Since the 1920s, the first known application of fiber optic Although emerged as an element showed itself over the last 20 years. The first commercial application was in the medical field. Fiber-optic cable for transmitting light to the area of the body without surgery universally available and used in the ratio of the image to bring medical attention. The recently began to use fiber-optic laser treatment. Further down the fiber in communications has brought great changes occur . koblo a single optical fiber has a wide bandwidth and multi-core phone instead of thick cables over long distances was enough. In today's imaging system it has begun to take an active part .