Dense Wavelength Division Multiplexing (DWDM) is a cutting-edge optical transmission technology that enables multiple high-speed data channels to travel over a single fiber using different light wavelengths. In the power grid industry, DWDM delivers the high-capacity, low-latency backbone essential for connecting control centers, substations, and data hubs, supporting services like SCADA, tele protection, IP, voice, and video on one unified network.