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高斯波束在湍流大气斜程传输中的闪烁问题研究
引用本文:易修雄,郭立新,吴振森.高斯波束在湍流大气斜程传输中的闪烁问题研究[J].光学学报,2005,25(4):33-438.
作者姓名:易修雄  郭立新  吴振森
作者单位:西安电子科技大学理学院,西安,710071
基金项目:国家自然科学基金(60101001),高等学校优秀青年教师教学和科研奖励计划资助课题。
摘    要:根据光波斜程传输理论以及随高度变化的ITU-R湍流大气结构常数模型,将水平传输的修正里托夫方法推广到了斜程传输问题中。导出了高斯波束入射时,在零内尺度湍流谱模型及考虑湍流内尺度效应和外尺度效应条件下,从弱起伏湍流区到强起伏湍流区闪烁指数随斜程里托夫方差变化的计算公式。讨论了不同传播高度、不同湍流内、外尺度对高斯波束斜程传输闪烁指数的影响。最后将有关数值计算结果与实验测量结果进行了比较和验证。

关 键 词:大气光学  高斯波束  光波闪烁  斜程传输  修正里托夫解
收稿时间:2004/4/12

Study on the Optical Seintillation for Gaussian Bearm Propagation in the Slant Path through the Atmospheric Turbulence
Yi Xiuxiong,Guo Lixin,Wu Zhensen.Study on the Optical Seintillation for Gaussian Bearm Propagation in the Slant Path through the Atmospheric Turbulence[J].Acta Optica Sinica,2005,25(4):33-438.
Authors:Yi Xiuxiong  Guo Lixin  Wu Zhensen
Abstract:Based on the theory of optical wave propagation in the slant path and the ITU-R turbulence structure constant model which is dependent on altitude, the modified Rytov method, which is applicable to the optical wave propagation in the horizontal path, is extended to the propagation in the slant path. The formula of scintillation index as a function of the Rytov variance is derived and obtained from weak to strong fluctuation regions with Gaussian beam incidence, and the effect of the turbulence spectrum model with zero and non-zero inner scale in addition to a finite outer scale is included. The influence of different altitudes, different sizes of the inner and outer scale of the turbulence on the scintillation index with Gaussian beam propagation in the slant path is discussed in detail. Finally, the numerical results are compared and verified with the experimental data.
Keywords:atmospheric optics  Gaussian beam  optical scintillation  propagation in the slant path  the modified Rytov method  
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