Question: What is Wavelength Division Multiplexing ( WDM ) in optical communications. Give an outline with the help of a simple diagram of a WDM system

What is Wavelength Division Multiplexing (WDM) in optical communications. Give an outline with the help of a simple diagram of a WDM system and a list of its important basic functions.
What is Wavelength Division Multiplexing ( WDM )

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