Fusion splicing is the act of joining two end-to-end. The goal is to fuse the two fibers together in such a way that light passing through the fibers is not scattering or reflected back by the Optical splice, and so that the splice and the region surrounding it are almost as strong as the intact fiber. The source of heat used to melt and fuse the two glass fibers being spliced is usually an electric arc, but can also be a laser, a gas flame, or a tungsten filament through which electric current is passed.
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