In this guide, we'll break down what fiber splitters do, how they work, and how to choose the best model for your application. It enables one signal source (OLT) to serve multiple. Whether you're deploying a Passive Optical Network (PON), connecting MDUs, or expanding fiber access in rural zones, the right splitter configuration can dramatically affect performance, layout simplicity, and project cost. These devices help you control light signals well. You can also use them to join light from. A fiber optic splitter is a passive optical component that divides a single incoming optical signal into two or more outgoing signals, or combines multiple incoming signals into one.