According to the different transmission media, optical fiber connectors can be divided into common silicon-based optical fiber single-mode and multi-mode connectors, and other optical fiber connectors such as plastics as the transmission medium; according to the structure of the connector, the optical fiber connectors can be divided into: FC, SC, ST, LC, D4, DIN, MU, MT and other forms. So, let's learn about some common fiber optic connectors together.
FC is the abbreviation of Ferrule Connector, indicating that the external reinforcement method is using a metal sleeve, and the fastening method is using a turnbuckle. At the earliest, the ceramic pins used in FC type connectors which had a flat contact(FC) on the mating end surface.
This type of optical fiber connector has simple structure, convenient operation, and easy manufacture, but the fiber end is sensitive to fine dust, and is prone to Fresnel reflection, which makes it difficult to improve the return loss performance. Later, this type of connector was improved, using a spherical pin contact (PC) on the mating end surface, and the external structure was unchanged, which greatly improved the insertion loss and return loss performance.
Its shell is rectangular, and the structural dimensions of the pin contacts and coupling sleeves used are exactly the same as those of the FC type. Among them, the end face of the pin mostly adopts the PC or APC type grinding method; the fastening method is the plug-in latch type, without rotation. This type of so many fiber optic adapter types is cheap, easy to plug and unplug, with small insertion loss fluctuations, high compressive strength, and high installation density.
ST and SC interfaces are two types of optical fiber connectors. For 10Base-F connections, the connectors are usually ST type, and for 100Base-FX, the connectors are mostly SC type. The core of the ST connector is exposed, and the core of the SC connector is inside the connector.
The most representative product of this type of optical fiber connector was developed by Bell Labs in the United States. It consists of two cylindrical plugs with frusto-conical ends which formed by precision-molded and a coupling components with double-cone plastic sleeve inside.
DIN47256 optical fiber connector is a connector developed by Germany. the structural dimensions of the pin contacts and coupling sleeves used are exactly the same as those of the FC type, and the end face treatment adopts the PC grinding method. Compared with FC-type optical fiber connector, its structure is more complicated. There is a spring to control the pressure in the internal metal structure, which can avoid damage to the end face due to excessive insertion pressure. In addition, the mechanical precision of this connector is high, so the insertion loss value is small.
MT-RJ started from the MT optical fiber connector developed by NTT. It has the same latch mechanism as the RJ-45 LAN electrical connector. The guide pins which installed on both sides of the small sleeve are directed at the optical fiber to facilitate connection to the optical transceiver. The connector end-face fiber is a dual-core (0.75mm interval) arrangement design, which is mainly used for data transmission to the next generation of high-density fiber optic connectors.
If you have any interests of fiber patch cord, welecome to contact Copperled Technology Co.,Ltd. (Tel: 0755-27896171)
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