数字光纤传输系统课程设计报告书

课程设计

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电子与信息工程学院

通信工程系

THE DIGITAL OPTICAL FIBER TRANSMISSION SYSTEM------------------------------- 3 1. 引言--------------------------------------------------------------------- 4

1.1 设计背景-------------------------------------------------------------- 4

1.2 光纤通信技术---------------------------------------------------------- 4 1.

2.1 光纤通信概念-------------------------------------------------------- 4 1.2.2 光纤通信发展-------------------------------------------------------- 4

1.3 数字光纤传输的优点---------------------------------------------------- 5

1.4 光纤通信技术的发展前景 ------------------------------------------------ 6

2.数字光纤传输系统设计------------------------------------------------------ 7

2.1数字光纤传输的两种体制------------------------------------------------- 7 2.1.1准同步数字系列PDH--------------------------------------------------- 8 2.1.2准同步数字系列SDH--------------------------------------------------- 8

2.2 整体设计------------------------------------------------------------- 10

2.3 光发射机------------------------------------------------------------- 11 2.

3.1 光源--------------------------------------------------------------- 11 2.3.2 调制电路和控制电路------------------------------------------------- 11 2.3.3 线路编码电路------------------------------------------------------- 12

2.4 光接收机------------------------------------------------------------- 13 2.4.1 光检测器----------------------------------------------------------- 13 2.4.2 放大器------------------------------------------------------------- 14 2.4.3 均衡和再生--------------------------------------------------------- 14

3.数字光纤传输系统分析----------------------------------------------------- 14

3.1性能指标-------------------------------------------------------------- 14

3.2系统设计分析---------------------------------------------------------- 15 3.2.1中继距离受损耗的限制 ----------------------------------------------- 15 3.2.2中继距离受色散(带宽)的限制 ----------------------------------------- 16

4．总结-------------------------------------------------------------------- 16

随着数字技术和光纤通信技术各自的进步，以及社会对于光纤集成网络以实现资源共享的要求日益增长，数据与光纤通信技术也已紧密地结合起来，成为了社会的强大物质技术基础。现代社会，数字光纤通信已经越来越多地应用到了社会各个领域中。

光纤通信系统最重要的部分是光发射机、信道和光接受机三个模块。通过各种光电设备连接成SDH 同步数字序列的数字光纤传输系统，最后在分析指标与设计性能方面验证了系统的合理性。

关键词：光纤通信技术、数字光纤传输系统、SDH同步数字序列、性能指标

The digital optical fiber transmission system Abstract:

With the development of digital technology and optical fiber communication technology and their progress, and the society for optical integrated network to realize resource sharing requirements increasing, data and optical fiber communication technology has been closely combined, become society's powerful corporeal technology base. In modern society, digital optical fiber communication has been increasingly applied to all areas of society.

Optical fiber communication system is the most important part of the optical transmitter, channel and optical receiver module three. Through a variety of optoelectronic devices connected to SDH synchronous digital series digital optical fiber transmission system, in the final analysis indexes and design performance with respect to verify the rationality of the system.

Key words: optical fiber communication technology, digital optical fiber transmission system, SDH synchronous digital sequence, performance index