Coarse wavelength division
multiplexing (CWDM) is a wavelength multiplexing innovation for city and get to
networks. Transmission is acknowledged utilizing 18 channels with wavelengths
between 1270 nm and 1610 nm. Because of the channel separating of 20 nm
financially savvy lasers can be utilized. The channel width itself is 13 nm.
The rest of the 7 nm is intended to secure the space to the following channel.
It is a technique for consolidating multiple signals on laser beams at
different wavelengths for transmission along fiber optic cables, with the end
goal that the quantity of channels is less than in dense wavelength division
multiplexing (DWDM) however more than in standard wavelength division multiplexing
(WDM).