Acta Optica Sinica, Volume. 39, Issue 10, 1001005(2019)
Propagation Characteristics of Laguerre-Gaussian Vortex Beams in Underwater Turbulence
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.
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Yanling Sun, Jiarui Zhang, Zhenzhong Lu. Propagation Characteristics of Laguerre-Gaussian Vortex Beams in Underwater Turbulence[J]. Acta Optica Sinica, 2019, 39(10): 1001005
Category: Atmospheric Optics and Oceanic Optics
Received: May. 8, 2019
Accepted: Jun. 21, 2019
Published Online: Oct. 9, 2019
The Author Email: Lu Zhenzhong (zzluxidian@126.com)