What does pigtail bundle mean

A bundled pigtail is a fiber optic cable assembly with multiple fibers, where one end has connectors and the other end is bare for fusion splicing to other fibers.

Definition and Structure

A bundled pigtail, also called a tail fiber bundle, consists of several individual fiber optic strands grouped together. One end of each fiber is terminated with a connector, while the other end is left bare (broken) for fusion splicing to the cores of other fiber optic cables. The fibers are typically protected by an outer jacket and reinforced with aramid fibers for durability and flame resistance.

Types

Bundled pigtails can vary by: Fiber mode: single-mode (yellow sheath, 1310nm/1550nm, long-distance up to 40 km) or multi-mode (orange or blue sheath, 850nm, short-distance up to 500 m),. Number of fibers: common configurations include 4-core, 12-core, or more, often color-coded for easy identification. Connector type: SC, FC, LC, or ST, with polishing types like PC, UPC, or APC.

Function and Applications

Bundled pigtails are primarily used in fiber optic terminal boxes to connect incoming fiber cables to network equipment. The bare ends are fusion spliced to the main fiber lines, while the connectorized ends allow easy connection to patch cords or transceivers. They are widely used in dense fiber networks, optical access networks, and local area networks.

Advantages

High stability and repeatability due to precise manufacturing and quality control. Low insertion loss and high return loss, ensuring efficient signal transmission. Space-saving design with a tight bend radius, suitable for compact installations.

In summary, a bundled pigtail is a multi-fiber assembly that facilitates reliable and organized connections in fiber optic networks, combining the flexibility of connectorized ends with the permanence of fusion splicing.