This is more complex than joining electrical wire or cable and involves careful cleaving of the fibers, precise alignment of the fiber cores, and the coupling of these aligned cores. For applications that demand a permanent connection a fusion splice is common. Such fibers are widely used in fiber-optic communication, where they permit transmission over longer distances and at higher bandwidths (data transfer rates) than electrical cables. Unlike traditional copper or. Fiber Optics or Optical Fiber is a technology that transmits data as a light pulse along a glass or plastic fiber. Wyant Professor of Optics at the.