WDM Full Form Name
Full Form of WDM:
Wave Division Multiplexing
WDM Full Form is Wave
Division Multiplexing. With an increase in data usage globally,
it has become imperative to have high capacity communication using limited
available transmission infrastructure. Wave division multiplexing (WDM) is a
technique that helps upgrade an optical network without any overhauling to the
backbone network. In WDM, multiple light signals having varied wavelengths are
transmitted using the same optic fiber, thereby eliminating the need to use
multiple fibers.
The technique uses a device
called multiplex at the source (transmitter) which joins several light signals
having multiple wavelengths together. The combined light signal is then
transmitted via optic fiber and then at the receiving end there is a device
called a de-multiplexer which again splits the light signal to the original
wavelengths. For transmission of the optical signals to longer distances,
optical amplifiers are used. Depending on the wavelength patterns the WDMs can
be divided as Coarse WDM and Dense WDM.
The two differ in the spacing of
the wavelengths, number of channels, and the sophistication level of the
optical amplifiers. Coarse WDM provides around 16 channels while Dense WDM can
provide 40 or 80 channels depending on the kind of multiplexing and
amplification techniques used. Coarse WDM are generally cheaper as compared to
the Dense WDM.