The photocoupler consists of a light source and a light receiver. The light-emitting source and the light-receiver are assembled in the same closed casing, and are separated from each other by a transparent insulator. The light-emitting source pins are input terminals, and the light-receiver pins are output terminals. Common light-emitting sources are light-emitting diodes, and the light-receivers are photodiodes, phototransistors, and so on.
The function of the optical fiber coupler is to implement optical signal splitting / combining, or an element used to extend the optical fiber link. It belongs to the field of optical passive components and is used in telecommunication networks, cable television networks, user loop systems, and local networks. applicable to. The main functions are:
1. Converting optical signals into electrical signals;
2. Coupling multi-mode signals into single-mode signals;
3. Conduct the fiber holes of the cross sections of the two fiber connectors;
4. Connect the two sets of optical signals to each other.