WDM combines a series of optical signals with different information but different wavelengths and transmits them along a single fiber. WDM technology can be devided into two different type: one is CWDM and another one is DWDM. DWDM combines optical carriers on a single fiber to increase the transmission capacity of each fiber.  CWDM (Sparse … Continue reading Basic Knowledge of DWDM(Dense Wavelength Division Multiplexing)