DWDM

DWDM stands for dense wavelength division multiplexing

Dense wavelength division multiplexing (DWDM) is a technology that puts data from different sources together on an optical fiber, with each signal carried at the same time on its own separate light wavelength. Using DWDM, up to 80 (and theoretically more) separate wavelengths or channels of data can be multiplexed into a lightstream transmitted on a single optical fiber. Each channel carries a time division multiplexed (TDM) signal. Only the range and the number of "color" are

difference to CWDM:

• larger range
• more colors
• faster
• expensive
• coold laser