The fiber optic connector is a mechanism that is movable between the optical fiber and the fiber optic connection device. Its function is to place the optical fiber on the surface of two precise platforms so that the light output of the light can Fiber Optic Connector reach the fiber coupler of the receiving fiber to the maximum extent, and the optical link can be formed and the influence of the system can be reduced to a minimum. This is the basic requirement for fiber optic connectors. To a certain extent, fiber optic connectors can also affect the reliability of optical fiber transmission and system performance.
Key features of fiber optic connectors include optical properties, interchangeability, reproducibility, tensile strength, temperature, number of mating and so on.
1, optical properties: optical fiber connector optical performance requirements are mainly two basic parameters, insertion loss and return loss. The insertion loss is the connection loss that is connected to the effective light intensity loss, Fiber Optic Connector because the connector is inserted. Insertion loss is the smaller the better, under normal circumstances require not about 0.5dB. Return loss (or reflection loss) refers to the reflection of the connector in the link light intensity suppression, the typical value should not be less than 25dB. In the practical application of the connector, the special polished needle surface can make the return loss larger, usually less than 45dB.
2, interchangeability and reproducibility: fiber optic connector is a common passive device, the same type of fiber optic connector can be used for any connection, and can be used repeatedly, so usually the additional entry loss is generally less than 0.2dB Within range.
3, the tensile strength: For the fiber connector has been connected, the tensile strength of the general requirements of not less than 90N.
4, temperature: Under normal circumstances, optical fiber optic connector must be used in the -40 ℃ to +70 ℃ temperature range.
5, Fiber Optic Connector the number of plug: Under normal circumstances, the current fiber optic connector can be inserted more than l000 times.
The structure of the fiber optic connector
A connector, a permanent connection, or a connector can form a fiber-to-fiber connection, which is different from plug-in and can be disconnected and reconnected. With the development of applications, the types of fiber optic connectors are varied. Different connector types have different characteristics, different advantages and disadvantages, and different performance parameters. But all connectors contain four basic components.
Pin: The fiber is mounted in a very long thin-walled cylinder and acts as a fiber alignment mechanism. The pins are drilled in the middle and have a diameter slightly larger than the diameter of the fiber envelope. The end of the fiber is at the end of the pin. In general, the pins are made of metal or pottery, but may also be plastic.
Connector body: also known as the connector housing, the connector body to accommodate the pin. Typically, the connector body Fiber Optic Connector is made of metal or plastic, including one or more of the workpiece, to keep the fiber in place. The details of these connector body assemblies vary depending on the model of the connector, but the welding and / or flanging is normally used to mount the stiffening member and the cable jacket on the connector body. The pins extend and cross the connector body and snap into the coupling device.
Cable: The cable is mounted on the connector body. Its role is the input point of the fiber. In general, a strain relief cover is provided on the connector between the cable and the connector body, providing additional strength for the connector.
Connection devices: Most fiber optic connectors do not use the male-female structure commonly used in electronic connections. The structure used is a positioning sleeve for the mating connector. A similar device can be installed on the fiber optic Fiber Optic Connector transmitter and receiver, and a connector can be used to pair these devices. These devices are also known as through the bulkhead adapter.
Type of fiber optic connector
According to different classification methods, fiber optic connectors can be divided into different types. Depending on the transmission medium, the fiber optic connectors can be divided into single-mode and multimode fiber connectors. According to different structures, fiber optic connectors can be divided into various models such as ST, SC, FC, LC, MT-RJ, MPO / MTP, MU, DIN, E2000, SMA, BICONIC, D4 and so on. Depending on the tip end of the connector, it can be divided into PC, UPC and APC. Depending on the number of fiber cores, the fiber optic connector can be divided into single-fiber core and multi-fiber-optic fiber optic connectors. In general, about 100 kinds of fiber optic connectors have been put on the market, but only a few occupy a larger share of the market. This is the leading list of connectors in the industry.