Fiber optic connectors

Fiber optic connectorsThe fiber optic connectors is the removable (active) device connected between the fiber optical cables, make the two optical fiber end face precision to dock, so that the output light energy of transmitter optical cable can be maximize coupling to the receiving fiber cable. And make sure its impact can be minimized because of its involvement in the optical link system , which is the basic requirements for fiber optic connectors. To a certain extent, fiber optic connectors also affected the reliability and the performance of fiber optical transmission systems.Fiber optic connector according to the different transmission media can be divided into common silicon-based optical fiber single-mode and multimode connectors, as well as other issues such as plastic and as the transmission medium of optical fiber connector; connector structure can be divided into: FC,SC, ST, LC, D4, DIN, MU, the MT and so on . The ST connector is usually usedconnector typically used for network equipment side. Fiber end shape in the FC, PC (including SPC or UPC) and APC; divided by the number of the fiber core as well as single and multi-core(such as MT-RJ) points. Fiber optic connectors are widely used variety. In practical applications, we generally in accordance with the different structure of the fiber optic connector to be distinguished.The Fiber optic connectors typesaccording to the different transmission media can be divided into common silicon-based optical fiber single-mode and multimode connectors, as well as other issues such as plastic and as the transmission medium of optical fiber connector; connector structure can be divided into: FC SC, ST, LC, D4, DIN, MU, the MT and so on in various forms.1) FC fiber optic connector .This connection was first developed by NTT. FC is abbreviation of Ferrule Connector. Its external strengthen is metal sleeve, fastening by the turnbuckle. The earliest, FC type connectors were usedin ceramic pin docking port. Such connector structure is simple, easy to operate, easy production. However, the fiber end face is more sensitive to dust, and prone to Fresnel reflection, is more difficult to improve return loss performance. Later, this type of connector have some improvements: using the butt end leaving spherical pin (PC), while the external structure is not changed, making the insertion loss and return loss performance has been dramatically increased.(2) SC fiber optic connectors.This is also developed by Japan's NTT fiber optic connectors. The shell is rectangular, used in the structure of the pin and coupling sleeve size, exactly same with the FC type. Pins of end use of the PC or APC polishing; fastening method is using of the plug pin latch without rotation. Such connectors are inexpensive, easy to operate, plug, involved in the loss volatility, higher compressive strength and high density mounting.ST and SC connector are two types of fiber optic connectors. For 10Base-F connection, the connector is usually ST type ;For 100Base-FX usually IS SC type connector. The core of the ST connectorexposed and the SC’core is inside of the connector.(3) the biconical connectorThe most representative products in the fiber optic connectors category, developed by the U.S. Bell Labs, it was composed by the two ends of precision molding forming truncated conical cylinder plug and an in-house is equipped with dual cone-shaped plastic sleeve tube coupling components.(4) DIN47256 optical fiber connectorThis is a German-developed connector. This connection uses the structure of the pin and coupling sleeve size same with FC.PC polishing end processing. Compared with FC connector, its structure is more complex, the internal metal structure with spring to control the pressure to avoid docking excessive pressure damage face. In addition, this connector with high mechanical precision, and thus less involved in the value loss.(5) MT-RJ connectorMT-RJ, MT started in the development of NTT connectors with the same RJ-45 LAN power connector latch body, align the optical fiber installed in a small casing on both sides of the guide pin, a letter for easy and light transceiver The machine is connected to the connector end fiber for dual-core (intervals 0.75mm) arranged in the design, is used mainly for data transmission, the next generation of high-density fiber optic connectors.LC-type connector is made of the famous Bell Institute of Research and Development, and easy to operate modular jack (RJ) latch mechanism. Their use of pin and sleeve size is half of the ordinary, SC,application of multimode have rapid growth.(7) Type MU connectorMU (Miniature unit Coupling) connector is based on the currently most used SC connector. It is world's smallest single-core optical fiber connector developed by NTT. The connector with 1.25mm diametercasing and self-sustaining institutions, its advantage lies in its ability to achieve high-density mounting. MU's l.25mm diameter casing, NTT has developed the MU connector family. They have a socket-type connector for fiber optic cables (MU-series); from the backplane connector (MU-B series) and maintain institutions for simplified connection of LD / PD module and plug socket (MU-SR Series) and so on. With the rapid development of fiber-optic network to the greater capacity and greaterrapidly.。