NameFrequency (nano meters)OtherDWDMCWDM
O-Band1260 – 1360nm~1310 "grey" LX, LH, LR, etc



CWDM band
E-Band 1360 – 1460nm

S-Band 1460 – 1530nm

C-Band 1530 – 1565nm~1550 "baseband" ZX, ZR, etcDWDM band
L-Band 1565 – 1625nm
Extended DWDM band
U-Band 1625 – 1675nm



The following diagrams are from: https://www.thefoa.org/







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