A device that performs wavelength division multiplexing (WDM). See WDM.
"wavelength division multiplexer." YourDictionary, n.d. Web. 23 June 2018. <http://www.yourdictionary.com/wavelength-division-multiplexer>.
wavelength division multiplexer. (n.d.). Retrieved June 23rd, 2018, from http://www.yourdictionary.com/wavelength-division-multiplexer
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