Despite their strengths, FBT splitters are not without limitations, particularly in precision and scalability. Typically, but not always, there is one input in and multiple outputs. Light power goes in and light power coming out of the various legs is reduced in. 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. To. Wavelength dependency is a key characteristic: FBT splitters are often optimized for specific bands, such as 1310 nm for single-mode PONs or 1550 nm for video overlays, with insertion losses around 3. 5 dB for a 1x2 splitter, per ITU-T G.