Optical Transceiver

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Wavelength-Division Multiplexing (WDM)

Different wavelengths can travel simultaneously through the same fiber. This technique is called WDM (Wavelength-Division Multiplexing)

Think of a fiber as a highway, and different wavelengths as different lanes

reference

J. Q. Wang et al., "7.1 A 2.69pJ/b 212Gb/s DSP-Based PAM-4 Transceiver for Optical Direct-Detect Application in 5nm FinFET," 2024 IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA, 2024, pp. 123-125, doi: 10.1109/ISSCC49657.2024.10454275.