Fusion splicing provides a low-loss, highly reliable connection by melting and fusing fiber ends, making it ideal for long-haul applications, whereas fiber mechanical splicing offers a quick and practical solution for field repairs and temporary connections by using a junction to. Fusion splicing provides a low-loss, highly reliable connection by melting and fusing fiber ends, making it ideal for long-haul applications, whereas fiber mechanical splicing offers a quick and practical solution for field repairs and temporary connections by using a junction to. 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. Use and Maintain Your. Fiber optic splicing is the process of joining two fiber optic cables together so that light signals can pass with minimal loss or reflection. Splicing is typically required during cable installation, maintenance, or network expansion. 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. Fiber optic cables are the invisible highways of our digital world, carrying massive amounts of data at the speed of light.