Application of phase-conjugate beams in beam correction and underwater optical wireless communication subject to surface wave turbulence

doi:10.1007/s12200-022-00039-y

Front. Optoelectron.

2022, Vol. 15

Issue (3) : 37 https://doi.org/10.1007/s12200-022-00039-y

RESEARCH ARTICLE

Application of phase-conjugate beams in beam correction and underwater optical wireless communication subject to surface wave turbulence

Qi Li¹(

), Xiuhua Yuan¹, Feng Zhou^1,², Zeyu Zhou¹, Wujie Liu¹

¹. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
². Key Laboratory of Hunan Province On Information Photonics and Freespace Optical Communications, School of Information Science and Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China

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Abstract

Water surface wave turbulence is one of the factors affecting the performances of underwater optical wireless communication (UOWC) systems. In our research, a phase-conjugate beam was used to correct the beam distortion and enhance the communication performances when a system is subject to surface wave turbulence. The phase-conjugate beam was generated by a phase-conjugate mirror (PCM), and a turbulence generator was used to generate surface wave turbulence in the experiment. We calculated the beam centroid distribution and the results showed that the phase-conjugate beam had a better propagation performance than the distorted beam at the different water depths. The root mean square (RMS) of the beam centroid for the phase-conjugate beam was 11 times less than that for the distorted beam, which meant that the phase-conjugate beam could effectively correct the beam drift. We further investigated the scintillation index and the signal-to-noise ratio (SNR); the results showed that the phase-conjugate beam was able to reduce the scintillation and an obvious improvement in SNR could be obtained. This research has the potential to be applied in UWC.

Keywords Phase-conjugate beam Underwater optical wireless communication (UOWC) Degenerate four-wave mixing (DFWM) Surface wave turbulence

Corresponding Author(s): Qi Li

Issue Date: 26 October 2022

Cite this article:

Qi Li,Xiuhua Yuan,Feng Zhou, et al. Application of phase-conjugate beams in beam correction and underwater optical wireless communication subject to surface wave turbulence[J]. Front. Optoelectron., 2022, 15(3): 37.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-022-00039-y
https://academic.hep.com.cn/foe/EN/Y2022/V15/I3/37

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