The best splicers offer core alignment, fast splice times, durable designs, and smart features like cloud syncing and automated calibration. Top-rated models. Fusion splicing is the process of fusing or welding two fibers together usually by an electric arc. But with so many models and brands available, how do you choose the right one? In this guide, we'll. With this in mind, we have prepared the ultimate guide on how to use a fusion splicer on fiber optic cables. The guide covers everything from basic principles of fusion splicing to detailed procedures; it is intended to provide both newbies and professionals with the necessary knowledge and skills. This guide reveals the secrets to fusion splicing with little fluff—just proven, straightforward techniques refined from years of work in the field. This method boasts minimal insertion loss and negligible back reflection, ensuring robust connections that stand the test of time.