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

s=17 (ps/nm.km),=1550nm,: B2L

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

* * ****