Choose which bands to include: C-Band, L-Band, or both
For DWDM, select Grid Type (Fixed or Flex)
Set the frequency range
Click "Generate Channel Plan"
Export your plan to your preferred format
Technical Reference
CWDM (Coarse Wavelength Division Multiplexing)
CWDM uses wider channel spacing (typically 20nm) that allows for the use of less expensive, uncooled lasers. CWDM is typically used for shorter distances and lower bandwidth requirements.
Channel spacing: 20nm
Wavelength range: 1270nm to 1610nm
Number of channels: 18
DWDM (Dense Wavelength Division Multiplexing)
DWDM uses much narrower channel spacing, allowing for more channels in the same fiber. DWDM is typically used for long-haul, high-capacity applications.
Fixed Grid DWDM
50 GHz spacing: Higher channel density, commonly used in modern networks
100 GHz spacing: Standard spacing defined by ITU-T
200 GHz spacing: Wider spacing for older systems
Flex Grid DWDM
Flexible grid allows for variable channel spacing, typically in multiples of 12.5 GHz or 6.25 GHz. This is useful for high-speed signals that may require wider bandwidth than the fixed grid allows.
Optical Bands
C-Band (Conventional): 1530-1565 nm, the most commonly used band for DWDM systems
L-Band (Long): 1565-1625 nm, used for extending the capacity of DWDM systems
Converting between Frequency and Wavelength
The relationship between frequency (f) and wavelength (λ) is given by:
λ = c/f
Where c is the speed of light in vacuum (approximately 299,792.458 km/s)
For optical communications, typically:
λ(nm) = 299792.458 / f(THz)
Color Bands
In some systems, channels are divided into "red" and "blue" bands to help with organization and troubleshooting:
