Optical fiber jumper is used to connect the device to the optical fiber wiring link. With a thick protective layer, it is generally used in the connection between the optical end machine and the terminal box.
Optical fiber jumper (also known as optical fiber connector) means that both ends of the optical cable are installed with connector plugs to achieve optical active connection; 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 shield. At the center is a glass core through which light travels. In a multimode fiber, the diameter of the core is 50μm to 65μm, roughly the thickness of a human hair. The diameter of the single-mode fiber core is 8μm~10μm. The core is surrounded by a glass envelope with a lower refractive index than the core to keep the fiber inside the core. On the outside is a thin plastic jacket to protect the envelope.
Optical fibers are mainly divided into two categories:
Fiber jumper according to the different transmission media can be divided into common silicon-based fiber single-mode, multi-mode jumper, there are other fiber jumpers such as plastic as the transmission medium; According to the structure of the connector, it can be divided into: FC jumper, SC jumper, ST jumper, LC jumper, MTRJ jumper, MPO jumper, MU jumper, SMA jumper, FDDI jumper, E2000 jumper, DIN4 jumper, D4 jumper and so on. Common optical fiber jumpers can also be divided into FC-FC, FC-SC, FC-LC, FC-ST, SC-SC, and SC-ST.
Single-mode Fiber: The general fiber jumper is shown in yellow, and the connector and protective sleeve are blue; The transmission distance is long.
Multi-mode Fiber: The general fiber jumper is expressed in orange, and some are expressed in gray, and the connector and protective cover are beige or black; The transmission distance is shorter and the distance is shorter.
Attention to use
The transceiver wavelength of the optical modules at both ends of the optical fiber jumper must be the same, that is, the optical modules at both ends of the optical fiber must be of the same wavelength, and the simple way to distinguish is to have the same color of the optical modules. In general, multi-mode optical fibers (orange optical fibers) are used in short-wave optical modules, and single-mode optical fibers (yellow optical fibers) are used in long-wave optical modules to ensure the accuracy of data transmission.
The optical fiber should not be excessively bent and looped in use, which will increase the attenuation of light during transmission.
After the optical fiber jumper is used, the optical fiber connector must be protected with a protective cover. Dust and oil will damage the coupling of the optical fiber.
If the optical fiber connector is dirty, you can use a cotton swab dipped in alcohol to clean it, otherwise it will affect the quality of communication.
1. Before use, the fiber jumper ceramic insert and insert end face must be wiped clean with alcohol and absorbent cotton.
2, the minimum bending radius of the optical fiber is not less than 150mm.
3. Protect the core and the end face of the core to prevent damage and pollution, and put on a dust-proof cap in time after disassembly.
4. Do not look directly at the optical fiber end face when the laser signal is transmitted.
5. When man-made and other irresistible factors damage, the damaged optical fiber jumper should be replaced in time.
6, before installation should carefully read the instructions, and under the guidance of the manufacturer or dealer engineers for installation and commissioning.
7, the optical fiber network or system is abnormal, you can use the fault elimination method to test one by one. When you test or troubleshoot the jumper fault, you can first perform an on-off test. Usually, you can use a visible laser pointer to light the entire fiber link. Or further use the precision optical fiber insertion loss return loss instrument to test its indicators, indicators within the qualified range, the jumper indication is normal, otherwise it is not qualified.
What does FC\ST\SC\LC\MTRJ, PC\APC\UPC stand for in optical fiber jumper?
The FC, ST, SC, LC, and MTRJ physical interfaces are connected in different ways.
FC is a circular spiral port.
ST is a circular 45 degree bayonet.
SC is a square socket.
LC and MTRJ are small core connectors, which are used less in China, but they are carried on some imported equipment.
PC, APC, UPC represent the front end structure of the ceramic core!
PC is a spherical structure, APC is a diagonal 8 degree Angle structure, UPC is a hyperplane structure.
Introduction to optical fiber jumpers
The Fibre Channel protocol generally transmits over two mediums - optical cable and copper.
Different from the internal transmission of light waves, fiber is divided into single mode (conduction of long wavelength laser) and multi-mode (conduction of short wavelength laser) two categories:
Single-mode fiber (single-mode fiber) : the general fiber jumper is shown in yellow, and the connector and protective sleeve are blue; The transmission distance is long. The connection distance of single-mode cable can be up to 10 kilometers, multi-mode fiber (multi-mode fiber) : the general fiber jumper is expressed in orange, and some are expressed in gray, and the connector and protection cover are beige or black; The transmission distance is short. The connection distance of multi-mode cable is much shorter, is 300 meters or 500 meters (mainly depending on the difference in laser, there are generally two kinds of short-wavelength laser light source, one is 62.5, one is 50)
In addition, there are two types of cable connectors, one SC interface for 1GB interface and one LC interface for 2GB interface. There are many types of fiber jumper, according to the joint shape can be divided into: FC, SC, ST, LC, etc. According to the type of the core, it can be divided into PC, UPC, APC, etc. According to the type of fiber, it can be divided into single mode, 50/125 multi-mode, 62.5/125 multi-mode, polarization maintenance, etc. According to the optical fiber diameter can be divided into: 900μm, 2mm, 3mm and so on. Products are widely used in: communication room, optical fiber to the home, local area network, optical fiber sensor, optical fiber communication system, optical fiber connection transmission equipment, national defense combat readiness and so on.
Distinction
Pigtail is also called pigtail wire, only one end has a connector, and the other end is a broken end of a fiber optic cable core, connected with other fiber optic cable core by welding, often appears in the fiber optic terminal box, used to connect the fiber optic cable and the fiber optic transceiver (between the coupler, jumper, etc.).
The optical fiber connector is a detachable (active) connection device between the optical fiber and the optical fiber, which is the precision docking of the two end faces of the optical fiber, so that the light energy output of the transmitting optical fiber can be coupled to the receiving optical fiber to the maximum extent, and minimize the impact on the system due to its involvement in the optical link, which is the basic requirement of the optical fiber connector. To a certain extent, optical fiber connectors also affect the reliability and performance of the optical transmission system.
Selection guide
Fiber jumper types are ST-ST, SC-SC, and ST-SC. According to the type of fiber, there are mainly single-mode fiber and multi-mode fiber. The jumper length can be 0.5m, 1m, 2m, 3m, 5m, 10m, etc. According to the cable outer coating material can be divided into ordinary type, ordinary flame retardant type, low smoke halogen-free type (LZSH), low smoke halogen-free flame retardant type.
According to the fire rating of the building and the fire resistance requirements of the material, the integrated wiring system should take corresponding measures. Flame-retardant cables and optical cables should be used for laying cables or optical cables in flammable areas and building shafts; In large public places, flame-retardant, low-smoke, low-toxicity cables or optical cables should be used; Flame retardant wiring equipment should be used between adjacent equipment or between connections.
