Key features of Optical Fiber Connectors
The key features of optical fiber connectors include optical properties, interchangeability, reproducibility, tensile strength, temperature, and frequency of inserting and drawing.
1. Optical properties: Optical performance requirements of optical fiber connectors are mainly two basic parameters, insertion loss and return loss. The insertion loss is the connection loss of the effective light strength loss, because the connector is plugged in. The insertion loss is as small as possible, and generally requires not about 0.5dB. The Echo loss (or reflection loss) is the light intensity inhibition of the reflector in the link, and the typical value should not be less than 25dB. In the practical application of the connector, the special polishing treatment of the needle surface can make the return loss greater, usually not less than 45dB.
2, interchangeability and reproducibility: The fiber connector is a general-purpose passive device, the same type of fiber connector can be used in any connection, and can be reused, so usually the additional loss of entry in the case is generally less than 0.2dB.
3, tensile strength: For the fiber connector has been connected, tensile strength under normal circumstances requirements of not less than 90N.
4, Temperature: In general, optical fiber connectors must be used in the temperature range of 40 ℃ to +70℃.
5, the number of plug-and-pull: Usually, the current fiber connector can be plugged more than l000 times.
Structure of Optical Fiber Connectors
Connectors, permanent connections, or connectors can form fiber-optic connections, which, unlike interpolation, can be disconnected and reconnected. With the development of the application field, the types of Optical Fiber Connectors are varied. Different connector types have different characteristics, different advantages and disadvantages, and different performance parameters. However, all connectors contain four basic components.
Pins: The fiber is mounted in a long thin-walled cylinder, and the pins act as a fiber alignment mechanism. The pin is drilled in the middle, and the diameter is slightly larger than the diameter of the fiber cladding. The end of the optical fiber is at the end of the pin. In general, pins are made of metal or pottery, but may also be plastic.
Connector body: Also known as the connector shell, the connector body accommodates the pins. In general, the connector body is made of metal or plastic, including one or more assembly parts, capable of keeping the fiber in place. The specific details of the connectors are different depending on the model of the connector, but the weld and/or flanging is usually used to install the reinforcing member and the cable sheath on the connector body. The insertion needle extends over the connector body and is jammed into the bonding device.
Optical Cable: The cable is mounted on the connector body. The function is the input point of the fiber. In general, a strain removal shield is installed on the connector between the optical cable and the connector body to provide additional strength to the connector.
Connecting devices: Most Optical Fiber Connectors do not use the common head-head structure commonly used in electronic connections. The structure used is a positioning sleeve for paired connectors. Similar devices can be installed on fiber-optic transmitters and receivers, which can be paired with a single connector. These devices are also known as through-type bulkhead adapters