光学学报, 2019, 39 (10): 1001005, 网络出版: 2019-10-09   

拉盖尔-高斯涡旋光束在水下湍流中的传输特性 下载: 1050次

Propagation Characteristics of Laguerre-Gaussian Vortex Beams in Underwater Turbulence
作者单位
西安电子科技大学物理与光电工程学院, 陕西 西安 710071
摘要
提出了一种基于涡旋光干涉条纹偏移检测的水下湍流识别方法。利用随机相位屏法对拉盖尔-高斯光束在湍流中的传输及干涉特性进行理论模拟。在此基础上,实验研究了不同拓扑荷数涡旋光束经湍流场后与高斯光束干涉所得条纹的偏移特性。实验及理论结果表明:在较强湍流环境中,拓扑荷数越大,涡旋光束传输能力越强;相同湍流强度下,拓扑荷数越大,干涉条纹位置偏移量越小;相同拓扑荷数涡旋光的干涉条纹偏移量随湍流强度的增大而增大。这表明,涡旋光干涉条纹偏移检测法可有效地检测湍流强度,识别舰船尾流。
Abstract
An underwater turbulence recognition method based on the detection of vortex interference stripe displacement is proposed. The transmission and interference characteristics of the Laguerre-Gaussian beam in underwater turbulence are simulated using the random phase screen method. The displacement characteristics of the stripes caused by the interference between vortex beams with different topological charges and Gauss beams in free space after turbulence are studied and experimentally analyzed. Experimental and theoretical results show that in a strong turbulent environment, the larger the topological charge, the better the transmission ability of the vortex beams propagating in the turbulence; under the same turbulence intensity, the larger the topological charge, the smaller the displacement of the position of interference stripes. The displacement of interference stripes increases with increasing turbulence intensity of vortex beams with similar topological charges. This indicates that the method for detecting the displacement of vortex interference stripes can effectively detect turbulence intensity and ship wake.

孙艳玲, 张家瑞, 鲁振中. 拉盖尔-高斯涡旋光束在水下湍流中的传输特性[J]. 光学学报, 2019, 39(10): 1001005. Yanling Sun, Jiarui Zhang, Zhenzhong Lu. Propagation Characteristics of Laguerre-Gaussian Vortex Beams in Underwater Turbulence[J]. Acta Optica Sinica, 2019, 39(10): 1001005.

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