• The asymmetric system could be of interest – Filtering at the node allows ONU to stay the same – Downstream of 25G could be sub-channelized 100/25G, Option 1 1260 1270 1280 1290 1300 1310 1320 1330 1340 1350 1360 10nm A B C D 25G- EPON up 10G-EPON up 1480 1490 1500 1510 1520 1530 1540 1550 1560 1570 1580 1590 1600 1610 100 GE 1480 1481 1482 1483 1484 1485 1486 A B C D 1620 Coexists with 10G-EPON, RFoG, RF Video and NG-PON2 RFoG RF Video NG2 up 10- GE NG2 dn RFoG 100/25G, Option 2 1260 1270 1280 1290 1300 1310 1320 1330 1340 1350 1360 10nm DCBA 25GE PON up 10G-EPON up 1G-EPON (DFB) up 1480 1490 1500 1510 1520 1530 1540 1550 1560 1570 1580 1590 1600 1610 1608 1609 1610 1601 1602 1603 DCBA 1620 100 GE Coexists with 1G-EPON (DFB), 10G-EPON, RF Video, and TWDM 1G-EPON dn RFoG RF Video NG2 up 10- GE NG2 dn Alternative 4 channel CWDM upstream plan • If the main application of 100G system is to support 4 colors of 25G ONUs, then a CWDM plan could be lowest cost • There is no room for four 20nm bands, so we • There is no room for four 20nm bands, so we must squeeze every parameter – Temperature range: -40 to +85 = 12.5nm – Manufacturing range: 3.5nm – Guardband / passband: 25% – Passband: 16nm, Guardband: 4nm 100G four CWDM channel 1260 1270 1280 1290 1300 1310 1320 1330 1340 1350 1360 10nm 1 2 3 4 25G-E Ch 2 400 GHz 25G-E Ch 1 25G-E Ch 3 25G-E Ch 4 10G-EPON up 1480 1490 1500 1510 1520 1530 1540 1550 1560 1570 1580 1590 1600 1610 25 GE 1490 1492 1494 1496 1498 1500 1 2 3 4 1620 Coexists with 10G-EPON, RFoG, RF Video, 25G-EPON, and NG-PON2 100 GE 400 GHz spacing RFoG RF Video NG2 up 10- GE NG2 dn RFoG