(Optical fiber coupler (Coupler), also known as splitter (Splitter), is a component that divides optical signals from one optical fiber into multiple optical fibers. It belongs to the field of optical forced components. It is used in telecommunication networks, cable TV networks, user loop systems, It will be used in local area networks, and it is the largest used component in the arrangement of optical fiber connectors (based on ElectroniCat data, the commercial value of the two reached about 2.5 billion US dollars in 2003))