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 used in 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 connector exposed and the SC’core is inside of the connector.
(3) the biconical connector
The 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 connector
This 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 connector
MT-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.
(6) LC-type connector
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, FC and the size is 1.25mm. This can increase the density of fiber optic connector in fiber optic patch panel. In single-mode SFF, LC type connector actually have occupied a dominant position, and the application of multimode have rapid growth.
(7) Type MU connector
MU (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 diameter casing 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 greater bandwidth of the direction of and DWDM technology widely used ,MU connector demand will grow rapidly.
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