A fiber optic pigtail is a short length of optical fiber —typically 0. 5m to 2m—that has a factory-terminated connector on one end and bare fiber on the other end., switches, routers, transceivers) to passive components (e., patch panels, ODFs) or other devices. Pigtails are available in various fiber types, such as single-mode or multi-mode, and connector types, including SC, LC, ST, or FC.