Fusion splicing uses an electric arc to precisely melt and fuse two cleaved fiber ends together, creating a single, continuous optical fiber. This method results in the strongest and most reliable joint with the lowest possible signal loss, typically less than 0. 1. Fiber splicing means joining two optical fibers (permanently or temporarily) such that light guided in one fiber and reaching the joint (splice) can be transferred into the second fiber with low insertion loss. Imperfect coupling means that some of the light coming from the first fiber gets into. Fusion splicing is the process of fusing or welding two fibers together usually by an electric arc. In this guide, you will find a chronological description of the fusion splicing process, the principal technical standards, and answers to the real-life questions network engineers and procurement teams may have. Either joining method must have three primary characteristics. The three basic fiber interconnection methods are: de-matable fiber-optic connectors, mechanical splices and fusion splices.