Post on 14-Jan-2016
description
9 9.1 9.2 9.3 9.3 9.4
//
9.1
1
/ 1.31m1.55m
LDLED LDLED(800~900nm)(GaAlAs)LDLED(1000~1600nm)(InGaAsP)LED
()
LD LDLED
LD
LD
LD 0
LDLD
M-Z
M-Z
A/2B-/2AB
20 GHz
nEn = nE LiNbO3
yxyxzL
yxyxP1P2LV
yxyxP1P2L-V
(EAM, Electro Absoption Modulator)p-i-n i p-i-n i 0 i 1
(EAM, Electro Absoption Modulator)p-i-n i MQW i p-i-n i 0 i 1
p-i-n i MQW i
dBm P=10 lg [ P(mW) / 1(mW)] 1mW
(mW)10010210.50.10.010.001(dBm)+20+10+30-3-10-20-30
10Gb/s(DCF)(DCG)
2
PINAPD Si-APD Ge-APD InGaAsP-APDPIN/
AGC:
PINAPDPIN(FET)PIN/FETAPD/FET
AGC:
AGC
AGC:
1 1 0 1 0 1
3
3R re-amplifying re-timing re-shaping
3R copy 3R
3R
(O-E-O)WDM1R2R3RO-O-O1R
EDFAPDFASOAFRAFBA
EDFA1550nm(Er)(EDFA-Er-Doped Fiber Amplifier)1300nm(Pr)(PDFA)1400nm(Tm)(TDFA)EDFA
(1525-1565nm)-/(>40dB)(~30dBm)(4~5dB)()
EDFAEr3+5206508009801480nm980nm9801480nm980nm1480nm1550nm
EDFAEr3+E2E1E2E1
EDFA()
EDFA()()3dB
EDFA EDFAEDFA
PCM//
3675120246011110111101001010367512TPCMT8
1 0 1 0 1 1AGC
APD
Pmax= -5 dBmPr= -43 dBm =0.4 dB/kmM=6dBAC=0.5dB s= 0.025dB/km
=Pt-Pr= -5 (-43) = 38dBm (+) = (0.4dB+0.025dB) L = 1dB ( 2, 0.5 dB) = 6dB = (0.425L+1+6)dB= (38-1-6)/0.425=72.9 km ()
BBLBL
9.2
(WDMWavelength Division Multiplexing) ( FDMFrequence Division Multiplexing ) (OTDMOptical Time Division Multiplexing) (OCDM Optical Code Division Multiplexing)
-----Wavelength Division Multiplexing)
WDMN 123EDFAMUXDEMUX1N 32
N 123EDFA1N 32 1 2 3 N1 2 3 N
WDM1530~1562nmC-band)
WDMCWDM()DWDM()CWDM20nmDWDM0.2nm 1.2nmDWDMCWDM
WDM
0.1nm(10GHz) OFDM)
(OTDMOptical Time Division Multiplexing)
IIIIII
Optical Switch
Optical Switch
(MEMSMicro-Electro-Michanical Systems)DWDM
(Micro-Mirror)140m150m
1N MEMS Switch
MEMS
88 MEMSInput Output
Free-Space Micromachined Optical Switch
MEMS 256256 10 /s10 G 2001 10241024 40Gb/s
-11
Y-11CDAB0
(OCDM Optical Code Division Multiplexing)
OCDM
9.3
( TDMTime Division Multiplexing) (WDMWavelength Division Multiplexing) (FDMFrequence Division Multiplexing ) ( SDMSpace Division Multiplexing)
(850nm)(1310nm1550nm)1550nm1525nm~1565nm8161.6nm0.8nm9.4
C1530 1562nm L1570 1604nm S1525nm1365nmLS45
1530~1565nmC-band)
1450 1490 1530 1570 1610 1650S+ S C L L+ (nm)
(nm)S1490-1530/S+1450-1490/C1530-1562L1570-1604L+1610-16501300-1650/
1966~1979 ()9.5 (GaAs) 0.8 m10 km 10~100 Mb/s
80 () (InGaAs) 1.3 m50 km2.0Gb/s ~0.5 dB/km
8090 () (InGaAsP) 1.55m () 2.5~10 Gb/s100 km
90 (WDM) (InGaAsP) 1.55 m2.5~10 Gb/s14000 km
42.5 Gb/s(10 Gb/s) 82.5 Gb/s(20 Gb/s) 162.5 Gb/s(40 Gb/s)402.5 Gb/s(100 Gb/s)3210 Gb/s(320 Gb/s)4010 Gb/s(400 Gb/s)
8240 Gb/s(3.28 Tb/s)3100 km=300 kmOptical Fiber Communication Conference Bell Labs: 8240 Gb/s=3.28 Tb/s3100 km=300 kmTrue Wave()(G.655)CL NEC: 16020 Gb/s=3.2 Tb/s 64 nm1500 km;
(Fujitsu): 12810.66 Gb/s CLC15251565 nmL15701620 nm (DRA: Distributed Raman Amplification), 6140 km=840 km; NTT 3042.7 Gb/s 50 nm3125 km376 km; Lucent Tech: 10010 Gb/s=1 Tb/s25 GHz, LNZDF(G.655)400 km; MciworldcomNortel: 10010 Gb/s=1 Tb/s NZDFCL4 200 km;
20061540Gb/s SDH40Gb/s SDHG.652G.655560 40GSDH50
9.6
NGN,Next Generation NetworkOTNIP "IPQoS=NGN"
CERNET2CNGI202.5~10Gbps45~155M180211110GCERNET2CNGI CNGI
CERNET2 Backbone
CERNET2200310CNGICERNET2CERNET22.5G 6000IPv620041CERNET2IPv62004319CERNET2
ION
(AON) ()
01
Soliton.
1~2km
WDMOCDMOTDMOFDM EDFA
* * ****