Optical fiber jumper (also known as optical fiber connector) means that both ends of the optical cable are equipped with connector plugs to realize the active connection of the optical path; one end with a plug is called a pigtail. Optical Fiber Patch Cord/Cable is similar to coaxial cable, except that there is no mesh shielding layer. In the center is the glass core through which light propagates. In a multimode fiber, the diameter of the core is 50μm~65μm, which is roughly equivalent to the thickness of a human hair. The single-mode fiber core has a diameter of 8 μm to 10 μm. The core is surrounded by a glass envelope with a lower refractive index than the core to keep the optical fiber in the core. On the outside is a thin plastic jacket to protect the envelope.
LC fiber jumper: developed by BELL Research Institute, the connector is similar to SC, but smaller than SC. It adopts a modular jack latch that is easy to operate. The size of the pin and sleeve is 1.25mm, which is half of the size used by ordinary SC and FC. Connecting SFP optical modules, often used in routers, can increase the density of optical fiber connectors in optical fiber distribution frames to a certain extent.
SC fiber jumper: developed by Japan NTT company, the structure and size of its pin and coupling sleeve are exactly the same as FC type. The standard square connector, the fastening method of the plug-in latch type lock, does not need to be rotated, and is often used as the connector of the GBIC optical module, and is used more on the router. It has the characteristics of low price and low fluctuation of access loss. Commonly used for 100G BASE-FX connection.