Fiber optic loopback cables and fiber optic loopback connectors are used in test applications to isolate the possible problems in the links. There are many types of the fiber optic loopbacks based on the connector types on it and the optical fiber types it use. Classified by the connector types, there are SC, LC, MTRJ, E2000 types, etc, and by the optical fiber types, there are single mode 9/125 fiber optic loopbacks, multimode 50/125 fiber optic loopbacks and 62.5/125 fiber optic loopbacks.

Based on the structure there are fiber optic loopback cables and fiber optic loopback connectors, the later is sometimes called fiber optic molded loopback or fiber optic loopback adapter – just same item different names. The molded loopback use an outer enclosure to protect it and from the outside you do not see the optical cables, they are more compact in size and stronger, we supply the various kinds of optical fiber loopbacks.