Frontiers of Optoelectronics, 2022, 15 (3): s12200, 网络出版: 2023-01-21  

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

Application of phase-conjugate beams in beam correction and underwater optical wireless communication subject to surface wave turbulence
作者单位
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
摘要
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.
参考文献

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Qi Li, Xiuhua Yuan, Feng Zhou, Zeyu Zhou, Wujie Liu. Application of phase-conjugate beams in beam correction and underwater optical wireless communication subject to surface wave turbulence[J]. Frontiers of Optoelectronics, 2022, 15(3): s12200. Qi Li, Xiuhua Yuan, Feng Zhou, Zeyu Zhou, Wujie Liu. Application of phase-conjugate beams in beam correction and underwater optical wireless communication subject to surface wave turbulence[J]. Frontiers of Optoelectronics, 2022, 15(3): s12200.

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