CWDM

CWDM (Coarse Wavelength Division Multiplexing) is a passive technology allowing multiple signals on laser beams at various wavelengths for transmission along fiber optic cables, such that the number of channels is fewer than in dense wavelength division multiplexing (DWDM) but more than in standard wavelength division multiplexing (WDM). Due to its lower cost, it proves to be the initial entry point for many organizations. CWDM typically supports the rate of 2.5Gbps and up to 10Gbps. CWDM is a simple and affordable method to maximize existing fiber by decreasing the channel spacing between wavelengths. There are many benefits of CDWM, including no use of electrical power, extended temperature range (0-70˚C) and lower cost per channel than DWDM and so on.