DWDM原理

1DWDM2nDWDMnDWDMnDWDMn3DWDM4n–n–n–CPU18–9–6540%10%199820002008n6n–SDM(SpaceDivisionMultiplexer)–TDM(TimeDivisionMultiplexer)–WDM(WavelengthDivisionMultiplexer)–TDMWDM7nWDM–WavelengthDivisionMultiplexing–Txl1TxlnEDFARxl1RxlnEDFAEDFA8DWDMn––EDFA––––,,,9DWDMn–,–––101606481(TDM)2.5Gb/s10Gb/s40Gb/s20Gb/s80Gb/s320Gb/s160Gb/s640Gb/s2.56Tb/s400Gb/s1.6Tb/s6.4Tb/sWDMTDMWDM11WDMSDHWDMATMIPIPDXCADMOADMWDMOXCATM12nWDMSDH–SDHTDMWDMWDM–WDMSDHSDHWDM13DWDM1415l1l2DlDWDMn–ITU-T–≤±Δλ/5ITU-T≤±Δλ/10n–@-20dB0.2nmnnn16196.0199.0195.0194.0193.0192.0191.015051510153015351540154515501555156015651570OSC1510±10nmC-BandL-Band(THz)l(nm)()£±n/5nn–193.1THz1552.52nm)100GHz(0.8nm)17ll1l21-XdBll1l21-XdBMLMSLMLEDl1l2l1-XdB18nnFPDFB19n–T(°C)l(nm)TECTECl020TECTECl0l0-Dl±DVl0+Dll0l0+Dll0-DllV0DVn21O-EE-ODFBOTUTranspondernO/E/O–40Gbit/s––SNR–22n–––•–23PINAPDn24nForwordErrorCorrecting)–••––25(FEC)nFEC–––WDM––––2627nDWDMITU-TG.671–•–•-0.5dB-20dB28n–––––29n----30n–WWDM–DWDM•8:131nλλλλl1/2l1/4l1/4l132SMFSMFLensLensLensLensLens17538624LensLensLensLensMicroPlasmaä(8)8/33n––34n–––––––35nAWGl1,l2,…..lnl1ln.3637l38DWDM39nO-BandOriginal1260to1360nm2nE-BandExtended1360to1460nm5nS-BandShortwavelength1460to1530nm5nC-BandConventional1530to1565nm3nL-BandLongwavelength1565to1625nm4nU-BandUltra-longwavelength1625to1675nm-G.dsn”Opticalsystemdesignandengineeringconsiderations”40~n–41nA=10lg(Pout/Pin)/L(dB/km)n–(SiO2)–OH-n–(Rayleigh)A=C/λ4––n–•42(dB)10.05.02.01.00.51982198019780.81.01.31.51.7(μm)43----n––n44tPMD----n(PMD)4525km18km3.6km40Gbit/s100km70km14.5km20Gbit/s400km283km58km10Gbit/s6400km4528km928km2.5Gbit/s1310nm(G.652)1550nm(G.655)1550nm(G.652)n()()n,46n––n––––––47D1L1+D2L2=0n–(–100ps/nm.km)–120km1720kmDCF–n–(0.5-1dB/km),EDFA–(DCF:20um2G-652:80um2)3-6dBm–48n–•DCF–•49λ1λ2λ3λN-2λN-BAPABAPAOSCT/ROSCOSCT/RWDMWDMPDCPDCPDCPDCPDCPDCλ1λ2λ3λN-2λN-λ1λ2λ3λN-2λN-λ1λ2λ3λN-2λN-50n–n51n–n----Kerr–n=n0N2In0+N2P/Aeffn–(SPM)–(CPMXPM)–(FWMFPM)52(FWM)(10dB/div)1546.5(1nm/div)(1nm/div)G65325kmD=0ps/(nm*km)G65550kmD=2.5ps/(nm*km)(10dB/div)1546.52nm1nm1.5nm2nm1nm1.5nm=3dBm/FWM53n–-----–-----–-----n–------–------54(SPM)(XPM)(FWM)(SBS)(SRS)55–10mw,2.5Gb/s–WDMSPM–SNRSPMSNRSPMQP56n–G651–G652(NDSF)–G653(DSF)–G654–G655(NZ-DSF)571550nm1310nmps/nmkm(SMF)NDSFG.65295%lDSF,G.653NZDSF,G.655180DWDM58G.652n–––G.652+DCFnG.652CAllwave–OH–G.652100nm–n:G.6522.5Gb/sDWDM59G.653n1550nmn:––EDFA–DWDMn:10Gb/sDWDM60G.655nn:––15301565nm–SPM–DWDM,61G.655n–truewaveNZDSF–(truewaveXLLEAF)–(truewaveRS)–LEAFn:10Gb/sDWDM+EDFA62nn–-–n–63n–•1550•1310–•SRS0.5--1W•SBSMHz)–••64EDFAEr3+l=980nm1480nm1535~1560nm65EDFAn––––––n––SNRSNR)66~~EDFAn(Al-EDF)(nm)(dB)(dB)(nm)(dB)=n67EDFAnEDFABAPALA68n–s=iv(i,v,s)–is=iv–––69nSRS–13THz(100nm)–1450nm70nEDFAStage1RamanpumpEDFAStagekRamanpump7172DWDMn–––1310nm––OSC3R–OSC73DCCoDCCoDCNE1DWDM74DWDMn–1510nm–EDFAEDFA–2Mb/sn–1532nm–EDFAEDFA–155Mb/s75EMn––––4nDWDM“”76FONSTDWDMFONSTDWDMGF2488GF2488--01B01BGF2488GF2488--01B01BGF2488GF2488--01B01BFONSTSDHFONSTSDHGF2488GF2488--01B01BGF2488GF2488--01B01BGF2488GF2488--01B01BFONSTSDHFONSTSDHGF2488GF2488--01B01BGF2488GF2488--01B01BGF2488GF2488--01B01BFONSTSDHFONSTSDHSEMSSEMSDEMSDEMS77FONSTDWDMFONSTDWDMGF2488GF2488--01B01BGF2488GF2488--01B01BGF2488GF2488--01B01BFONSTSDHFONSTSDHGF2488GF2488--01B01BGF2488GF2488--01B01BGF2488GF2488--01B01BFONSTSDHFONSTSDHGF2488GF2488--01B01BGF2488GF2488--01B01BGF2488GF2488--01B01BFONSTSDHFONSTSDHEMSEMS78DWDM79DWDMn–1996–n–160Tb/s–1022nTb/s–1.6Tb/s16010Gb/s80DWDMn160Gb/sn20GHznCLSnkmn3600kmnn81DWDMnTera-b/s–3.2Tb/s–:–,transponder–WDM–82WDMnCWDM–DWDMDWDM–——83WDMnDWDMnCWDM–1–2–3n8485––/86/n/–––OADM/OXC,OTN87OADM(OpticalAdd-DropMultiplexer)n–DropAdd–OADMDWDM88OADMnl1l2…lnl1l2…lnl2ln89OXC(OpticalCross-Connect)n–•–•n–90OXC–l1l2…lnl1l2…lnl1l2…lnl1l2…lnl1l1l1l1lnlnlnln91*DWDM***OADM**OXC*OADMOADMOADMIPATMSDHIPoxcOADMOADMOADMOADMOADMWDMWDMl1lnl1ln--WDM-WDMWDM92(OTN)IPSDHPDHATMn93IP/SDH/DWDMAPSTNPSTNADSLADSLBLANLANCLANLAN……PSTNATMATMATMATMLANLANLANLANOXCOXCOADMOADMATMSwitchATMSwitchUASUASCRCRERERSwitchSwitchSDHSDH94