蒙特卡洛法仿真激光在水下信道中的传输特性

韩笑天; 廖佩璇; 李鹏; 汪伟; 谢小平; 李怀亮; 魏佳广; 冯晓伟; 徐善志

doi:10.13756/j.gtxyj.2023.04.009

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蒙特卡洛法仿真激光在水下信道中的传输特性

专题：水下光通信技术 | 更新时间：2023-08-14

- 蒙特卡洛法仿真激光在水下信道中的传输特性
- Monte Carlo Simulation on Laser Transmission Characteristics in an Underwater Channel
- 光通信研究 2023年第4期页码：53-59
- 作者机构：
  
  1.中国科学院　西安光学精密机械研究所　a.光子网络技术研究室；b.瞬态国家重点实验室，西安　710119
  2.中国科学院大学　未来技术学院，北京　101408
  3.海洋石油工程股份有限公司安装分公司，天津　300461
- 作者简介：
  
  韩笑天（1996-），男，陕西渭南人。博士，主要研究方向为水下无线光通信。
  谢小平，研究员。E-mail：xxp@opt.ac.cn
- 基金信息：
  
  国家重点研发计划资助项目(2021YFC2800504;2022YFC2806000)
- DOI：10.13756/j.gtxyj.2023.04.009
  中图分类号： TN929
- 纸质出版日期：2023-08-10，
  
  收稿日期：2023-05-04，
  
  修回日期：2023-05-16，
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韩笑天，廖佩璇，李鹏，等.蒙特卡洛法仿真激光在水下信道中的传输特性[J].光通信研究，2023(4):53-59.

Han X T, Liao P X, Li P, et al. Monte Carlo Simulation on Laser Transmission Characteristics in an Underwater Channel [J].Study on Optical Communications, 2023(4):53-59.
韩笑天，廖佩璇，李鹏，等.蒙特卡洛法仿真激光在水下信道中的传输特性[J].光通信研究，2023(4):53-59. DOI： 10.13756/j.gtxyj.2023.04.009.

Han X T, Liao P X, Li P, et al. Monte Carlo Simulation on Laser Transmission Characteristics in an Underwater Channel [J].Study on Optical Communications, 2023(4):53-59. DOI： 10.13756/j.gtxyj.2023.04.009.

摘要

针对海洋港湾海水强吸收和高散射的特性，文章利用蒙特卡洛方法仿真研究了激光在浑浊港湾海水中的传输特性。文章在一定的光波长、光能量和发散角下，量化分析了水质参数和传输距离对激光的功率、脉冲响应以及光斑质量的影响。研究结果表明，激光在浑浊港湾海水中传输时，随着衰减长度的增加，光功率的衰减特性保持一致，且光功率的衰减速度不符合比尔定律所描述的线性关系。在相同的水质条件下，光脉冲的宽度和光斑的尺寸随着传输距离的增加而增大，但是当传输距离从20个衰减长度传输至30个衰减长度时，光脉冲宽度基本不变，光脉冲展宽量的变化小于1 ns，此时光斑尺寸持续增大。另外，在相同的衰减长度处，光脉冲和光斑的展宽量随着水质衰减系数的增大而减小。

Abstract

The transmission characteristics of laser in four types of harbor water were studied using Monte Carlo method simulations for the characteristics of strong absorption and high scattering of water in marine harbors. The effects of water quality parameters and transmission distance on the optical signal power

impulse response and spot quality were quantified and analyzed at certain optical wavelengths

optical energies and divergence angles. The analysis shows that the attenuation characteristics of laser remain consistent as the attenuation length increases when the optical signal is transmitted in the four types of harbor waters. The rate of attenuation of the optical power also does not conform to the linear relationship described by Beer's law. Under the same water quality conditions

the width of the optical pulse

the size of the light spot increases with the attenuation length. However

when the attenuation length is transmitted from 20 to 30

the width of the optical pulse is almost unchanged

and the change in the amount of light pulse spreading is less than 1 ns with the size of the light spot increases continuously. In addition

at the same attenuation length

the light pulse and the spreading amount of light spot with the water quality attenuation coefficient increases and decreases.

关键词

水下无线光传输蓝绿光蒙特卡洛脉冲响应光斑变化

Keywords

underwater wireless optical transmissionbule-green lightMonto Carloimpulse responselight spot change

references

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