Optical fiber connector according to the different transmission medium can be divided into common silicon-based fiber single-mode and multi-mode connector, there are other such as plastic as the transmission medium of the fiber connector; according to the connector structure can be divided into: FC , SC, ST, LC, D4, DIN, MU, MT, and so on. Here are some common fiber connectors:

1. FC type fiber optic connector

This connector was first developed by the Japanese NTT. FC is the abbreviation of Ferrule Connector, indicating that the external reinforcement is the use of metal sets, fastening for the screw buckle. The earliest, FC type of connector, the ceramic pin used in the butt end face is the plane contact (FC). This kind of connector has the advantages of simple structure, easy operation and easy manufacture, but the fiber end face is more sensitive to dust, and it is easy to produce Fresnel reflection and improve the return loss performance. Later, the type of connector has been improved, the use of docking end face spherical (PC), while the external structure has not changed, making the insertion loss and return loss performance has been greatly improved.

2.ST type optical fiber connector

Commonly used in fiber optic patch panels, shell was round, fastening way for the screw buckle. (For 10Base-F connections, the connector is usually of type ST. Commonly used in fiber optic patch panels).

3. SC type optical fiber connector

This is a fiber optic connector developed by Japan's NTT company. Its shell is rectangular, the use of the pin and coupling sleeve structure size and FC type exactly the same. Which pin the end of the use of PC or APC-type grinding; fastening method is to use plug-and-pin type, without rotation. Such connectors are inexpensive, easy to plug and operate, small fluctuations in interventional losses, high compressive strength, high installation density.

The ST and SC interfaces are two types of fiber optic connectors. For 10Base-F connections, the connector is usually of type ST. For 100Base-FX, the connector is mostly SC-type. The connector of the ST connector is exposed, and the core of the SC connector is inside the connector.

4. Double cone connector

The most representative of this type of fiber optic connector developed by the United States Bell Labs developed by the two precision molding of the end of the head was a conical cylindrical plug and a double with a double cone-shaped plastic sleeve Tube coupling components. DIN 47256 type fiber optic connector This is a connector developed by Germany. The connector and coupling sleeve used in this connector are of the same size as the FC type, and the end face is PC polished. Compared with the FC type connector, its structure is more complex, the internal metal structure in the control of the pressure of the spring, can avoid the insertion pressure is too large and damage the end face. In addition, the mechanical precision of such a connector is high, and thus the insertion loss value is small.

5.MT-RJ type connector

The MT-RJ starts with the MTT developed by NTT with the same latching mechanism as the RJ-45 type LAN electrical connector, aligns the fiber with a guide pin mounted on both sides of the small sleeve. Machine, the connector end of the fiber for the dual-core (interval 0.75mm) arrangement design, is mainly used for data transmission next generation of high-density fiber optic connectors.

6. LC type connector

LC-type connectors are developed by the well-known Bell (Bell) Institute, using a convenient modular jack (RJ) latch mechanism. The size of the pins and sleeves used is half that of ordinary SC, FC, etc., is 1.25mm. This increases the density of the fiber optic connectors in the fiber patch panel. Currently, in the single-mode SFF, LC-type connector has actually occupied the dominant position in the multi-mode applications are also growing rapidly.

7.MU type connector

The MU (Miniature unit Coupling) connector is the world's smallest single-core fiber connector developed by NTT, based on the most widely used SC-type connectors. The connector uses a 1.25mm diameter sleeve and self-retaining mechanism, which has the advantage of being able to achieve high-density mounting. With the MU's l.25mm diameter casing, NTT has developed the MU connector family. (MU-B series) with a self-retaining mechanism, and a simplified socket (MU-SR series) for connecting the LD / PD module and plug, and a socket-type connector (MU-A series) for cable connection, Wait. With the rapid development of fiber-optic networks to larger bandwidth and greater capacity, and the widespread use of DWDM technology, the demand for MU-type connectors will grow rapidly.

8.MC connector

In 2012, the domestic communications company independently developed a smaller, higher density MC connector than the LC connector. Nikon MC fiber optic connector is a high-density single-core optical fiber active connector for a variety of high-density applications, such as large-capacity central room and high-density data center. MC fiber optic connector high density, in the same space up to twice the LC connector, called the world's smallest, the highest density of a connector.

9. other

Fiber optic connectors also refer to the IBM mainframe channel that FICON - FIber Connector came together with G5 servers in 1998. It is based on the Fiber Channel standard, ESCON half-duplex 17MB / s transmission rate increased to full-duplex 100MB / s. Each FICON channel can support up to 4000 I / O operations per second, equivalent to 8 ESCON channels.