The optical transceiver module (like an SFP, SFP+, or XFP module) in the OLT is the laser source that generates the initial light signal. This high-power signal is transmitted down the single fiber. When it reaches the optical splitter, the signal is divided and sent. 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. Conversely, it can also combine multiple signals into one. It is a passive optical device with many input and output terminals, especially applicable to. An Optical Splitter (also known as a fiber optic splitter or beam splitter) is a passive optical power management device.