FC-SC Type: Circular to square tail fiber, where FC connects to ODF boxes, and SC connects to equipment ports. Widely used in early SBS and Optix devices. It is typically used to connect fiber optic transceivers, fiber optic switches, fiber optic splitters, fiber optic. Pigtail, also known as pigtail, has only one end with a connector, and the other end is a broken end of a fiber optic cable core. One. Bynet Square Tail Fiber Pigtail is a precision-engineered optical component designed for high-accuracy light coupling, micro-optical device integration, and fiber-optic sensing systems. Diferent parameters of the fibers, such as numerical aperture, refractive index profile and length, have been already optimized for better performance.