It describes three main splicing methods - de-matable connectors, mechanical splices, and fusion splices. Fusion splicing welds two fibers together using an electric arc and provides the lowest loss. more. In this guide, we cover the basics of fiber optic splicing, how to perform splicing using two different methods, and finally some best practices to perform good fiber splicing. What is Fiber Optic Splicing and Why is it Needed? – #1. 1dB for fusion) and degrade over time in outdoor environments. If you have your own equipment, do the recommended exercises. See the FOA Virtual Hands-On for the process of fiber optic.