After the fusion is complete, you slide the sleeve over the joint and bake it in the splicer's internal oven. Fiber optic cable splicing is the process of joining two fibers end-to-end to create a continuous optical path. After two fibers are precisely fused using a fusion splicer, the splice is fragile and needs protection from physical stress, moisture, dust, and other. This guide reveals the secrets to fusion splicing with little fluff—just proven, straightforward techniques refined from years of work in the field. It is specifically designed for the protection of fiber optical. When two fibers undergo fusion splicing, the splice sleeves protect the exposed fibers and the splice joints after the splicing process is completed.