Fiber splicing is the process of joining two optical fibers to create a continuous light path, while fiber testing ensures the integrity and performance of these connections. Common methods include optical time-domain reflectometry (OTDR) and optical loss test sets (OLTS). This is essential for extending network reach, repairing breaks, or connecting cables in data centers and telecom infrastructure. The goal is to align the microscopic glass cores (typically. 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. Ensure Your Splicing Tools are Clean – #2.