Introduction to Fiber Optic Connector

We all know that a fiber optic patch cable consists of a fiber optic cable and two fiber optic connectors. Since we already have the basic knowledge of fiber optic cable, we now shift our attention towards fiber optic connectors. We have many ways to identify different types of fiber optic connectors. For example, according to the polish type, they can be classified into PC, UPC and APC. According to the different transmission media, fiber connectors can be categorized into single-mode and multimode fiber optic connectors. And according to the fiber count, there exists simplex and duplex fiber optic connectors. In the following paragraphs, we will mainly introduce FC, SC, LC, ST, MPO connectors.

FC Connector

FC connector was initially developed by NTT, Japan. FC is short for Ferrule Connector. It uses a 2.5 mm ferrule and is designed with a metal housing and are nickel-plated. This kind of connector is simple in structure, convenient operation. Unlike the push-pull type, FC connector needs to be mated more carefully because they have to align the key and in case of scratching the fiber end face while inserting the ferrule into the jack. The insertion loss for matched FC connector is 0.25 dB. Nowadays, FC connector has been replaced in many applications by SC and LC connectors.

SC Connector

SC connector, known as subscriber connector, uses a push-pull plug similar to audio and video plugs and sockets. It has a 2.5mm ferrule that provides accurate alignment. Typical matched SC fiber connector is rated for 1000 mating cycles. SC connector is a square connector with low price, and high comprehensive strength. SC connector offers excellent packing density, and its push-pull design reduces the chance of fiber end face contact damage during connection. The only disadvantage of this connector is the relatively large size.

LC Connector

As the successor to the SC and ST types. LC connector, also known as Little Connector, is a small form factor connector that uses a 1.25 mm ferrule. LC fiber connector provides a fully proof design and small size perfect for high density applications. It is available in simplex and duplex versions. It can improve the density of optical fiber connector in the optical fiber distribution frame. It is simple and stable and is produced by many manufactures. It has a typical insertion loss of 0.10 dB.

ST Connector

ST stands for Straight Tip. ST connector has a bayonet mount and a long cylindrical 2.5mm ceramic (usually) or polymer ferrule to hold the fiber. Most ferrules are ceramic, but some are metal or plastic. ST connector can be inserted into and removed from a fiber-optic cable both quickly and easily. The insertion loss of the ST connector is less than 0.5 dB, with typical values of 0.3 dB being routinely achieved. The ST connector is used extensively both in the field and in indoor fiber optic LAN applications. Its high-precision, ceramic ferrule allows its use with both multimode and single-mode fibers.

MPO Connector

MPO (Multi-fiber Push On) is a connector for ribbon cables with four to twenty-four fibers. It has a lot of fibers in one connector and therefore it reduces the amount of time required to connect fibers. With push-on insertion release mechanism, it provides consistent and repeatable interconnections. MPO connectors were used for FTTH (mass ribbon splicing) and Data Centers.

Conclusion

Have you got a clear clue about FC, SC, LC, ST, MPO connectors after this article? Knowing the types and capabilities of the connectors, then how can we find and get them? Here I want to recommend you FS.COM. Its connectors are made with precision and high quality ceramic components, providing a high reliability connection when used with various adapters. Have any question? Or you need specific information about something? We are glad to be your consultant.