随着通信业务的飞速发展,市场对传输容量的需求也不断增加4OG核心 路由器的部署和应用以及新业务的带宽需求激增,驱动了40G技术在WDM中的应 用,未来几年内4OGWDM系统设备将取代现有的IOGWDM系统设备,就像前几年 10GWDM系统设备取代2.SGWDM系统设备一样然而,4OGbit/S信号对光纤 传输提出了更加严格的要求,面对40GWDM传输系统存在的集成电路设计难! OSNR!非线性!频谱!色散和偏振模色散等难题,文中详细介绍了40GWDM传 输的关键技术,通过对中国联通新建的一套40GWDM系统实验网进行理论分析 和仪表测试,明确论证了40GWDM传输网的可行性及其重大意义 关键词:波分复用色散光信噪比前向纠错非线性效应THEEXPERIMENTSNETWORKOF4OGWDMTRANSMISSION SYSTEMANDTHEFEASIBILITYSTUDY AB5TRACT 诚ththeraPiddeveloPmentofeommunieationserviees,themarketdemandfor transmissioncaPaeityhasbeeninereasing.ThedePloymentandaPPlicationof40G corerouters,andbandwidthrequirementsofnewbusinesssurged,drivingthe40G WDMaPPlicationinthenextfewyears,40GWDMsystemequiPmentwillrePlace theexistingIOGWDMsystemequiPment,asinPreviousyearsIOGWDMsystems equiPmenttorePlaeeequiPmentas2.5GWDMsystem.However,4OGbit/soPtical transmissionsignalmademorestringentrequirements,thefaceoftheexisting40G WDMtransmissionsystemICdesignjsdimcult,OSNR,nonlinear,frequency, disPersionandPolarizationmodedisPersionandotherProblems,thePaPerintroduces 40GWDMtransmissionofkeyteehnologies,thenewChinaUnicomthrougha4OG WDMsystem,thetheoretiealanalysisandexPerimentalnetworktestinstruments, cleariydemonstratedthefeasibilityof40GWDMtransmissionnetworkandits significance# KEYWORDS:WDMDisPersionOSNRFECNonlineareffects 为目录 第一章绪论.......................................................... 1WDM传输网的现状及存在问题.............................,..1 240GWDM传输发展的必要性.........................................1 3从10G到40G的思考..............................................3 44OGWDM传输系统研究的目标.......................................4 第二章40GWDM传输的关键技术.........................................6 2.1调制编码技术,!..................................................6 2.2色散补偿技术......................................................8 2.2.1色度色散(CD)补偿技术........................................8 2.2.2偏振模色散(PMD)补偿技术............-........................9 2.3前向纠错技术,!..............................!............H 2.4光放大技术.......................................................n 第三章40GWDM传输的网络规划........................................13 3.14OGWDM系统的网络组成..........................................13 3.1.1站点类型.....................................................13 3.1.2组网与保护...................................................巧 3.240GWDM系统的应用..............................................20 3.2.1实验网的设计..................................................20 3.2.2实验网的技术方案论证..........................................26 第四章40GWDM传输系统的测试........................................29 4.1项目测试方案.....................................................29 4.1.1主要测试内容.................................................29 4.1.2系统测试配置.................................................30 4.2项目测试方法和结果...............................................32 4.2.1设备单机测试方法及结果.......................................32 4.2.2WDM系统测试方法及结果..................................384.2.3网管测试方法及结果............. 4.2.4参考类项目测试方法和结果.............. ,45 ,47 4.3项目测试结论 第五章总结与展望.....................................................49