1、The fiber-optic systems are developing into wide-band fiber-optic communication systems with huge capacity. As the most widely used method in the backbone communication networks, dense wavelength division multiplexing (DWDM) technology has made remarkable progress. 光纖通信系統(tǒng)正在向?qū)拵А⒋笕萘康姆较虬l(fā)展。密集波分復(fù)用技術(shù)作為目前干

2、線光纖通信應(yīng)用的最廣泛的方式，也得到了長足的發(fā)展。1With the increase of the input power and the reduction of the channel separation, nonlinear effects, which has been ignored in the low-bit rate linear systems, has distinguished itself and can not be neglected any more. 入纖功率的增加和信道間隔的減小都導(dǎo)致了以前通常被忽略的非線性效應(yīng)凸現(xiàn)出來，并成為光纖通信容量進一步增長的限制

3、。2This work mainly studies the influence of cross phase modulation (XPM) on DWDM systems and schemes to suppress the influence. In addition, all-optical wavelength converter based on XPM in optical fiber is studied. 本文主要研究密集波分復(fù)用系統(tǒng)中的一種重要的非線性效應(yīng)交叉相位調(diào)制對系統(tǒng)性能的影響及減小其影響的方法，并研究基于光纖中交叉相位調(diào)制的波長轉(zhuǎn)換器。3First the co

4、mmonly used algorithms Split-step Fourier Method and its enhancement are introduced, as well as the simulation platform mainly used in this work VPITransmissionmaker by VPI (With its former name PTDS, Photonic Transmission Design Suite).本文首先介紹了光纖通信系統(tǒng)的仿真算法分步傅立葉方法及其改進形式，并介紹了本文中主要使用的仿真平臺：VPI 公司的 VPITra

5、nsmissionmaker（原名 PTDS，Photonic Transmission Design Suite）。4Then the optimal design of a single 40Gbps system and the influence of the dispersion compensation on systems are given. 在第二章研究了單信道 40Gbps光纖通信系統(tǒng)的優(yōu)化設(shè)計方案及色散補償方案對系統(tǒng)性能的影響。5Although XPM can cause system performance degradation, it finds signific

6、ant applications in all-optical high speed signal processing, since its response time is very short. 盡管交叉相位調(diào)制對系統(tǒng)性能有較大影響，由于其非線性效應(yīng)的瞬態(tài)響應(yīng)特性，在高速率全光信號處理方面它卻有其獨特的用處。6A kind of wavelength converter based on XPM in dispersion shifted fiber(DSF) is studied in chapter 4, where the critical parameters and their influence on the performance of the wavelength converter are studied. 本文第四章研究了基于色散位移光纖中交叉相位調(diào)制效應(yīng)的波長轉(zhuǎn)換器，得到了這種波長轉(zhuǎn)換器的一些關(guān)鍵參數(shù)及這些參數(shù)對波長轉(zhuǎn)換器性能的影響。 7Key words ： Dense Wavelength Division Multipl