What type of couplers are typically used to extend the length of patch cables with ST connectors?

ST couplers are specifically designed to connect and extend the length of patch cables that have ST connectors. This type of coupler accommodates the unique barrel-shaped design of the ST connectors, which use a bayonet-style locking mechanism. When needing to combine two ST patch cables to reach a longer distance, using an ST coupler ensures a secure and effective connection that maintains the integrity of the optical signal.

Other coupler types, such as LC, FC, or MPO, serve different connector styles and are not compatible with ST connectors. LC couplers are tailored for LC connectors which have a smaller, more compact form factor. FC couplers match the FC connector’s design, which is also distinct. MPO couplers are used with MPO connectors, commonly associated with higher-density fiber applications. Therefore, the use of an ST coupler is essential for maintaining compatibility and performance when extending ST patch cables.