Fiber optic connectors are used to connect two of optical fiber or optical fiber to form a continuous optical path can be reused passive devices, has been widely used in fiber transmission lines, fiber optic wiring rack and fiber testing equipment, instrumentation, is currently the largest number of optical passive devices.
In the optical fiber communication (transmission) Link, in order to achieve different modules. The need for flexible connections between devices and systems, it is necessary to have a removable (active) connection between the optical fiber and the optical fiber, so that the optical path can be transmitted according to the desired channel to achieve and fulfill the predetermined or desired purpose and requirements, Fiber Optic Connector and the device that can realize this function is called a connector. Fiber optic connector is the optical fiber of the two-terminal precision docking, so that the optical energy emitted by the transmission fiber to maximize coupling to the receiving fiber, and because of its interference in the optical link to minimize the impact on the system, this is the basic requirements of optical fiber connectors. To some extent, optical fiber connectors also affect the reliability and performance of optical transmission systems.
The main use of fiber optic connectors is to achieve optical fiber continuity. The connectors in optical fiber communication systems are now widely used in fiber optic connectors. However, the basic structure of all types of connectors "> Fiber connectors is consistent, that is, most connectors" > Fiber optic connectors are generally high precision components (consisting of two pins and a total of three parts of a coupling tube) to achieve optical fiber alignment connection.
Fiber optic connectors will be more widely used in optical fiber systems.
The main purpose of fiber optic connectors is to realize the continuation of optical fiber. Fiber optic connectors have been widely used in optical fiber communication systems, with many kinds and different structures. However, the basic structure of various types of optical fiber connectors is consistent, that is, most of the optical fiber connectors are generally high precision components (consisting of two pins and a total of three parts of a coupling tube) to achieve optical fiber alignment connection. Fiber Optic Connector This method is to put the fiber into and fixed in the pin, and the needle surface polishing treatment, in the coupling tube to achieve alignment. The outer component of the pin is made of metal or nonmetal material. The butt end of the pin must be grinded, and the other end usually uses a bending-limiting component to support the fiber or fiber cable to release the stress. The coupling tube is usually made of two halves of a composite, fastened cylindrical member made of ceramic or bronze materials, and is provided with a metal or plastic flange, so that the connector can be mounted fixedly. In order to align the optical fiber as precisely as possible, Fiber Optic Connector the machining precision of the pin and coupling tube is very high. Performance of fiber optic connectors The performance of optical fiber connectors, first of all optical performance, in addition to the optical fiber connectors to consider interchangeability, repeatability, tensile strength, temperature and the number of plug-and-pull. (1) Optical properties: For optical fiber connectors, the optical performance requirements, mainly the insertion loss and return loss of the two basic parameters. Insertion loss (Insertionloss) is the connection loss, which is the loss of the effective optical power of the link caused by the import of the connector. The smaller the insertion loss, the better the general requirements should not be greater than 0.5dB. The Echo loss (Returnloss, Reflectionloss) is the ability of the connector to reflect the link light power, and its typical value should not be less than 25dB. The actual application of the connector, the needle surface through a special polishing treatment, can make the return loss of greater, generally not less than 45dB. (2) interchangeability, repetitive optical fiber connectors are common passive devices, for the same type of fiber optic connectors can be used in general, and can be reused for multiple use, resulting in the additional loss of imports is generally less than 0.2dB. (3) The tensile strength for the good optical fiber connector, Fiber Optic Connector generally requires its tensile strength should not be less than 90N. (4) The temperature general request, the fiber optic connector must at the -40oc~+70oc temperature to be able to use normally. (5) The current use of the number of plug-fiber connectors can generally be inserted l000 more than once. Some common fiber optic connectors are classified according to different methods, fiber optic connectors can be divided into different types, according to the different transmission media can be divided into Single-mode fiber connectors and multimode fiber connectors; According to the different structure can be divided into FC, SC, ST, D4, DIN, Biconic, MU, LC, MT and other types; According to the connector, Fiber Optic Connector the end of the pin can be divided into FC, PC (UPC) and APC, according to the fiber core number and a single core, multi-core.