The optical splitter plays a critical role in applications such as passive optical networks (PONs), telecommunications networks, fiber-to-the-home (FTTH) installations, and more. Fiber splitters can effectively split optical signals into. Fiber optic splitter, also referred to as optical splitter, fiber splitter or beam splitter, is an integrated waveguide optical power distribution device that can split an incident light beam into two or more light beams, and vice versa, containing multiple input and output ends. Optical splitter. A “splitter” is a power splitter. A splitter is not a filter like a wavelength division multiplexer (WDM). Rarely, there can be two inputs to provide potential redundancy of route.