Transcription of 波長多重の詳細 - soumu.go.jp
1 1 2 (1) CWDM Coarse Wavelength Division Multiplexing (2) DWDM Dense Wavelength Division Multiplexing ITU-T 1 1 CWDM CWDM (2) DWDM DWDM 1 CWDM DWDM DWDM [THz] 100 GHz CWDM 20nm 1300 14001500 1600 (nm) 2nm CWD DWD (nm) (2 CWD DWD (nm) DWDM CWDM ITU-T (1))
2 DWDM f +=f [THz] ( n f +=f [THz] ( n f +=f [THz] ( n f +=f [THz] ( n 103 =fc [nm] f [THz] [THz]=[1210Hz] c[m/s] (= 108) 200 GHz ITU-T 1 DWDM 1 ITU-T 100GH 200GH 100GH 200GH [nm] [THz] [nm] [THz] (2) CWDM CWDM 2 (ITU-T ) 2 ITU-T [nm] [nm] [nm] (1530) (1531) ( )))))
3 1550 1551 1570 1571 1590 1591 1610 1611 CWDM 2 CWDM (1370 1430nm ) 2 CWDM (dB/km)OLCS (nm) (dB/km)OLCS (nm) 2 FTTH EDFA Erbium Doped Fiber Amplifier C L 1290 1310 1330 1350 1370 1390 1410 1430 1450 1470 1490 1510 1530 1550 1570 15901610 EDFAPDFATDFAnm EDFA 3 (EDFA C L EDFA 4 (EDFA))
4 AGC Automatic Gain Control 2 2 2 1 3dB 1 2 1520 1530 1540 1550 1560 1570 1580 1590 [dB] [dB] [nm] (1) ff / 1 / 2 f1f2 1 / 2 / fff1f2 1 2 1 2 1 2 1 2 1 2 5 (2) (Raman crosstalk) 100nm [ ] 13 THz 6 ( )
5 Ff / 1 / 2 f1f2 1 / 2 / fff1f2 1 2 1 2 1 2 1 2 1 2 7 ( ) CNR CNR C N N C CNBCNBCNNC N 3dB CNB+N C N N C CNBCNN CNR C N CNB+N 8 CN CN CN 2 11++ =iiiibeatcf Hz ( ) c= 108 [m/s].
6 ( ) RIN ( m N 30 ) RIN 140dB/Hz GHzfbeat25 ( ) DWDM 100 GHz -150-140-130-120-110-100-900 5 10 15 20 25 Offset Frequency [GHz]RIN [dB/Hz] 40 30 9 RIN
