As of now, fiber optic splicing can be carried out using one of two methods — fusion splicing and mechanical splicing. Ensure Your Splicing Tools are Clean – #2. In this guide, we'll explore what splicing of fiber entails, why it's important, and dive into the key methods and tools. This is where fiber optic cable splicing—the process of creating a permanent, high-performance join between two fiber ends—becomes critical. The goal is to achieve the lowest possible optical loss (signal. Fiber Optic Cable Splicing is the method of joining two fiber optic cables together.