厦pulse laser, and according to the characteristics of pulse laser output, we have carried
on the related design research on the processing of emission signal by "return zero" and the amplification plastic processing of the received signal.
要 underwater application range of communication technology. The research object is the
relevant technology of underwater wireless optical communication system and the
related measurement and analysis of the underwater transmission experiment by this
门 system. Based on this, we have designed another scheme which based on a high power
摘 design of transmit/receive system. Firstly this paper described the current research status at home and abroad
文 in-depth knowledge, secondly has carried on the theoretical overview of the
Key Words: underwater wireless optical communication; blue/green laser; AMBE; RZ; acousto optically Q-switched
III
目录
摘 要 .......................................................................................................................................... I 第 1 章 绪论 ............................................................................................................................ 1
1.3.1 国外水下无线光通信现状 ............................................................................ 3
摘 1.3.2 国内水下无线光通信现状 ............................................................................ 8 文 1.4 本课题研究目标........................................................................................................ 10
light module with a modulation way of TLL as transmitter, AMBE-1000 for low rate
学 speech coding, STC89C52 for microcomputer processing, high-speed photoelectric
士 has proceed the experimental study for voice transmission. 硕 In the design of underwater wireless optical communication system, we have put 博 forward a set of system design scheme based on continuous laser, which used a blue
文 比了当前较常见的几种水下通信方法，分析了水下无线光通信的几项较关键的技
论 术，最后完成了系统的相关设计，并对应用于语音传输的通信系统进行了实验。 在水下无线光通信系统设计中，提出了一套基于连续激光器的系统设计方
士 案，采用的是连续蓝光模组 TTL 调制发射的方式，AMBE-1000 低速率语音编码，
1.1 引言 ................................................................................................................................ 1
库 1.2 研究背景 ....................................................................................................................... 1 要 1.3 国内外研究现状.......................................................................................................... 2
库 要 摘 文 论 士 硕 博 学 大 门 厦
库 要 摘 文 论 士 硕 博 学 大 门 厦
库 要 摘 文 论 士 硕 博 学 大 门 厦
摘要
随着海洋探测、水下观察、潜艇对潜通信等水下应用领域对通信技术的需求
和要求不断提高，构建高数，水下无线光通信技术以其具有极高的信息承载能力和传输速率等优势，吸
underwater wireless optical communication system, introduced the blue/green laser
论 channel characteristic under water, compared the current commonly used method of
库 information capacity and transmission rate, attracted many research organizations and
researchers. This project is just under the background of increasing demand for the
detector for receiving and converting the signal, and realized the voice signal transfer
大 through the recovery process of the received signal, and then, we have done the
1.5 研究的主要内容........................................................................................................ 10
论 第 2 章 水下无线通信系统概述................................................................................ 12 2.1 引言 .............................................................................................................................. 12 士 2.2 蓝绿激光海水信道特性 .......................................................................................... 12 硕 2.2.1 海水的光吸收 ................................................................................................. 12 博 2.2.2 海水的光散射 ................................................................................................. 13 学 2.2.3 海水中的激光传输特性............................................................................... 14 2.3 现行的几类水下无线通信方法 ............................................................................ 15 大 2.3.1 水声通信 .......................................................................................................... 15 门2.3.2 低频无线电波通信 ........................................................................................ 16 2.3.3 水下电磁耦合无线通信............................................................................... 16