Fiber optic adapter (also known as the flange), also known as fiber optic connector, is the optical fiber connector connector. Series of products include: FC. SC. ST. LC. MTRJ. Widely used in fiber optic patch panel (ODF). Optical fiber communication equipment. Superior performance, stable and reliable.
The fibers are connected by adapters through their internal open bushings to ensure maximum linkability between fiber jumpers. In order to be fixed on a variety of panels, also designed a variety of fine fixed flange. Transformer adapters can be connected to different types of fiber jumper interfaces and provide connections between APC end faces. Double or multiple connections can increase mounting density.
The fiber optic connector is a detachable (active) connection between the optical fiber and the optical fiber which precisely engages the two end faces of the optical fiber so that the light energy output from the emitted optical fiber can be coupled to the receiving fiber to the maximum, And minimizes the impact on the system due to its involvement in optical links, which is a fundamental requirement for fiber optic connectors. To a certain extent, fiber optic connectors also affect the reliability and performance of optical transmission systems. Optical fiber connector according to the different transmission medium can be divided into common silicon-based fiber single-mode, multi-mode connector, there are other such as plastic as the transmission medium of the fiber connector; connector structure can be divided into: FC , SC, ST, LC, D4, DIN, MU, MT, and so on. Among them, ST connectors are usually used for wiring equipment, such as fiber patch panels, fiber optic modules, etc .; and SC and MT connectors are usually used for network equipment. According to the shape of the fiber end points are FC, PC (including SPC or UPC) and APC; according to the number of optical fiber is divided into single and multi-core (such as MT-RJ) points. Fiber optic connectors are widely used and varied. In the practical application process, they are generally in accordance with the different structure of the fiber connector to be distinguished. Here are some of the more common fiber connectors:
(1) FC type
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 connector, the butt end of the ceramic pin used. This kind of connector has the advantages of simple structure, convenient 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 face spherical face (PC), while the external structure has not changed, making the insertion loss and return loss performance has been greatly improved.
(2) SC type
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 method; 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 mounting density. The ST and SC interfaces are two types of fiber optic connectors. For a 10BASE-F connection, 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.
(3) double cone type
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.
(4) DIN47256 type
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 to be more complex, the internal metal structure in the control of the pressure of the spring, you can avoid the plug pressure is too large and damage the end face. In addition, the mechanical accuracy of such a connector is high, and thus the insertion loss value is small.
(5) MT-RJ type
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 optical fiber connector.
(6) LC type
LC-type connector is well-known BELL (Bell) Institute of research and development, the use of easy to operate modular jack (RJ) latch mechanism made. 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. At present, 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
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 1.25 mm diameter sleeve and self-retaining mechanism, which has the advantage of being able to achieve high-density mounting. With MU's L.25MM diameter sleeves, 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.