英語「optical-fiber」の意味・使い方・読み方 | Weblio英和辞書 An optical fiber is a flexible, transparent fiber made of very pure glass (silica) not much wider than a human hair that acts as a waveguide, or "light pipe", to transmit light between the two ends of the fiber The field of applied science and engineering concerned with the design and application of optical fibers is known as fiber optics Optical fibers are widely used in fiber-optic