Zhao Shengmei, Zhang Wenhao, Wang Le, Li Wei, Gong Longyan, Cheng Weiwen, Chen Hanwu, Gruska Jozef
Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications(NUPT), Nanjing, 210003, China.
Information Physics Research Center and Department of Applied Physics, NUPT, Nanjing, China.
Sci Rep. 2019 Feb 14;9(1):2025. doi: 10.1038/s41598-018-38409-2.
In this paper, we report on experimental demonstration of the propagation and self-healing property of Bessel-Gaussian (BG) beam carrying orbital angular momentum (OAM) in an underwater environment. Especially, the effects of topological charge, temperature gradient, and salinity on the transmission and self-reconstruction of BG beam in underwater turbulence are analyzed. The results show that the detection probabilities both for propagation and self-healing greatly decrease with temperature gradient, and gradually decrease with salinity. BG beam has a self-healing property in the underwater environment when the obstruction is quite small. The detection probability greatly decreases with obstruction size, while it gradually decreases with salinity fluctuations for different obstruction sizes. For the same blockage ratio, the smaller topological charge of BG beam is, the better self-healing characteristics the BG beam has.
在本文中，我们报告了携带轨道角动量（OAM）的贝塞尔 - 高斯（BG）光束在水下环境中传播和自愈合特性的实验演示。特别地，分析了拓扑电荷、温度梯度和盐度对BG光束在水下湍流中传输和自重构的影响。结果表明，传播和自愈合的检测概率均随温度梯度大幅降低，并随盐度逐渐降低。当障碍物很小时，BG光束在水下环境中具有自愈合特性。检测概率随障碍物尺寸大幅降低，而对于不同的障碍物尺寸，它随盐度波动逐渐降低。对于相同的阻塞率，BG光束的拓扑电荷越小，其自愈合特性越好。
