LC Pigtail: LC is the abbreviation of Lucent Connector. The connector provides low insertion loss and back reflection. Understanding the differences between these connectors is crucial when. A fiber pigtail refers to a special fiber optic cable that contains a connector at one end and bare optical fiber at the other end. It primarily finds its application in terminating optical fibers on networking equipment, including patch panels, distribution frames, or optical transceivers. LC pigtails come in simplex (single fiber) or duplex (two fibers) configurations. Leviton fiber optic pigtail kits are a good solution for mechanical or fusion splicing applications.