The two primary industry-accepted methods for fiber optic cable splicing are fusion splicing and mechanical splicing. The choice between them depends on performance requirements, budget constraints, and the specific application environment. The goal is to achieve the lowest possible optical loss (signal. 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. 1dB loss that will last the life of the cable plant. For network managers and technicians, a poor splice can lead to significant signal degradation, network downtime, and costly troubleshooting. Fusion splicing provides a low-loss, highly reliable connection by melting and fusing fiber ends, making it ideal for long-haul.