A fusion splicer installs, repairs, and maintains fiber optic splicer wires that are used in high-speed communications. A professional uses a number of specialized tools and techniques to cut, connect, and test wires. He or she usually receives specialized training on how to diagnose problems with cables and make delicate repairs. An expert fiber splicer might work in a consumer electronics manufacturing plant as an assembler and installer, or a communications company, such as a cable television and Internet provider, as a fiber optic technician.

Optical fibers are minuscule wires made of glass or plastic that are capable of transmitting massive amounts of information through pulsations of light. The process of splicing fibers together involves carefully cutting and exposing bare fibers, then joining the ends using specialized crimping tools, glues, and precision arc welders. Bundles of fibers are usually wrapped together into a cable and insulated with a moisture-proof sheath. Professional fusion splicer manufacturer frequently attach adapters on the ends of finished cables so they may be plugged into computers or other electronic devices.