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毕 业 设 计（论 文）

题 目 用于波分复用的全光纤通信技术

姓 名

所在学院 电子与电气学院 专业班级 计算机通信二班 学 号 指导教师 日 期

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摘 要

近年来，通信行业发展迅速，大量的通信新业务不断涌现，信息高速公路正在全球范

围内以惊人的速度发展建立起来。所有这些应用都对大容量通信提出了越来越高的要求，使得光纤通信技术向着速度高、容量大、可伸缩性好的方向发展。

波分复用(WDM)系统的发展正是适应了这一时代潮流。应用这种技术可以在同一根光纤上传输多路信道，从而使通信容量成倍的扩大。不过，随着掺铒放大器(EDFA)在系统中的大量使用，也会带来一系列相关问题，如：色散、增益失衡、非线性效应等等。在建立一个WDM光纤通信系统的时候，必须很好地解决这些问题。在本文中，将讨论这些WDM系统的关键技术，并给出一个WDM光纤通信系统的总体设计。主要工作如下：

1．在对国内外WDM系统理论和实验研究进展进行广泛研究的基础上，重点讨论实现WDM

系统的关键技术和如何克服色散、增益失衡和非线性等影响性能的因素。 2．基于国际电联的ITU-T系列参考标准和信息产业部的相关标准，进行32×10 Gbit／s480km的WDM光纤通信系统总体设计和规划。给出系统的详细参数并对系统性能进行相关计算，讨论优化系统的技术和手段。

关键词:WDM 光纤通信 传输系统 大容量系统

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Abstract

Recently communication industry develop very fast,a large new communication services appered,the world is now building Cyber-high way. All these bring the need for larger and larger communication capacity,which stimulate fiber communication system develop towards adaptive,high speed,large capacity data transmission.

Wavelength division multiplexing (WDM) system developed following the trend. The system can greatly increase the transmission capacity by increasing th channels in a single fiber. But multi-wavelength transmission and thd employment of Erbiumdoped Droped Fiber Amplifier (EDFA) will cause a number of new problems,such as chromatic dispersion,gain fluctuation,fluctuation and non-linear effects etc. Ths problems should be solved in building WDM fiber transmission system. In this paper,the key technologeis in WDM system are discussed. The main parts in this project are as follows:

1.Based on the widely studing of references,the development on the theory and experiments of WDM system is reviewed. The degradation of the performance of the system,which is caused by chromatic dispersion,gain fluctuation and fluctuation and non-linear effects in fiber,is analysed and some scenarios are suggested to solve them.

2.Based on the revelant standards of ITU-T and related references,is designed. The general scheme of 32 X 10Gbit/s 480km WDM transmission system are designed for the most systems which fiber are model G.652. The parameters of the system are defined,and the performance is calculated.

Key words: WDM； Optical fiber communication； Transmission system； Large capacity

system；