湍流尺度和相干参数对传输光强的影响  

The Influence of turbulence scale and coherence parameters on transmitted light intensity

作　　者：毛鑫峰 吴昊[1] 覃万富 周鹏[1] 顾金林 MAO Xin-feng;WU Hao;QIN Wan-fu;ZHOU Peng;GU Jin-lin(China Satellite Maritime Tracking and Controlling Department,Jiangyin 214400,China)

机构地区：[1]中国卫星海上测控部,江苏江阴214400

出　　处：《激光与红外》2021年第1期100-106,共7页Laser & Infrared

摘　　要：文章利用交叉谱密度函数得到了部分相干光的光强表达式,利用该表达式分析了斜程大气传输中湍流内外尺度、光源相干参数、天顶角对接收光强的影响。结果表明:斜程大气传输过程中,光源相干参数ζs越大,接收光强受湍流内外尺度变化的影响越小。在传输距离小于4 km时,湍流内外尺度变化对接收光强的影响可以忽略不计。相干参数对小天顶角时的光强影响较大,随着天顶角的的增大,大气湍流对接收光强影响占主导作用,光源相干参数对接收光强的影响减弱。最后,对数值模拟结果给出了解释。The intensity expression of partially coherent light is obtained by using cross spectral density function in the paper.The influence of turbulence internal and external scales,coherent parameters of light source and zenith Angle on the received light intensity is analyzed.The larger the parameters of the light source,the smaller the influence of the received light intensity on the internal and external scales of turbulence in the process of atmospheric propagation at slant range.When the transmission distance is less than 4 km,the influence of turbulence internal and external scale changes on the received light intensity can be ignored.Coherent parameters have a great influence on the light intensity at a small zenith Angle.With the increase of zenith Angle,atmospheric turbulence plays a dominant role in the influence of the received light intensity,and the influence of coherent parameters of the light source on the received light intensity is weakened.Finally,the numerical simulation results are explained.

关 键 词：大气湍流 斜程传输 部分相干 光强分布 相干长度 

分 类 号：TN29[电子电信—物理电子学]