第 42 卷 第 8 期
2015 年 8 月
Vol. 42, No. 8
August, 2015
中 国 激 光
CHINESE JOURNAL OF LASERS
0805007-
Rapid Estimation of the Maximum Communication Distance for an
Underwater Laser Communication System
Hu Xiuhan
1,2
Hu Siqi
1,2
Zhou Tianhua
1*
He Yan
1
Zhu Xiaolei
1
Chen Weibiao
1
1
Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine
Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
Abstract A semi-analytical method of rapidly estimating the maximum communication distance of an underwater
laser communication system is proposed. For a given underwater optical channel, only two simulation times are
needed to obtain the maximum communication distance. Once the system conditions are changed, no more
simulations are needed. Two reference distances through simple mathematical operations based on the parameters
of underwater optical channel are initially deduced. Than a separate simulation is conducted for each reference
distance. Finally, an equation for calculating the maximum communication distance is deduced based on theoretical
analysis. The simulation results are compared with experimental ones and are found to coincide well with each
other. The validation of the semi-analytical method is proved.
Key words optical communications; underwater laser communication; semi- analytical method; maximum
communication distance; Monte Carlo method
OCIS codes 060.4510; 010.3310; 010.4450
水下激光通信系统最大通信距离的快速估计
胡秀寒
1,2
胡思奇
1,2
周田华
1
*
贺 岩
1
朱小磊
1
陈卫标
1
1
中国科学院上海光学精密机械研究所空间激光信息传输与探测技术重点实验室, 上海 201800
2
中国科学院大学, 北京 100049
摘要 为了快速评估水下激光通信系统的最大通信距离,提出了一种半解析的方法。对于给定的水下光学信道,仅
仅需要进行两次仿真就可以获得系统的最大通信距离。即使系统参数改变,也不再需要进行额外仿真。根据水下
光学信道参数,通过简单的数学运算获得了两个参考距离。并针对每个参考距离各进行了一次仿真。最后根据理
论分 析和 仿真 结果 ,推导 出了 最大 通信 距离的计算公式。为了验证该计算方法的有效性,将计算结果与实验结果
进行了对比。对比结果表明两者吻合得很好,故所提出的半解析方法的有效性得以证实。
关键词 光通信; 水下激光通信; 半解析方法; 最大通信距离; 蒙特卡罗法
中图分类号 TN929.1 文献标识码 A
doi: 10.3788/CJL201542.0805007
收稿日期: 2015-03-11; 收到修改稿日期: 2015-04-07
基金项目: 国家 863 计划(2014AA093301)、国家自然科学基金(61205214)
作者简介: 胡秀寒(1989—),男,博士研究生,主要从事蓝绿激光通信方面的研究。E-mail: huxiuhan@siom.ac.cn
导师简介: 朱小磊(1966—),男,研究员,博士生导师,主要从事全固态激光器技术方面的研究。E-mail: xlzhu@siom.ac.cn
*通信联系人。E-mail: gietzth@163.com
1 Introduction
Underwater optical communication is attracting increased attention because of its advantages of high speed, good
security, and low power consumption
[1- 3]
. Many successful applications have been reported
[4- 6]
, but some factors
hinder its extensive use, including absorption and scattering of water, energy loss of light, angular diffusion,
temporal spreading, and spatial dispersion during underwater propagation. Based on multiple scattering model, Wei
1