:: Choices of connectorsOver the years Jael... Strong Jersey , a large variety of fiber optic connectors have been designed for most fiber optic installations. Lightwave equipment manufacturers have never standardized on any one connector type, they actually provide a selection of connectors for their equipment interface.It is very important to choose the fiber connector type for your applications. You should maintain a connector standard throughout a fiber optic project.:: The components of a fiber connectorFor most fiber optic connectors, the major components are ferrule, connector body, connector cap and strain-relief boot.FerruleThe ferrule is the center part of the connector. It contains the optical fiber in a center hole. Ferrule can be made from ceramic (Zirconia), stainless steel or composite material.Ceramic ferrule is the most popular material since it has stable temperature characteristics. The most common ceramic is Zirconia which is a white hard ceramic material. Ceramic ferrule is used for both single mode and multimode connectors. It offers the lowest insertion loss and the best repeatability.Connector BodyFiber optic connector body can be steel or plastic. The body design differs from connector to connector. The connector body provides the mechanism to hold the ferrule and other parts together. It also provides the locking mechanism for connector mating. The most common locking mechanisms are push-pull , snap-in, thread on and twist-on.Connector CapConnector cap often has the same material as the body: either steel or plastic. The cap can be screw on, twist lock or snap-on for connector mating.Strain-relief BootStrain-relief boot is the part connecting the connector body and the fiber cable. It is often made from rubber. Although it looks minimal, it is actually one of the most critical parts in a connector. It provides strain relief on the optical fiber to prevent micro-bending, breakage and provides mechanical support for fiber and connector handling.:: Legacy Fiber Connector TypesThe following list shows the legacy connector types that have been deployed in numerous fiber optic networks for many years.ST ConnectorST connector was once the most popular fiber connector. It was well-liked for both single mode and multimode fiber connections. The average insertion loss for a ST connector is about 0.5dB.ST connector has a twist-on locking mechanism which is not susceptible to loosening in vibrating environment. It is most often used in LAN networks.FC ConnectorFC connector is popular for single mode applications. It has the lowest insertion loss and the best repeatability. It has a thread-on locking mechanism.SMA connectorSMA connector is a pretty old connector type which is mostly used for multimode applications. 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