What Is Wavelength Division Multiplexing (WDM)?
Wavelength Division Multiplexing, usually written in short form as WDM, is an advanced technology that enables you to multiplex (combine) a number of optical carrier signals onto a single optical fiber by utilizing various wavelengths of laser light. This technology allows for bidirectional, as well as multidirectional communication over a single fiber. In a WDM system, a multiplexer is used at the transmitter to combine various signals together and a demultiplexer is used at the receiver to split those signals apart. If you have the right type of fiber, a device can do both simultaneously and can work as an optical add-drop multiplexer. WDM systems are available in three standard types: · WDM (normal) · CWDM (coarse) · DWDM (dense) A normal WDM is sometimes also referred to as BWDM as it typically uses two wavelengths 1310 and 1550nm on one fiber. Whi...