激光大气传输相位不连续点的探测实验  

Detection of Branch-point in Laser Propagation Through Atmosphere

作　　者：程东杰[1] 范承玉[1] 乔春红[1] 冯晓星[1] 张京会[1] 范玲[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所大气光学中心,安徽合肥230031

出　　处：《大气与环境光学学报》2008年第4期241-249,共9页Journal of Atmospheric and Environmental Optics

基　　金：国家自然科学基金资助课题(10574127);中科院合肥物质科学研究院物质计算中心资助课题

摘　　要：利用30×30 Hartmann-Shack波前传感器对激光在大气中传输时产生的相位不连续点进行了探测。实验结果与数值模拟结果对比分析表明:强湍流条件下,探测到了相位不连续点,实验结果与数值模拟结果基本相符,并充分说明了相位不连续点是成对出现的。利用激光大气传输四维程序对激光大气传输相位不连续性问题进行了数值计算,分析了发射口径和网格精度对相位不连续点数密度的影响。The branch points in laser propagation through atmosphere are detected with 30×30 Hartmann- Shack wave-front sensor. It is shown that there is branch points in beacon light phase in strong scintillation, and the results agree with the simulated data. It is proved that branch points appear in pair. The branch point problem is computed by four-dimension code of laser propagating in atmosphere. The effects of emission diameter and grid precision on the position and account of branch points are analyzed.

关 键 词：大气湍流 传输 相位不连续点 

分 类 号：TN241[电子电信—物理电子学]