Optical Fiber Quick Connector Embedded Optical fiber and non-embedded (straight-through)


At present, with the continuous development of communication industry, optical fiber communication has stepped into the practical stage, and the scope of application is more and more wide, at the same time, also put forward more and higher requirements for optical fiber connector, its main development direction is the appearance of miniaturization, low cost, and the performance requirements are increasingly high. The following describes the differences between embedded optical fibers, non-embedded (straight-through) optical fibers, fiber jumpers, and pigtail.


The difference between embedded fiber quick connector and straight - through


Optical fiber quick connector uses two types of technologies: embedded optical fibers and non-embedded (straight-through) quick connector optical fibers. The main differences are as follows:


(1) Connection point setting

The connection point of the embedded optical fiber is arranged inside the connector, and the embedded optical fiber has preset matching liquid. The non-embedded (straight-through) optical fiber is connected to the target optical fiber directly through an adapter without preset matching liquid on the connector surface.

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(2) Connection method

The optical fiber quick connection connector is to insert the optical fiber into the pin and fix it. After polishing the pin surface, alignment is achieved in the coupling tube. The outer component of the pin is made of metallic or non-metallic materials. The butt end of the pin must be ground, and the other end usually uses a bending restraint member to support the fiber or fiber soft cable to release stress. Coupling tube is generally made of ceramic, bronze and other materials made of two halves of the composite, fastening cylindrical members, often equipped with metal or plastic flanges, to facilitate the installation and fixation of the connector. In order to align the optical fiber as accurately as possible, the machining accuracy of the pin and coupling tube is very high.


There is no embedded optical fiber or matching paste inside the straight-through optical quick connector. After the optical fiber is clamped, use a magnifying glass to check the end face of the optical fiber to avoid high connection loss. Axial belt positioning mechanism, the optical fiber will not move forward during clamping process.


Optical fiber quick connector


Differences between fiber jumpers, pigtails, and fiber connectors


(1) Optical fiber jumper is used for the jumper connection from the device to the optical fiber routing link. It has a thick protective layer and is generally used for the connection between the optical end machine and the terminal box.


(2) tail fiber also called pig tail line, only one end of the connection head, and the other end is a fiber optic cable core break, through the fusion and other fiber optic cable core is connected, often appear in the fiber terminal box, used to connect the fiber optic cable and transceiver (between the coupler, jumper, etc.).


Optical fiber connector is removable (activities) between optical fiber and optical fiber connection device, it is to put the fiber of two surface precision docking, so that the optical output of light energy to maximize the coupling to the receiving optical fiber, and optical link due to the intervention and to minimize the effects on the system, it is the basic requirement of optical fiber connector.


To a certain extent, optical fiber connector also affects the reliability and the performance of optical transmission system, fiber optic cable from outside come in first, fiber optic cable to weld in cable box, is what you said terminal box, optical cable of the welding is door technology, need to put the cable strip away, with fine fiber tail fiber and cable in welding, welding in a box, so that we end fiber came out, The end of the optical fiber is connected to the ODF (a kind of shelf, connected with a coupler). The other side of the shelf is also connected to the optical fiber (fiber jumper can also be said, in fact, the tail fiber is used to do the optical fiber jumper), and is connected to the photoelectric converter. The optical transceiver is connected to the router ---- switch -- LAN -- host.


In the above steps, the fiber distribution frame can be ignored, and the pigtail is directly connected to the fiber transceiver after coming out, so that the coupler is not needed. The coupler is the 2 tail fiber (fiber jumper connected together) fiber coupler is used for the activity of two fiber or tail fiber connection popularly known as flannel fiber terminal box is a fiber optic cable end joint, his end is a fiber optic cable, the other end is tail fiber, is equivalent to a fiber optic cable split into a single fiber equipment, Optical fiber fusion box is two optical cable butt into a long optical cable with, between them is not interchangeable use, between the optical cable and optical terminal machine is connected through the optical fiber terminal box, that is, the optical terminal machine can only plug the tail, about the terminal box and fusion box can be understood in this way? In which the TWO ends OF THE OPTICAL fiber are fused, EXCEPT that the former is the fusion of the cable and the pigtail, and the latter is the fusion between the cable. This is basically right is the connection box the same as the terminal box?


The connecting box is fully sealed and waterproof but it can't hold the pigtail. The terminal box is not waterproof. The internal structure can hold the cable on one side and the pigtail on the other. The coupler is connected to the fiber or pigtail, but the connection part is movable, not fused, The coupler can only connect two pigtails and sub SC/PCFC/PC interface, and between the cable and pigtails is fused by the fusion machine is dead.


What's the difference between pigtail and jumper? Can a jumper split in two be used as a pigtail?


Tail fiber is only one end of the active joint, jump fiber both ends are active joint, there are many kinds of interface, different interface needs different couplers, jump fiber split into two can be used as tail fiber, we are doing this, one side has a head called fiber jumper, the middle of the fiber is generally three meters long, It is used to connect coupler and optical transceiver, optical module or directly connect two devices with optical ports; There is only one head, behind with a small section of fiber is pigtail fiber, generally two fiber jumpers of the same head, cut into two pigtail fiber, mainly used to fuse on the cable, cable fusion pigtail head, can be connected to the coupler or directly connected to the fiber transceiver, optical module. The FIBER CONNECTOR REFERS TO THE COUPLING (flange), which is used to connect the PIGtail to the fiber jumper.


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