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一般非Kolmogorov大气湍流路径上平面波闪烁的数值模拟分析

Simulation of the Scintillation Index of Plane Wave Propagating through General Non-Kolmogorov Atmospheric Turbulence Path

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摘要

利用数值模拟的方法研究了平面波在弱湍流大气中沿水平路径传播时的闪烁特性,得到了传播路径上既包含Kolmogorov 湍流(简称K 湍流)又包含非Kolmogorov 湍流(简称非K 湍流)时,平面波的闪烁指数与光传播距离、非K湍流谱标度指数、非K 湍流所占百分比等参数之间的关系。对比分析了平面波在混合湍流路径下的闪烁效应与在单独K 湍流和非K 湍流下的闪烁效应。结果表明:当路径上湍流为K 湍流和非K 湍流的组合,且非K 湍流谱一定时,闪烁指数随传播路径上非K 湍流所占百分比的增加而增加,随K 湍流所占百分比的增加而下降;当传播路径上只有非K 湍流时,闪烁指数随非K 湍流谱幂率的增加呈先增加后下降的趋势。

Abstract

The scintillation index of plane wave propagating through weak turbulent atmosphere, which contains Kolmogorov turbulence and non-Kolmogorov turbulence, are studied by using the numerical methods. The impacts of propagation distance on the irradiance scintillation index are analysed, and the impacts of spectral power law values and the percentage of non-Kolmogorov are also considered. The scintillation effects of plane wave propagation in mix turbulent path and in single turbulent path with Kolmogorov turbulence or non-Kolmogorov turbulence are compared. The results show that the scintillation index increases with the percentage of non-Kolmogorov turbulence increasing for one spectral power law, while Kolmogorov turbulence does the opposite in conditions of mix turbulent path. Besides, as the power law increases, the non-Kolmogorov scintillation index increases with power law up to the peak value, and then decreases with the further increase in power law in weak turbulent atmosphere.

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中图分类号:O436;P421

DOI:10.3788/lop52.0701004

所属栏目:大气与海洋光学

基金项目:国家自然科学基金(61107066)

收稿日期:2015-01-28

修改稿日期:2015-03-20

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李玉杰:中国科学院安徽光学精密机械研究所大气光学重点实验室, 安徽 合肥 230031中国科学院大学, 北京 100049
朱文越:中国科学院安徽光学精密机械研究所大气光学重点实验室, 安徽 合肥 230031
钱仙妹:中国科学院安徽光学精密机械研究所大气光学重点实验室, 安徽 合肥 230031
饶瑞中:中国科学院安徽光学精密机械研究所大气光学重点实验室, 安徽 合肥 230031中国科学院大学, 北京 100049中国科学技术大学环境科学与光电技术学院, 安徽 合肥 230031

联系人作者:李玉杰(liyujie1017@126.com)

备注:李玉杰(1990—),女,博士研究生,主要从事激光大气传输的数值模拟等方面的研究。

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引用该论文

Li Yujie,Zhu Wenyue,Qian Xianmei,Rao Ruizhong. Simulation of the Scintillation Index of Plane Wave Propagating through General Non-Kolmogorov Atmospheric Turbulence Path[J]. Acta Optica Sinica, 2015, 35(7): 0701004

李玉杰,朱文越,钱仙妹,饶瑞中. 一般非Kolmogorov大气湍流路径上平面波闪烁的数值模拟分析[J]. 光学学报, 2015, 35(7): 0701004

被引情况

【1】李玉杰,钱仙妹,朱文越,苗锡奎. 高能固态激光非Kolmogorov湍流大气传输光斑扩展的数值分析. 光学学报, 2018, 38(6): 601002--1

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