A WDM multiplexer (MUX) at the transmitting end of a fiber-optic link combines several optical signals, each with a distinct wavelength, into a single optical fiber. This allows multiple independent data streams to travel simultaneously without interference, effectively multiplying the fiber's transmission capacity and making efficient use of the optical infrastructure . At the receiving end, a demultiplexer (DEMUX) separates the combined signals back into their original wavelengths for processing by individual receivers .
WDM multiplexers are widely used in telecommunications, data centers, and cloud networks to maximize fiber utilization, support high-speed data transmission, and enable scalable network upgrades without laying additional fibers . They also facilitate advanced network topologies and redundancy, making optical networks more robust and efficient . In summary, an optical WDM multiplexer is a key device in modern fiber-optic communication, allowing multiple data channels to coexist on a single fiber, enhancing capacity, efficiency, and flexibility in optical networks.
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