At its core, a fiber optic splitter relies on the principles of light reflection, refraction, and waveguiding to divide signals. Conversely, it can also combine multiple signals into one. This type of device plays an important role in passive. 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.