The Influence of Backscattering Angle on Full-duplex Underwater Wireless Optical Communication

HAN Biao; LIU Bin; ZHANG Yu; MA Lin; LIU Yutong; KANG Yongqiang

doi:10.13756/j.gtxyj.2025.250003

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The Influence of Backscattering Angle on Full-duplex Underwater Wireless Optical Communication

更新时间：2025-08-16

- The Influence of Backscattering Angle on Full-duplex Underwater Wireless Optical Communication
- Study on Optical Communications Issue 4, (2025)
- 作者机构：
  
  1.西安电子科技大学　光电工程学院，西安　710071
  2.中海辉固地学服务（深圳）有限公司，广东　深圳　518000
  3.国家海洋技术中心，天津　300112
  4.三亚学院　新能源与智能网联汽车学院，海南　三亚　572022
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2025.250003
  CLC： TN929
- Received：03 January 2025，
  
  Revised：03 April 2025，
  
  Published：10 August 2025
- 稿件说明：
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韩彪，刘彬，张宇，等. 后向散射角度对水下全双工无线光通信的影响[J]. 光通信研究，2025(4): 250003.

Han B, Liu B, Zhang Y, et al. The Influence of Backscattering Angle on Full-duplex Underwater Wireless Optical Communication[J]. Study on Optical Communications, 2025(4): 250003.
韩彪，刘彬，张宇，等. 后向散射角度对水下全双工无线光通信的影响[J]. 光通信研究，2025(4): 250003. DOI： 10.13756/j.gtxyj.2025.250003.

Han B, Liu B, Zhang Y, et al. The Influence of Backscattering Angle on Full-duplex Underwater Wireless Optical Communication[J]. Study on Optical Communications, 2025(4): 250003. DOI： 10.13756/j.gtxyj.2025.250003.

摘要

【目的】

光在水中传输时的后向散射是影响双向水下无线光通信（UWOC）传输稳定性的主要因素之一，在全双工UWOC系统中，可以利用接收机内部的滤光片抑制这种噪声。然而，滤光片的透射波长随着光束入射角度会发生“蓝移”现象，因此后向散射噪声的角度分布特征会对这种通信体制的噪声抑制能力产生影响。

【方法】

针对这一问题，文章利用蒙特卡洛方法构建了仿真模型，定性研究了后向散射噪声的角度分布特征，并结合光学滤光片的角度特性分析了其对通信系统性能的影响。

【结果】

结果表明，对于大角度发射和接收的全双工UWOC系统，后向散射噪声的角度分布比较分散，这对UWOC系统中发射波长小于接收波长的通信设备影响较大。工程应用中，在不影响UWOC系统链路建立效率、设备结构复杂度和有效通信距离等指标的前提下，可以通过适当减小通信发射角、接收孔径和视场，增大通信设备中发射机和接收机的间距以及双向光信号的波长间隔等方法抑制这种影响。利用这种设计思路，文章采用450和520 nm的蓝绿光搭建了发射角和接收视场约为50°的全双工UWOC系统，在2.2~13.2 m的距离内，两个链路分别实现了89.6和84.8 Mbit/s的文件传输速率。

【结论】

文章研究结果对于设计大角度发射和接收的全双工UWOC系统具有参考意义。

Abstract

【Objective】

In bidirectional Underwater Wireless Optical Communication (UWOC) system

backscattering is one of the major factors which affect its stability. In a full-duplex UWOC system

such noise could be removed by optical filter in the receiver. However

because the transmission wavelength of filter would be “blue shift” with incident angle of light

the backscattering angle will affect the noise suppression performance.

【Methods】

In this paper

a theoretical model is constructed by Monte Carlo method to qualitatively study the angle distribution characteristics of backscattering noise and its influence on UWOC performance.

【Results】

The results show that

angle distribution of backscattering noise is relatively dispersed in full-duplex UWOC system with large divergence angle and filed. It has a great influence on the equipment whose transmitting wavelength is smaller than the receiving one. In engineering applications

without affecting the link establishment efficiency

equipment structural complexity

and effective communication distance of the UWOC system

the impact can be mitigated by appropriately reducing the communication transmission angle

receiver aperture

and field of view

increasing the spacing between the transmitter and receiver in the communication equipment

and enlarging the wavelength interval of the bidirectional optical signals. Using this method

a full-duplex UWOC system is built with about 50° transmitting angle and field based on 450 and 520 nm blue-green light. In the communication distance of 2.2~13.2 m

the file transmitting rates are 89.6 and 84.8 Mbit/s for the two transmission links respectively.

【Conclusion】

The research results in this paper are helpful to design a full-duplex UWOC system with large transmitting and receiving angles.

关键词

Keywords

references

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