Fiber optical connectors mate or connect with optical devices, modules, and fibers. They are one of the most essential components for optical communication. Fiber connectors are also the key parts used in fiber patch cords and fiber pigtails. While there are many different types of fiber connectors, they share similar design characteristics. There are three major components of a fiber connector: the ferrule, the connector body, and the coupling mechanism.

1).Ferrule:two main ceramic ferrule sizes are used for fiber connectors.The ferrule OD size φ2.5mm is for ST, FC and SC Fiber Connectors,and the ferrule OD size φ1.25 mm is for the MU and LC fiber connector versions. PC, UPC or APC refer to how we polish the ferrule of the fiber connectors. Singlemode fiber connectors can be with PC, UPC or APC polish, while multimode fiber connectors only with PC or UPC polish;

2).Connector Body: this is a plastic or metal structure that holds the ferrule and attaches to the jacket and strength members of the optical cable itself;