DWDM is an optical fiber communication transmission technology, it is the use of an optical fiber can simultaneously transmit a plurality of different wavelengths of light characteristic wavelength range into the fiber may be applied to a number of bands, each band used a separate channel to transmit a predetermined wavelength of the optical signal technology.

DWDM Transceiver, as its name suggests, is a kind of optical transceiver which combines the DWDM technology.