What is fiber optic fusion splice loss? Fusion is the process of permanently joining two fiber optic cables together in a way that eliminates signal strength degradation. The purpose of it is to minimize such losses and guarantee high quality transmission of information signals. Technical aspects of a fiber optic fusion splice include the accurate alignment for establishing good signal transmission; using carefully controlled heat to melt and fuse together individual fibers; and special tools to provide the quality of splice needed. This process is particularly significant in telecommunications, data centers, and cable TV, as rapid and reliable data transmission are fundamental requirements. The efficiency of a system and quality throughout an entire network are both influenced directly by the performance of a splice itself.