The main purpose of fiber optic connectors is to connect optical fibers. Optical fiber connectors, which have been widely used in optical fiber communication systems, have many types and different structures. But on closer inspection, the basic structure of various types of fiber optic connectors is the same, that is, most fiber optic connectors are generally realized by high-precision components (composed of two pins and a coupling tube). Alignment of optical fibers.

In this method, the optical fiber is inserted and fixed in the ferrule, and after the surface of the ferrule is polished, alignment is achieved in the coupling tube. The outer components of the pins are made of metal or non-metal materials. The butt end of the ferrule must be ground, and the other end usually uses a bend limiting member to support the fiber or fiber optic cable to relieve stress. The coupling tube is generally made of two semi-synthetic and fastened cylindrical members made of ceramic or bronze and other materials, and is often equipped with a metal or plastic flange to facilitate the installation and fixation of the connector. In order to align the fibers as precisely as possible, the processing precision of the pins and coupling tubes is very high.