DWDM Channel Calculator
Calculate ITU-T G.694.1 DWDM channel wavelengths and frequencies.
Common C-Band Channels (100 GHz)
| Channel | Frequency | Wavelength |
|---|---|---|
| 17 | 191.7 THz | 1563.86 nm |
| 21 | 192.1 THz | 1560.61 nm |
| 34 | 193.4 THz | 1550.12 nm |
| 44 | 194.4 THz | 1542.14 nm |
| 61 | 196.1 THz | 1528.77 nm |
ITU-T DWDM Grid
Grid Formula
Frequency (THz) = 193.1 + n * spacing
Wavelength (nm) = c / frequency
Where n is the channel number offset from reference, c = 299792.458 km/s
Wavelength (nm) = c / frequency
Where n is the channel number offset from reference, c = 299792.458 km/s
ITU-T G.694.1 defines the DWDM frequency grid anchored at 193.1 THz (1552.52 nm). Channels are numbered relative to this reference.
Spectral Bands
- C-Band: 1530-1565 nm, ~4.4 THz, standard EDFAs
- L-Band: 1565-1625 nm, ~6.0 THz, extended capacity
- S-Band: 1460-1530 nm, emerging technology
- 100 GHz: 45 channels in C-band
- 50 GHz: 90 channels in C-band