Optical fiber jumper patch cord (also known as optical fiber connector) refers to the fact that both ends of the optical cable are equipped with connector plugs, which are used to realize the active connection of the optical path; the plug with one end is called pigtail. Optical fiber patch cord (Optical Fiber Patch Cord / Cable) is similar to coaxial cable, except that there is no mesh shield. At the center is a glass core for light propagation. In multimode fiber, the diameter of the core is 50μm ~ 65μm, which is roughly equivalent to the thickness of human hair. The diameter of single-mode fiber core is 8μm ~ 10μm. The outside of the core is surrounded by a glass coating with a lower refractive index than the core to keep the optical fiber in the core. Outside is a thin layer of plastic jacket to protect the coating.

Corning/YOFC Fiber

CCTC ceramic ferrule

IL/RL test

3D test

End surface test

LANs

CATV

WANs

There are many types of fiber jumpers (also called fiber connectors), that is, fiber connectors that connect to optical modules, and they cannot be used interchangeably with each other. The SFP module is connected to the LC fiber connector, and the GBIC is connected to the SC fiber connector. The following is a detailed description of several commonly used fiber optic connectors in network engineering:

①FC fiber optic jumper: The external reinforcement method is to use a metal sleeve, and the fastening method is a screw buckle. Generally used on the ODF side (most used on patch panels)

②SC optical fiber jumper: the connector to connect the GBIC optical module, its shell is rectangular, the fastening method is the plug-in pin latch type, no need to rotate. (Most used on router switches)

③ST type optical fiber jumper: commonly used in optical fiber distribution frame, the shell is round, and the fastening method is screw buckle. (For 10Base-F connection, the connector is usually ST type. Commonly used in fiber distribution frame)

④LC fiber optic jumper: the connector to connect the SFP module, it is made by the latch mechanism of modular jack (RJ) which is easy to operate. (Used by router)