光纤传输特性对光网络的影响-电磁场与微波技术专业论文.docxVIP

摘 摘 要 在软件平台上进行光网络研究具有灵活、方便和高效等优点。因此，光传送 网的模拟软件逐步成为研究波分复用光网络的重要工具。本人在WDM全光网信 息模型和管理系统的项目研究中，主要从事光纤传输特性方面的研究和建模开 发。本文对此方面的工作进行了介绍。 文章首先概述了光纤传输的各种特性：衰减、色散、以及各种非线性效应。 在建模过程中主要考虑的重点是衰减、群速度色散、自相位调制(SPM)、交 叉相位调制(XPM)、四波混频(FWM)和受激喇曼散射(SRS)。然后介绍 了光纤的分类。 接下来，文章详细说明了光纤传输数学模型的建立。文中提出了一种WDM 传输系统中光纤非线性效应的综合表达式，并且提出了相应的算法——扩展的分 步傅立叶算法，通过分析和模拟表明，该综合表达式及其相应的算法有利于 WDM传输系统性能的模拟和规划设计。 然后文章介绍了实验室自主开发的光网络模拟仿真软件。 最后运用模拟软件对光纤各种效应对光纤通信系统的影响进行了计算、仿 真、分析，并与实际系统的测试结果进行了比照。 关键词：波分复用，全光网，分布傅立叶算法，光纤非线性。 ABSTRACTOptical ABSTRACT Optical networks researching with software is convenient and efficient。 Therefore．optical networks simulation software becomes an important tool jn WDM network research．The author studied optical fiber transmission effects and modeling of them in the project of WDM All—Optical Network information modeI and network management．The above works are Intmduced in this paper． Firstly，the effects of fiber optic transmission are discussed，such as attenuation，dispersion+and fiber nonlinear effects．1n the fiber modeling，we mainly take the attenuation，GVD(Group Velocity Dispersion)，SPM (Self-Phase Modulation)，XPM(CROSS-phase modulation)，FvvM(Four-Wave Mixing)and SRS(Stimulated Raman Scattering)into account．And different kinds of fiber are introduced． Secondly,how the modeling of optical fiber transmission founded is discussed in this papen A synthetic equation set about optical fiber nonlinear in WDM tiansmission system is proposed。A supplementary split-Step FOurier Method to solve the equation iS proposed too．The equation and its numerical method can be used to analyze different fiber nonlinear effects。which wilf also do great help to simulating and analyzing the performance of WDM transmission system． In addition，simulation software of optical network developed by ourselves is introduced in this paper． Finally，the effects of fiber transmission on the fiber communication system are simulated using the software．And these results are compared with the testing results of an actuaI syst