Fiber optic patch cords are used as jumpers from equipment to fiber optic cabling links. It has a thick protective layer and is generally used for the connection between the optical transceiver and the terminal box.

Optical fiber jumper (also known as optical fiber connector) refers to that connector plugs are installed at both ends of the optical fiber cable to realize the active connection of the optical path; A plug installed at one end is called a pigtail. [1] Optical Fiber Patch Cord/Cable is similar to coaxial cable, except that there is no mesh shielding layer. At the center is a glass core that transmits light. In multimode fiber, the core diameter is 50 μ m~65 μ m. It is roughly equivalent to the thickness of human hair. The diameter of single-mode fiber core is 8 μ m~10 μ m。 The core is surrounded by a glass envelope with a refractive index lower than that of the core to keep the fiber in the core. The outer layer is a thin plastic jacket to protect the envelope.