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Talking about the application of optical fiber connector

Date: 2019-12-09  Author: Fucheng

The optical fiber connector is an indispensable device for connecting various devices in an optical fiber communication system, and is also the optical fiber device with the largest amount of use at present. Due to the gradual fiberization of local communication networks and the rise in demand for metropolitan area networks and user access networks, the total demand for the global fiber optic connector market has continued to expand in recent years. It is expected that the annual growth rate in the next ten years will be about 20%.


The optical fiber connector has a great influence on each interface of the transmission system. The optical fiber transmission equipment itself can instruct the connection. In some cases, most or almost all of the optical fiber transmission connectors are made manually. The amount of signal lost by a fiber optic cable during signal transmission is mainly determined by the quality and type of the fiber optic cable used, and each connection end will cause a certain amount of signal loss. Depending on the type of optical fiber connector selected by the user, the total amount of signal loss at the connection end may exceed the amount of signal loss generated by the fiber optic cable itself.


The optical fiber connection has very strict requirements on the precision of the equipment, so the connector must be very clean. Optical fiber connectors and accessories are usually installed in a sleeve. A finger print or external dust may affect the performance of the connector and even cause transmission failure. Therefore, when the connector is not connected, it should be stored in a clean protective sleeve.


When connecting, we should also wedge the fiber optic connector tightly. In all current fiber optic connector designs, it is carried out through "ferrules" to ensure that the connectors are accurate when matched. The fiber termination is a permanent component inside the ferrule by adhesive or crimping. After inserting the built-in optical fiber, the ferrule end is ground smoothly to provide a smooth interface for the connector fiber connector. Ferrules are usually made of relatively hard materials such as ceramics. Since the functional characteristics of the ferrule can be produced according to precise requirements, it has become the first important and deterministic characteristic of the optical fiber connector. Among the many ferrules, spring-loaded container connector ferrules ensure coaxial alignment between the fiber and the LED or laser source.


According to Shenzhen Kehaiguang, a professional fiber optic connector manufacturer in South China, fiber optic connectors cannot be used alone. They must be mated with other connectors of the same type to form a light path connection. At present, the more popular optical fiber connector assembly and docking methods are: using epoxy heat curing agent, the optical fiber is fixed in the high-precision ceramic plug ***, and then the two pins are passed through the adapter under the action of external force The positioning of the sleeve realizes the docking between the optical fibers.


With the development of technology and the expansion of applications, fiber optic connectors have also developed rapidly. At present, there are more than 70 kinds of optical connectors in the world, and new varieties are still appearing, but in the market (especially the Chinese market), the mainstream varieties are still precision ceramic plugs with a diameter of φ2.5mm that have been inherited in early years Connectors composed of core and ceramic tube (such as FC, SC, ST, etc.). In addition, the demand for φ1.25mm ceramic core small connectors (such as LC, MU, etc.) and multi-core connectors (such as MTP, etc.) based on ribbon fiber connectors has also gradually increased, which can support new transmission distribution. The system requires more transmission density.

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