How does DWDM Work?

To explain how DWDM works, we first need to explain how the WDM works. Wavelength-division multiplexing, or WDM, uses a multiplexer to join several different data streams and convert them into wavelengths of light before transmitting it over the fiber optic cable, which is then de-multiplexed at its receiving end and split back into its respective streams of data.

How DWDM works

Being a dense form of WDM, DWDM uses the same multiplexer to de-multiplexer transmission method, except that it can fit much more channels. To put that into perspective, if each channel carries 100Gbps of data, then at 160 channels per fiber cable, DWDM can essentially have a capacity of 1.6Tbps of data per fiber cable.

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