The primary loss associated with fiber PLC splitter is insertion loss—the reduction in signal power that occurs when light passes through the splitter. Excess. Optical splitters, including FBT couplers and PLC splitter (Planar Lightwave Circuit) splitters Optical splitters, including FBT (Fused Biconical Taper) couplers and PLC (Planar Lightwave Circuit) splitters, are common passive optical devices that split the fiber optic light into several parts by a. Understanding the loss characteristics of individual ports in Planar Lightwave Circuit (PLC) splitters is essential for designing robust, efficient optical networks. While theoretical models provide baseline expectations, actual deployed components exhibit port-specific variations that must be. In any FTTH network, the PLC splitter is not just a passive optical component — it is a capacity decision point. Every time you double the ports, you double the signal paths — and the theoretical loss grows by about 3 dB. Enter the number of outputs and the excess loss from your splitter datasheet to see the total. 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.