高空湍流影响下航空激光传输性能分析  

Analysis about the influence of high altitude atmosphere turbulence on airborne laser communication

作　　者：赵静[1] 赵尚弘[1] 李勇军[1] 赵卫虎[2] 刘韵[1] 李轩[1] ZHAO Jing ZHAO Shang-hong LI Yong-jun ZHAO Wei-hu LIU Yun LI Xuan(School of Information and Navigation, Air Force Engineering University, Xi＇an 710077, China Xi＇an Communications Institute, Xi＇an 710106, China)

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077 [2]西安通信学院,陕西西安710106

出　　处：《激光与红外》2017年第6期663-668,共6页Laser & Infrared

基　　金：中国博士后科学基金资助项目(No.2012M512066)资助

摘　　要：采用"Clear 1"折射率起伏湍流模型对高空大气湍流进行描述,通过仿真建立了高空湍流信道气动光学效应影响模型,分析了光斑尺寸与飞行高度、激光波长、传输距离的关系;研究了gamma-gamma大气湍流信道下光强闪烁因子随接收孔径尺寸、飞行参数的变化特征。结果表明:(1)光斑尺寸受气动光学影响而增大,低空传输条件下光斑尺寸大于高空;(2)光斑尺寸随波长增加而增大;在相同条件下,波长为800 nm激光的光斑尺寸受气动光学影响最大;(3)闪烁指数仅与接收孔径大小有关,并随着传输距离的增大而逐渐增加,当闪烁指数超过1,其增加幅度降低并逐渐达到最大值。The high altitude atmosphere turbulence is described by the ＂Clear 1＂ refractive-index fluctuant turbulence model. The aero-optics effects model of the high altitude turbulence channel was established, and the relation of beam spot size, flight altitude, wavelength and transmission distance was analyzed. The changes of scintillation factor with receiver aperture and flight parameters were discussed in the gamma-gamma atmosphere turbulence channel. The re- sults show that ： （1）spot size increases under the effect of aero-optics, and spot size in the low altitude is larger than that in high altitude ; （2）spot size increases with the increase of wavelength, and spot size at wavelength of 800 nm is most effected by the aero-opties;（3）scintillation index only relates to the receiver aperture, and it gradually increases with the increase of transmission distance ;when the scintillation index exceeds 1,it increases slowly and reaches the peak value gradually.

关 键 词：航空激光通信 大气湍流 气动光学 光强闪烁 

分 类 号：TN929[电子电信—通信与信息系统]