Fusion Splice

Fusion splice is the process of fusing or welding two fibers together by the application of localized heat sufficient to fuse or melt the ends forming a continuous single fiber. The splicing process begins by preparing each fiber end for fusion. Fusion splicing requires that all protective coatings be removed from the ends of each fiber. The fiber is then cleaved. The quality of each fiber end is inspected using a microscope. In fusion splicing, splice loss is a direct function of the angles and quality of the two fiber end faces. The basic fusion splicing apparatus consists of two fixtures on which the fibers are mounted and two electrodes. Inspection microscope assists in the placement of the prepared fiber ends into a fusion splicing apparatus. The fibers are placed into the apparatus, aligned, and then fused together. The small size of the fusion splice and the development of automated fusion splicing machines have made electric arc fusion one of the most popular splicing techniques in commercial applications.
Multimode fibers can be harder to fusion splice as the larger core with many layers of glass that produces the graded-index profile are sometimes harder to match up, especially with fibers of different types or manufacturers.

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