Fiber Optic Cables and Fiber Pigtails are two commonly used connectors in fiber optic communications. Although they look similar, they have significant differences in function, structure, and application scenarios. Without pigtails. In the intricate ecosystem of fiber optic networks, two components play a critical role in ensuring seamless connectivity: patch cords and pigtails. 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. It is usually suitable for field termination using a mechanical or fusion splicer.