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Optical fiber jumpers are the most common parts and raw materials for intelligent engineering, and guide the optical signal to which set of machinery and equipment to be finally transmitted, and then complete the function of light-to-electricity and electricity-to-light conversion of machinery and equipment. Optical fiber patch cords are also necessary for beginners in light current installation to understand some of the main basic raw materials. First, they must learn to understand this raw material; second, they must learn how to configure patch cords according to machine equipment. You can see this long ago. Talk about how to calculate the content of the article with fiber jumpers; third, you must learn how to use it, and only when you understand these three levels can you really use it in new projects. The key fiber optic cables in fiber optic patch cords are OM2, OM3, OM4, OM5 multimode fiber and OS2 single mode fiber. The key types of fiber optic patch cords on the street are MPO , SC, FC, LC, ST, etc., depending on the specific conditions. Carry out choices.

Types of fiber optic adapters

Different connectors are used for different machines and equipment, the key is the leakage of MPO, SC, FC, LC, ST sockets.
MPO type optical fiber jumper: used for the connection of 40G, 100G optical modules and high-density big data centers;
LC type optical fiber jumper: used for the connection of SFP optical module, it uses modular design socket, and this type of leaky line is generally used for wireless routing;
SC type optical fiber jumper: connect GBIC optical module, its case is rectangular frame, the tightening method is to choose the latch type, without turning, generally put more on the wireless router network switch;
FC-type optical fiber jumper: The external lifting method uses a metal material cover, and the tightening method is a turnbuckle. Generally, more optical fiber distribution frames are placed;
ST type optical fiber jumper: the casing is round, and the tightening method is turnbuckle. Generally, there are more optical fiber distribution frames.

Type of fiber optic cable
Use 9/125um optical fiber cable for single-mode optical fiber leakage line, and use 50/125um or 62.5/125um optical fiber cable for multi-mode optical fiber jumper.
The single-mode fiber leaky line is used for long-distance transmission of data, and the multimode fiber jumper is used for short-circuit transmission. The sheath of the general multimode fiber jumper is light yellow, and the multimode fiber jumper is divided into OM2 (orange red), OM3 (lake blue), OM4 (dark purple) and OM5 (bean green).

RF connector milling method
Different milling methods determine the quality of fiber optic laser welding. PC/UPC tone is dark blue and APC tone is emerald green.

PC physics touch. PC is a micro-curved surface grinding and polishing, the surface of the ferrule is ground into a slightly curved surface, and the fiber core is located at the highest point of the bend, which can reasonably reduce the air gap between the fiber cable components and make the two fiber cable inner holes Touch to physics.

UPC super physics inner hole. The inner hole of the UPC RF connector is not completely flat, but has a slight slope for more precise connection. UPC basically improves the polishing of the inner hole and the surface smoothness of the PC, and the inner hole looks more rounded.

The APC slope physics touches, the inner hole of the optical fiber cable is generally milled into an 8° slope. The 8° angle slope makes the inner hole of the fiber cable more inseparable, and the light is reflected to the insulating layer according to its slope angle of view instead of immediately returning to the lamp source, showing a stronger connection characteristic.

The typical insertion loss of PC, UPC and APC RF connectors is less than 0.3dB. Because of the smaller air gap, UPC/PC is easier to achieve low insertion loss. PC return loss is -45dB, UPC return loss is generally -50dB (or even higher), APC industry standard return loss is -60dB.

Optical fiber jumper protective cover material
Generally, fiber optic patch cords are made of PVC and LSZH materials.
PVC polyethylene raw materials are flammable and can cause harmful gases, not suitable for use in the room, with high quality and low price;
LSZH low-smoke halogen-free raw materials, environmental protection and flame retardant grades are good, but the price is more expensive.
When choosing an optical fiber jumper, you must also consider the length of your specific application. When choosing an optical fiber jumper, you must not only ensure the credibility of the raw materials, but also pay attention to the transmission speed and loss size, and refer to the actual basic parameters.

The inner hole of the ferrule should be maintained in the application of the fiber jumper to avoid knocks, and the anti-fouling cap should be carried immediately after disassembly and assembly. The laser data signal should not be looked into the inner hole of the fiber cable during transmission.