Optical fiber, referred to as fiber optics, is a light-conducting tool that achieves transmission of light by total reflection in fibers made of glass or plastic. Fiber optic cable is a certain number of optical fibers in accordance with a certain way to form the core of the cable, the outer jacket, some also covered with an outer jacket, to achieve optical signal transmission of a communication line. Usually a transmitting device at one end of the fiber uses a light-emitting diode or a laser beam to transmit light pulses into the fiber, and a receiving device at the other end of the fiber uses a photosensitive component to detect the pulses. The cable containing the optical fiber is called a fiber optic cable. The use of optical fibers as a means of transmitting information over long distances was prompted by the fact that the transmission losses of light in optical fibers are much lower than those of electricity conducted through wires, and even more so by the fact that the main raw material for production is silicon, which is extremely abundant and easier to mine, and therefore cheaper. As the price of optical fiber is further reduced, optical fiber is also used for medical and recreational purposes.