In fiber optic communications, wavelength division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (colors) of laser light. This technique enables bidirectional communications over one strand of fiber, as well as multiplication of capacity.
The term wavelength-division multiplexing is commonly applied to an optical carrier (which is typically described by its wavelength), whereas frequency-division multiplexing typically applies to a radio carrier (which is more often described by frequency). Since wavelength and frequency are tied together through a simple directly inverse relationship, the two terms actually describe the same concept.
WDM (Wavelength Division Multiplexing)
- CWDM (Coarse Wavelength Division Multiplexing)
CWDM Device
CWDM OADM Module
CWDM MUX/DEMUX Module
- DWDM (Dense Wavelength Division Multiplexing)