部分相干光在大气湍流中水平传输路径上的展宽与漂移

发布时间：2018-06-10 06:18

本文选题：光通信 + 光束扩展　；参考：《光学学报》2014年11期

【摘要】：基于部分相干高斯谢尔模型(GSM)光束在强湍流中的光束扩展半径,利用Andrews和Philips经典漂移方差模型推导了部分相干光在中强弱大气湍流中水平传输的漂移方差表达式,讨论了部分相干光在中、强、弱大气湍流中的展宽和漂移特性。结果表明:部分相干光的光束扩展受湍流的影响比受完全相干光的影响要小,初始半径越小的光束受到湍流的影响越大。短距离传输时,不同波长引起的光束漂移差别很小,且随着初始光束半径的增大这种差别随之减小。传输距离大于2km时,中强湍流中光束漂移均与波长有关且强湍流区漂移量较为明显。传输距离在10km内,光束空间相干长度大于0.005m时,光源空间相干长度对漂移的影响很小。
[Abstract]:Based on the beam propagation radius of partially coherent Gao Si Schell model in strong turbulence, the drift variance expression of partially coherent light propagating horizontally in medium and weak atmospheric turbulence is derived by using the classical drift variance model of Andrews and Philips. The broadening and drift characteristics of partially coherent light in medium, strong and weak atmospheric turbulence are discussed. The results show that the propagation of partially coherent beams is less affected by turbulence than by completely coherent light, and the smaller the initial radius is, the greater the effect of turbulence is. In short distance propagation, the difference of beam drift caused by different wavelengths is very small, and the difference decreases with the increase of the initial beam radius. When the propagation distance is larger than 2km, the beam drift in medium and strong turbulence is related to wavelength and the drift in strong turbulence region is obvious. When the propagation distance is in 10km and the beam spatial coherence length is greater than 0.005m, the spatial coherent length of the light source has little effect on the drift.
【作者单位】：西安理工大学自动化与信息工程学院;
【基金】：国家自然科学基金(61377080,60977054,61271110) 陕西省“13115”科技统筹计划(2011KTCQ01-31) 陕西省教育厅产业化培育基金(2010JC17) 陕西省自然科学基础研究计划(2013JQ8011) 陕西省教育厅科研计划(2013JK1104) 陕西省工业攻关科技计划项目(2013K06-08) 西安市科技成果转换基金(CX12165)
【分类号】：TN929.12

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