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 (i. But navigating the alphabet soup of CWDM, DWDM, MWDM, LWDM, and SWDM can be daunting. This technique enables better fiber utilization, as it increases fiber capacity by a factor of 16-96 and enables building effective optical networks. In an era where connectivity and data exchange are paramount, WDM stands as a.