Published by: Research & Development Department, Technologie Optic Inc., June 2025
Coarse Wavelength Division Multiplexing (CWDM) is a technology used in fiber-optic networks to increase bandwidth by transmitting multiple signals on different wavelengths over a single fiber. CWDM typically uses 20 nm channel spacing and operates in the wavelength range of 1270 nm to 1610 nm. It is widely used in metro and access networks due to its cost-effectiveness and simplicity compared to Dense WDM (DWDM).
Standard CWDM Channels
| Channel | Wavelength (nm) | Frequency (THz) |
|---|---|---|
| 27 | 1270 | 236.06 |
| 29 | 1290 | 232.40 |
| 31 | 1310 | 228.85 |
| 33 | 1330 | 225.41 |
| 35 | 1350 | 222.07 |
| 37 | 1370 | 218.83 |
| 39 | 1390 | 215.68 |
| 41 | 1410 | 212.62 |
| 43 | 1430 | 209.65 |
| 45 | 1450 | 206.75 |
| 47 | 1470 | 203.94 |
| 49 | 1490 | 201.20 |
| 51 | 1510 | 198.54 |
| 53 | 1530 | 195.94 |
| 55 | 1550 | 193.41 |
| 57 | 1570 | 190.95 |
| 59 | 1590 | 188.55 |
| 61 | 1610 | 186.21 |