光纤交叉相位调制幻灯片.ppt

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. 光纤通信系统正在向宽带、大容量的方向发展。密集波分复用技术作为目前干线光纤通信应用的最广泛的方式，也得到了长足的发展。;With 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. 入纤功率的增加和信道间隔的减小都导致了以前通常被忽略的非线性效应凸现出来，并成为光纤通信容量进一步增长的限制。;This 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复用系统中的一种重要的非线性效应——交叉相位调制对系统性能的影响及减小其影响的方法，并研究基于光纤中交叉相位调制的波长转换器。;First the commonly 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).本文首先介绍了光纤通信系统的仿真算法――分步傅立叶方法及其改进形式，并介绍了本文中主要使用的仿真平台：VPI 公司的 VPITransmissionmaker（原名 PTDS，Photonic Transmission Design Suite）。;Then the optimal design of a single 40Gbps system and the influence of the dispersion compensation on systems are given. 在第二章研究了单信道 40Gbps光纤通信系统的优化设计方案及色散补偿方案对系统性能的影响。;Although XPM can cause system performance degradation, it finds significant applications in all-optical high speed signal processing, since its response time is very short. 尽管交叉相位调制对系统性能有较大影响，由于其非线性效应的瞬态响应特性，在高??率全光信号处理方面它却有其独特的用处。;A 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 s