Wave Division Multiplexing (WDM)

Wave Division Multiplexing (WDM) is a technology used in fiber-optic communication to transmit multiple signals simultaneously over a single optical fiber. It works by sending different data streams on separate light wavelengths (colors), much like different radio stations broadcast on different frequencies. A WDM system combines these multiple wavelengths at the sending end and separates them at the receiving end, allowing efficient use of the fiber's capacity. This technique enables high-speed, high-volume data transmission over long distances with minimal interference, making it essential for internet infrastructure and long-distance telecommunications.