(1) FC type optical fiber connector
The connector was originally developed by the Japanese NTT.FC is the abbreviation of Ferrule Connector, indicating
that its external reinforcement is made of metal sleeve andfastened by screw buckle. The connector has the advantages of simplestructure, easy operation and easy fabrication, but the optical fiber terminal is sensitive to dust, and is easy togenerate Finel reflection, so it is difficult to improve the performance of return loss. Later, the type of connector was improved by using the spherical pin (РC) on the end face of the joint, but the external structure was not changed, which greatly improved the insertion loss and the echo loss performance.
(2) SC type optical fiber connec tor
This is an optical fiber connector developed by Japan NTTcorporation. The shell of the utility model is rectangular,and the structural dimensions of the contact pin and the coupling sleeve are exactly the same as those of the FC type. The end face of the pin adopts PC or APC grinding method; the fastening mode adopts plug pin and latch type,and does not need rotating. The connector has low price,convenient insertion and operation, small fluctuation of the intervening loss, high compressive strength and high installation density.
The ST and SC interfaces are two types of fiber connectors.For 10Base-F connections,connectors are usually of type ST.
For 100Base-FX, connectors are mostly SC type. The core ofthe ST connector is exposed and the core of the SC connector is insidethe connector.
(3) biconical connector :(Biconic, Connector) ;
The most representative products by the Baer laboratory developed this kind cf optical fiber connector, which consists of two end precision molding is cylindrical conical plug coupl ing component and a double tapered plastic sleeve with internal composition.
(4) DIN47256 type optical fiber connector
This is a connector developed by germany. The structure ofthe pin and coupling sleeve used in the connector is thesame as that of FC, and the end face treatment adopts PCgrinding method. Compared with the FC type connector, thestructure of the utility model is more complicated, and thespring with the control pressure in the inner metal
structure can avoid the damage of the end face because theinsertion pressure is too large. In addition, the
mechanical accuracy of the connector is higher, so that theintervening loss value is small.
(5) type MT-RJ connector
MT-RJ started with MT connector developed by NTT,
With RJ-45 LAN the same type electrical connector latchmechani sm,
the guide pins are installed in the small casing
on both sides of the alignment of optical fiber and opticaltransceiver for optical fiber connector end face is
connected to a dual core
(0. 75mm interval) arrangement
design, is mainly used for data transmission to the nextgeneration of high density optical fiber connector.
(6) type LC connector
The LC type connector is developed by the renowned Bell(Baer) Research Institute, which is made of handy modularjack (RJ) latch mechanism. The sizes of the pins and
sleeves adopted are half the size of ordinary SC, FC and soon, and 1. 25mm. This will increase the density of the fiberconnector in the fiber optic distribution frame. At present,in the aspect of single- -mode SFF, connectors of LC type
have actually occupied the leading position, and the
applications in multi-mode are also increasing rapidly.
(7) type MU connector
MU (Miniatureunit Coupling)connector is the world's smallest single core optical fiber connector based on the most widely used SC connector at present,developed by NTT,
The connector uses a 1. 25mm diameter .bushing and self retaining mechanism, with the advantage of achieving high density mounting.Utilizing the MU 1.25mm diameter bushing
NTT has developed the MU connector series. They are used for socket type connector cable connection(MU-A Series);with self retaining plate connector mechanism (MU-B Series)and to simplify the socket connection LD / PD module and plug (MU-SR series). With the rapid development of fiber network to larger bandwidth and larger capacity, and the wide application ofDWDM technology the demand for MU connector will increase rapidly.
