For Fusion Splicing: Place both fiber ends into a fusion splicer. The machine automatically aligns them using core or cladding alignment technology, then fuses them with an electric arc. Both techniques have their advantages and are suited for different applications, but understanding which method to use can greatly impact the network's. This is where fiber optic cable splicing—the process of creating a permanent, high-performance join between two fiber ends—becomes critical. For network managers and technicians, a poor splice can lead to significant signal degradation, network downtime, and costly troubleshooting. Another method of connecting optical fibers is termination or connectorization, which consists of processing the end of a fiber optic bundle so that it can be connected to other fibers or devices through fiber optic. As fiber optic connections become increasingly mainstream, the need to connect fiber optic cables to one another — or splicing — is also on the rise. That process is called splicing. What Is an Optical Fiber Fusion Splicer? An Optical Fiber Fusion Splicer is a high-tech machine that uses heat to melt (or “fuse”) the ends of two optical fibers together.