FC(M)-LC(F) Hybrid Adaptor

LC stands for Lucent Connector. The LC is a small form-factor Fiber optic connector.
The LC Connector uses a 1.25 mm ferrule, half the size of the SC. Otherwise; it is a standard ceramic Ferrule connector. The LC has good performance and is highly favored for single mode. APC polish is with an angle for 8 degrees in the ferrule.

FC stands for Fixed Connection. It is fixed by way of threaded barrel housing. FC connectors are typical in test environments and for single mode applications. FC connectors were designed for use in high-vibration environments. The FC Connector is the most popular connector used today. It can be seen in every area of the communications environment, from a telecom’s distribution room to a LAN closet, the FC has set the standard for optical Fiber connectors. FCS are being replaced by SC and LC connectors.