The channel spacing of CWDM is 20nm, while the channel spacing of DWDM ranges from 0. 2nm, so relative to DWDM, CWDM is called sparse wavelength division multiplexing technology. ) WDM systems are popular with telecommunications companies because they allow them to expand the capacity of the network without laying more fiber. By using WDM and optical amplifiers, they can accommodate several. Module will support the switching of spatial and wavelength super-channels as well as a combination thereof. Wavelength division multiplexing (WDM) is a technology that combines two or more optical carrier signals of different wavelengths (carrying various information) at the transmitting end through a multiplexer (also called a combiner, Multiplexer) and couples them to the same optical fiber of the. Abstract Wavelength division multiplexing or WDM allows the combining of a number of independent information-carrying wavelengths onto the same fiber, because of the wide spectral region in which optical signals can be transmitted efficiently.
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