Optical splitters can be divided into two types based on their working principles: Planar Lightwave Circuit (PLC) optical splitters and Fused Biconic Tapered (FBT) optical splitters. An optical splitter is a crucial passive fiber optic device that splits and combines optical signals. This capability is crucial in telecommunications, especially in Passive Optical Networks (PONs), where fiber-optic networks must. This guide covers what optical fiber splitters are, the main types of optical fiber splitters you should know about, how to pick the right one, and how to install and maintain it properly.