What is the process called when fusion splicing pigtails

Fusion splicing of pigtails is a permanent fiber optic joining process that uses heat to fuse two fibers into a continuous, low-loss connection.

Overview

Fusion splicing is a permanent splicing process used to join the bare end of a fiber optic pigtail to an incoming fiber cable. Unlike mechanical splicing, which aligns fibers without melting them, fusion splicing uses a high-precision electric arc to melt the fiber ends together, creating a seamless, homogeneous joint with minimal light loss and reflection.

Process Details

Preparation: The fiber ends are stripped, cleaned, and cleaved to produce smooth, flat surfaces. Alignment: The fibers are precisely aligned in a fusion splicer, which ensures the cores are perfectly matched. Fusion: A controlled electric arc melts the fiber ends, fusing them into a single continuous strand.

Result: The splice is permanent, with typical insertion loss between 0. 01–0. 05 dB and very low back reflection, making it ideal for high-performance networks.

ApplicationsSingle-mode fiber terminations: Most field terminations for single-mode fibers are done by fusion splicing factory-made pigtails onto installed cables. Backbone and long-haul networks: Fusion splicing is preferred where low loss and high reliability are critical. Permanent joints: It is the standard method for outside plant cables and any application requiring a stable, long-lasting connection.

Advantages

Extremely low insertion loss and back reflection. High mechanical strength and stability. Cost-effective for large-scale splicing despite the initial investment in a fusion splicer.

In summary, fusion splicing of pigtails is classified as a permanent, heat-based fiber optic splicing process that ensures a continuous, low-loss optical path between fibers, making it the preferred method for high-performance and long-term network installations.