《先进光纤通信系统》PPT课件

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1、先进光纤通信系统张新亮Email:xlzhang@mail.hust.edu.cnMobile:13871262929课程简介（1）32学时/2学分；讲课为主，穿插讨论考试：开卷考试ContentsIntroductionKeytechnologiesinDWDMultra-longhaultransmissionsystemsKeytechnologiesinOTDMtransmissionsystemsKeytechnologiesinOCDMAandcoherentopticaltransmissionsystemsCoherentopticalcommunication

2、systemsNodetechnologiesinnextgenerationopticalnetworkReferences《Fiber-opticCommunicationSystems》6-11章顾畹仪，WDM超长距离光传输技术《Phase-modulatedcommunicationsystems》IntroductionReviewonfundamentalfiber-opticcommunicationsystemsFiberRelayerOpticalTransmitterOpticalReceiverElectricalTransmitterSubscriber

3、FiberElectricalReceiverSubscriberKeyfactorstobeconsideredinthreebasicpartsTransmitters:Outputpower,linewidth,modulationFiber:Loss,dispersion,nonlinearityReceiver:Bandwidth,noise,sensitivityFiberLossFiberDispersionFiberNonlinearity低速高速DWDM：多信道高速长距离BL积增大，容量提高工作窗口向长波长方向移动；制作无水光纤；使用EDFA；色散位移光纤；色

4、散补偿光纤；低PMD光纤；非零色散位移光纤；大有效面积光纤；色散平坦光纤；无水光纤；目前DWDM光纤通信系统中为什么要采用大有效面积非零色散位移光纤???homojunctionDoubleheterostructureStripegeometryMulti-quantum-well载流子限制作用加强，光子限制作用加强激光器阈值电流降低SampledGratingDBRLaserHighSMSR,largetuningrange,integratedwithSOA,powervariationsPN光电二极管PIN双异质结PINAPDSAM-APDSAGM-APD：Mf=70

5、GHzSAGCM-APD:：Mf=140GHzTrade-offbetweenRandfIntroductionofOAs———DWDMConventionalTransmission-10Gb/s1310RPTR1310RPTR1310RPTR1310RPTR1310RPTR1310RPTR1310RPTR1310RPTRTERMTERM40km40km40km40km40km40km40km40km40km1310RPTR1310RPTR1310RPTR1310RPTR1310RPTR1310RPTR1310RPTR1310RPTRTERMTERM1310RPTR131

6、0RPTR1310RPTR1310RPTR1310RPTR1310RPTR1310RPTR1310RPTRTERMTERM1310RPTR1310RPTR1310RPTR1310RPTR1310RPTR1310RPTR1310RPTR1310RPTRTERMTERM120kmOC-48OAOAOAOA120km120kmOpticalAmplifiersandWDM-10Gb/sOC-48OC-48OC-48OC-48OC-48OC-48OC-484fibers1fiber;12regenerators1opticalamplifierConfigurationofDWDMsy

7、stemsλ1λ3λ31310nm850nmMux/DeMuxOEOOEOOEOPumpPumpTransponder-BasedWDMSystemClientEquipmentEDFA光发射机光发射机光发射机光发射机N123光接收机光接收机光接收机光接收机N123EDFA功放线放预放MUXDEMUXKeyfactorstobeconsideredinDWDMsystemswavelengthlockingintransmittersNonlinearitiesinOptic