激光大气传输相干长度实验研究  

Research on Coherence Length of Laser Propagation in the Atmospheric Turbulence

作　　者：娄岩[1] 任志鹏[2] 陈纯毅[1] 董科研[1] 付强[1] 

机构地区：[1]长春理工大学空间光电技术研究所,长春130022 [2]长春理工大学国有资产处,长春130022

出　　处：《长春理工大学学报（自然科学版）》2013年第6期50-53,共4页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金项目(61007046);吉林省科技发展计划项目(201101096)

摘　　要：通过激光水平大气传输实验,对接收的光强闪烁和光斑尺度特征进行记录。在强湍流条件下,利用光强闪烁计算出大气折射率结构常数C2n,并以此反演大气相干长度r0,从而计算出光斑尺度;通过与实际测量得到的等效光斑尺度进行对比分析发现:二者存在一定偏差,在r0小于0.055m的条件下相差大约200μm2,但是其量级和时间变化趋势上基本一致,分析了误差产生的原因。The measurements experiment of laser propagation was taken in this paper. Under the strong turbulence, the structure constant of refractive index Cn2 is computed using scintillation fluctuation and predict atmospheric coherence length r0 for horizontal paths, later the spot size was computed. Compared with measured data of spot size, there is a certain deviation with 200μm2 from each other under the conditions of r0〈0.055m, but the time variation is similar, at last, various errors caused by both theory and experiment are analyzed and discussed.

关 键 词：大气相干长度 激光大气传输 光强闪烁 光斑尺度 

分 类 号：TN929.1[电子电信—通信与信息系统]