复杂水质条件下蓝绿激光通信传输特性研究  

Analysis of transmission characteristics of blue-green laser under complex water condition

作　　者：任彦儒 宗思光[1] 梁善永[1] 李斌[1] REN Yan-ru;ZONG Si-guang;LIANG Shan-yong;LI Bin(School of Electronic Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033

出　　处：《激光与红外》2023年第3期355-361,共7页Laser & Infrared

基　　金：国防基研加强课题项目(No.2020-JCJQ-ZD-099-00-02)资助。

摘　　要：由于水下通信信道的复杂性,水下激光通信面临功率衰减和通信距离受限的问题。论文采用蒙特卡洛方法建立了水下高斯光束传输仿真模型,基于该模型重点研究了海水类型、衰减系数、传输距离、接收孔径对接收光功率衰减的影响规律。结果表明:在纯净海水、远海海水、沿岸海水和港口海水中,随着海水浑浊程度的增加,仿真得到的有效传输距离减少,光功率衰减增加;在文中设定的海水衰减系数下,当海水的吸收系数大于散射系数时,有效传输距离减少,光功率衰减增加;当接收孔径小于光束直径时,接收光功率随接收孔径的增加而增加,当接收孔径大于光束直径时,接收光功率不再随接收孔径的增加而变化。Due to the complexity of underwater communication channel,underwater laser communication faces problems of power attenuation and communication distance limitation.In this paper,a simulation model of underwater Gaussian beam transmission using Monte Carlo method is established.The influence of seawater type,attenuation coefficient,transmission distance and receiving aperture on the attenuation of received optical power is studied emphatically based on this model.The results show that the effective transmission distance obtained from the simulation decreases and optical power attenuation increases with the increase of turbidity degree in pure sea water,open seawater,coastal seawater and harbor seawater.With the seawater attenuation coefficient set in the text,when the absorption coefficient of seawater is greater than the scattering coefficient,the effective transmission distance decreases and the optical power attenuation increases.When the receiving aperture is smaller than the beam diameter,the received optical power increases with the increase of the receiving aperture;when the receiving aperture is larger than the beam diameter,the received optical power no longer varies with the increase of the receiving aperture.

关 键 词：水下激光通信 蒙特卡洛模型 复杂水质 衰减系数 接收孔径 

分 类 号：TN929.1[电子电信—通信与信息系统]