行实验研究。结果表明:当偏振角θ取值范围为45°≤θ<90°时,光束经过大气湍流传输后的闪烁因子随着θ的增大而减小;当0°<θ≤45°时,光束经过大气湍流传输后的闪烁因子随着θ的减小而减小;左旋圆偏振和右旋圆偏振激光光束的光强闪烁因子随湍流强度的变化趋势基本相同;与线偏振激光光束相比,左旋偏振光和右旋偏振光在相同的大气湍流强度下其光强闪烁因子均小于任何偏振角度的线偏振光;通过对激光通信系统的偏振态进行优化,可以有效抑制大气湍流对激光通信系统的影响,降低接收端光强起伏,降低激光通信系统误码率,有效提高激光通信系统性能。The intensity scintillation effects of different initial polarized laser beams transmitted in atmosphere are studied,while the expression of intensity scintillation of polarized laser beams is given.A new multi-parameter high-precision controllable laser light source was designed,and a simulation device was used for atmospheric turbulence simulation.The scintillation effects of laser beams with different initial polarization states in atmospheric turbulence were researched experimentally.The results show that the scintillation factor decreases with the increase in the polarizing angle when the polarizing angle is 45°≤θ<90°.For 0°<θ≤45°,the scintillation factor decreases with the decrease in the polarizing angle.The scintillation factors of left-and right-hand circularly polarized laser beams vary with turbulence intensity in a similar way.Compared with linearly polarized laser beams,the intensity scintillation factors of left-and right-hand polarized laser beams under the same atmospheric turbulence are smaller than that of linearly polarized light at any polarizing angle.By optimizing the polarization state of the laser communication system,the influence of atmospheric turbulence on the laser communication system can be effectively suppressed,the intensity fluctuation of the receiver and the bit error rate of the laser communication system can be reduced,and the performance of the laser communication system can be effectively improved.

关 键 词：大气信道 激光通信 偏振态 大气湍流 光强闪烁 偏振优化 

分 类 号：E963[军事—军事通信学]