强湍流效应下光束漂移特性的数值分析  

Numerical analysis of beam wander under strong fluctuation conditions

作　　者：汤汇 范承玉 TANG Hui;FAN Chengyu(Key Laboratory of Atmospheric Optics,Anhui Institute of Optic and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院合肥物质科学研究院安徽光学精密机械研究所,中国科学院大气光学重点实验室,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026

出　　处：《大气与环境光学学报》2023年第5期420-425,共6页Journal of Atmospheric and Environmental Optics

基　　金：国家自然科学基金(61605223);中国科学院战略重点研究计划(614A010717)。

摘　　要：为研究强湍流效应下大气湍流外尺度与内尺度对高斯波束光斑漂移特性的影响,首先利用修正的von Karman谱,分别推导出高斯光束在聚焦和准直条件下传输的光束漂移方差表达式,并且利用实验数据进行验证;进而根据所推导的光束漂移表达式,利用数值分析方法,对不同内外尺度条件下的光束漂移特性进行研究。研究结果表明外尺度的增大会加强光束漂移效应,而内尺度的变化对光束漂移特性无显著影响。In order to study the influence of outer scale and inner scale of atmospheric turbulence on the spot wander characteristics of Gaussian beam under strong fluctuation conditions,the variance expressions of beam wander of Gaussian beam in focusing and collimating conditions are derived firstly by using the modified von Karman spectrum,and verified by experimental data.Then,according to the derived beam wander expression,the characteristics of beam wander under different inner and outer scales are studied using numerical analysis method.The results show that the increase of outer scale will strengthen the effect of beam wander,while the change of inner scale has no significant effect on the characteristics of beam wander.

关 键 词：强湍流 光束漂移 内尺度 外尺度 

分 类 号：P427.1[天文地球—大气科学及气象学]