Optical fiber quick connector, optical fiber jumper


At present, with the continuous development of the domestic communication industry, optical fiber communication has entered the stage of practical use, and the scope of application is getting wider and wider. At the same time, more and higher requirements are also put forward for optical fiber connectors. The development direction is the miniaturization of appearance and low cost, but the requirements for performance are getting higher and higher. the difference.


The difference between embedded fiber optic quick connectors and straight-through

Optical fiber quick splicing connectors are divided into two categories: pre-embedded optical fibers and non-pre-embedded (straight-through) quick connector optical fibers. The main difference is the connection point and connection method:


(1) Connection point setting

The connection point of the pre-embedded optical fiber is set inside the connector, and the pre-embedded optical fiber has a preset matching liquid. The connection point of the non-pre-embedded (straight-through) optical fiber is on the surface of the connector, and the matching liquid is not preset. It is directly connected to the target fiber through the adapter.


(2) Connection method

The optical fiber quick connect connector is to insert and fix the optical fiber in the pin, and after the surface of the pin is polished, the alignment is realized in the coupling tube. The outer components of the pins are made of metal or non-metal materials. The butt end of the ferrule must be ground, and the other end usually uses a bend limiting member to support the fiber or fiber optic cable to relieve stress. The coupling tube is generally made of two semi-synthetic and fastened cylindrical members made of ceramic or bronze and other materials, and is often equipped with a metal or plastic flange to facilitate the installation and fixation of the connector. In order to align the fibers as precisely as possible, the processing precision of the pins and coupling tubes is very high.

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There is no pre-embedded optical fiber and matching paste inside the straight-through optical fiber quick connector device. After the optical fiber is installed and clamped, the end face of the optical fiber can be inspected with a magnifying glass, which can avoid the occurrence of excessive optical fiber connection loss. Axial belt positioning mechanism, during the clamping process, the optical fiber will not move forward axially.


Fiber Quick Connector

The difference between fiber patch cords, pigtails, and fiber optic connectors

(1) The optical fiber jumper is used as a jumper from the equipment to the optical fiber cabling link. It has a thicker protective layer and is generally used for the connection between the optical transceiver and the terminal box.


(2) Pigtails are also called pigtails. Only one end has a connector, and the other end is a broken end of an optical fiber core. It is connected to other optical fiber cores by fusion splicing. It often appears in optical fiber terminal boxes and is used to connect optical cables. and fiber optic transceivers (couplers, jumpers, etc. are also used between them).


Optical fiber connector is a device for detachable (active) connection between optical fiber and optical fiber. It precisely connects the two end faces of optical fiber, so that the light energy output by the transmitting fiber can be coupled to the receiving 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 fiber optic connectors.


To a certain extent, the optical fiber connector also affects the reliability and performance of the optical transmission system. First, the optical cable comes in from the outdoors, and the optical cable must be spliced ​​in the optical cable box, which is the terminal box you said. The fusion of the optical cable is a door technology. It is necessary to strip the optical cable, use the pigtail to fuse with the thin fiber in the optical cable, and put it in the box, so that the pigtail will come out, and the end of the optical fiber will be connected to the ODF (a kind of shelf, connected with a coupler) The other side of the shelf also uses pigtails (it is also possible to use optical fiber jumpers, in fact, pigtails are used for optical fiber jumpers), which are connected to the photoelectric converter. ---LAN ---Host.


In the above steps, the distribution frame of the optical fiber can be ignored. After the pigtail comes out, it is directly connected to the optical fiber transceiver, so there is no need for a coupler. The coupler is to connect 2 pigtails (the thing that connects the fiber jumpers together) optical fiber. A coupler is an active connection for two optical fibers or pigtails, commonly known as a flanged optical fiber terminal box, which is the terminal connector of an optical cable. For equipment with a single optical fiber, the optical fiber fusion splicing box is used to connect two optical cables to form a long optical cable, and they cannot be used interchangeably. Plug pigtails, can we understand the terminal box and the fusion splicing box in this way? In which the two ends of the optical fiber are spliced, but the former is the fusion of the optical cable and the pigtail, and the latter is the fusion between the optical cables. This is basically correct. Is the junction box and the terminal box the same?


It is different. The splice box is fully sealed and waterproof, but it cannot fix the pigtail. The terminal box is not waterproof. The internal structure can fix the optical cable and the pigtail. The coupler is connected to the optical fiber or pigtail, but the connection part It is active, not spliced. The coupler can only connect two pigtails and divide them into SC/PCFC/PC interfaces, and the optical cable and the pigtail are spliced ​​with a fusion splicer, which is dead.


What is the difference between pigtails and jumpers? Can the jumper be split in two as a pigtail?

Only one end of the pigtail is an active connector, and both ends of the fiber jumper are active connectors. There are many kinds of interfaces. Different interfaces require different couplers. A head is called a fiber optic patch cord, and the middle fiber is generally three meters long, which is used to connect a coupler and a fiber optic transceiver, an optical module, or directly connect two devices with optical ports; there is only one head, with a small piece of fiber behind. The pigtail is generally used with two optical fiber jumpers with the same head, and the middle is cut into two pigtails, which are mainly used for welding on the optical cable. After the optical cable is fused with the pigtail head, it can be connected to the coupler or directly. Optical transceivers, optical modules. The fiber optic connector should refer to the coupler (flange), which is used to connect pigtails and fiber jumpers.



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