PC Fiber Pigtail: The PC fiber pigtail uses a physical contact connector. They are the bridge between fiber optic cables in the field and the equipment or patch panels that manage them. Get the wrong connector type, the wrong polish, or skip proper fusion splicing technique—and you're looking at elevated signal loss, increased back reflection, and a. A fiber pigtail is typically a fiber optic cable with one end factory pre-terminated fiber connector and the other exposed fiber. Despite representing less than 1% of total fiber infrastructure cost, they account for 30-40% of all fiber network faults in enterprise and data.