Fiber Fusing is a mechanism used to protect fiber optic cables from damage caused by unsafe levels of optical power. It works by incorporating a tiny core made of fused silica into the fiber, with a diameter that is much smaller than the core of the fiber that transmits the optical. The fiber optic cable core is the very fiber optic core – an integral part of a light signal's transmission that can be critical. It's the functional heart of the cable, typically made of ultra-pure silica (silicon dioxide), and its diameter can be as narrow as 9 microns, roughly one-tenth the width of a human hair. This. A fiber optic cable consists of five basic components: the core, the cladding, the coating, the strengthening fibers, and the cable jacket. It is a cylinder of glass or plastic that runs along the fiber's length.
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