湍流大气中涡旋光束的光强分布及光学涡旋的漂移

葛筱璐; 魏功祥; 刘晓娟; 国承山

doi:doi:10.3788/aos201636.1026015

光学学报, 2016, 36 (10): 1026015, 网络出版: 2016-10-12

湍流大气中涡旋光束的光强分布及光学涡旋的漂移下载： 1260次

Intensity Distribution and Optical Vortex Wander of Vortex Beams Propagating in Turbulent Atmosphere

论文大纲

葛筱璐 ^1,2,*魏功祥 ¹刘晓娟 ¹国承山 ²

作者单位

¹ 山东理工大学理学院，山东淄博 255049

² 山东师范大学物理与电子科学学院，山东济南 250014

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摘要

数值模拟了拉盖尔-高斯涡旋光束在湍流大气中传输时的光强分布和光学涡旋的漂移。由模拟结果可知，当涡旋光束在湍流大气中传输时，光强分布由最初的环形结构变为平顶结构，最终在远场演化为高斯分布；光强廓线的演变过程与传输距离、湍流强度、湍流外尺度、涡旋光束拓扑荷数、束腰宽度以及光波长有关，与湍流内尺度无关。光学涡旋在接收面的不同位置处出现的频次满足高斯分布；随着传输距离的增加、湍流的增强或涡旋光束拓扑荷数的增加，光学涡旋的漂移范围增大且在不同位置处出现的频次偏离高斯分布；适当选择涡旋光束的束腰宽度会减小光学涡旋的漂移。

Abstract

The intensity distribution and the wander of optical vortices of Laguerre-Gaussian beams propagating in turbulent atmosphere are simulated numerically. The results indicate that intensity profiles of vortex beams experienced successive variation from annular structures to flattened-top profiles and finally to Gaussian profiles with the propagation. The variation is closely related with the propagation distance, the turbulence strength, the outer scale of turbulence, the number of topological charge, the width of beam waist and the wavelength of vortex beam. However, the variation is nothing to do with the inner scale of turbulence. The wandering behavior of optical vortices in the atmosphere is described by the occurrence number on a transverse plane. The results show that the occurrence number on the receiver plane follows Gaussian statistics. As the propagation distance, the turbulence strength, or the topological charge of the vortex beam increases, the Gaussian fitting curves become broader, and the statistics of vortex position tends to random distribution. In addition, choosing the suitable width of the vortex beam waist can reduce the wander of optical vortices.

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葛筱璐, 魏功祥, 刘晓娟, 国承山. 湍流大气中涡旋光束的光强分布及光学涡旋的漂移[J]. 光学学报, 2016, 36(10): 1026015. Ge Xiaolu, Wei Gongxiang, Liu Xiaojuan, Guo Chengshan. Intensity Distribution and Optical Vortex Wander of Vortex Beams Propagating in Turbulent Atmosphere[J]. Acta Optica Sinica, 2016, 36(10): 1026015.

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