PLC splitter, also called Planar Waveguide Circuit splitter, is a device used to divide one or two light beams into multiple light beams uniformly or combine multiple light beams to one or two light beams.
It is a passive optical device with many input and output terminals, especially applicable to PON (EPON, GPON, BPON, FTTX, etc.) to connect the MDF (main distribution frame) and the terminal equipment and to branch the optical signal.