At its core, a fiber optic splitter relies on the principles of light reflection, refraction, and waveguiding to divide signals. many aspects of a Fiber to the X (FTTx) network. A splitter is. In the backbone of modern Fiber-to-the-Home (FTTH) networks, optical splitters serve as the unsung heroes that enable cost-efficient connectivity for millions of subscribers. It can distribute the optical energy transmitted through a single fiber to two or more fibers in a predetermined ratio or combine the optical energy from multiple fibers into one fiber.