Jan. 2022

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Chinese Optics> 2022> 15(1): 111-118.

LU Teng-fei, LIU Yong-xin, WU Zhi-jun. Experimental investigation on propagation characteristics of vortex beams in underwater turbulence with different salinity[J]. Chinese Optics, 2022, 15(1): 111-118. doi: 10.37188/CO.EN.2021-0001

Citation:

LU Teng-fei, LIU Yong-xin, WU Zhi-jun. Experimental investigation on propagation characteristics of vortex beams in underwater turbulence with different salinity[J].Chinese Optics, 2022, 15(1): 111-118.doi:10.37188/CO.EN.2021-0001

Citation:

LU Teng-fei, LIU Yong-xin, WU Zhi-jun. Experimental investigation on propagation characteristics of vortex beams in underwater turbulence with different salinity[J].Chinese Optics, 2022, 15(1): 111-118.doi:10.37188/CO.EN.2021-0001

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Experimental investigation on propagation characteristics of vortex beams in underwater turbulence with different salinity

doi:10.37188/CO.EN.2021-0001

Fujian Provincial Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021

Funds:Supported by National National Science Foundation of China (No. 61505059, No. 61575070, No. 61275203); Postgraduates’ Innovative Fund in Scientific Research of Huaqiao University

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Author Bio:
LU Teng-fei (1994—), male, born in Zhoukou, Henan, master student. His research interest is laser transmission and transformation. E-mail:1805440176@qq.com
LIU Yong-xin (1979—), female, born in Dingzhou, Hebei, Ph. D., associate professor. Her research interest covers laser transmission and transformation. E-mail:yongxin@hqu.edu.cn
Corresponding author:yongxin@hqu.edu.cn
Received Date:19 Jan 2021
Rev Recd Date:01 Mar 2021

Available Online:30 Apr 2021

Publish Date:19 Jan 2022

Abstract

Abstract

It is very important to study the propagation characteristics of light beams in ocean turbulence. In order to get closer to the actual situation, we build a device which can control both the salinity and the intensity of underwater turbulence to study the propagation characteristics of vortex beams and a Gaussian beam in underwater turbulence. The results show that compared with the underwater turbulence without sea salt, the light spot will be more diffuse and the light intensity will be weaker in the underwater turbulence with sea salt. When the topological charge mis 2, the scintillation index of the vortex beam in the underwater turbulence with salinity of 4.35‰ is larger than that in the underwater turbulence with salinity of 2.42‰, no matter it is strong turbulence or weak turbulence. When the vortex beam with m=2 propagates to the same distance, the scintillation index increases with the increment of the salinity and the intensity of underwater turbulence. Under different salinity conditions, the radial scintillation index of the vortex beam with m=2 decreases firstly and then increases with the increase of the radial distance. In addition, we set up another experimental device which can transmit a longer distance. The scintillation index of the vortex beam with m=2 is much higher than that of the Gaussian beam in the underwater turbulence within 20 m propagation distance, and the scintillation indices of both the vortex beam with m=2 and the Gaussian beam increase with the increase of the propagation distance.
- vortex beam,
- underwater turbulence,
- scintillation index,
- salinity,
- propagation

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References (28)

References

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