This machine can tab reliably very precise fiber optic joint welding: two cables are held together with the ends melted and fused, creating a durable connection where quality communications information about which fibers are used is difficult to ensure. Also, it provides a second splicing function that involves the low-loss splicing technology connected directly with detection systems. This ensures maintenance of critical signal transmission path integrity in telecommunication networks. The splicer has an automatic alignment system which focuses the fibers exactly on each other as they are spliced into one, a high-resolution camera for better image display of fiberglass than ever before, and a tough design ability to withstand rough handling as well as easy portability. With a variety of working modes, this fusion splicer can be applied for various purposes such as telecommunication, data centers, CATV installations, and fiber-to-the-home (FTTH) implementations.