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The Optical Fiber
By Jin-hui Chen, Si Zhang, Shao-cheng Yan, and Shi-jun Ge, Nanjing University, China
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Optical communication is closely connected with our daily life, because our telephone signals, Internet communications and even the cable television signals are all carried by it to some degree. Optical fiber is very thin, whose diameter is comparable with human hair. There are two kinds of optical fiber regarding their supporting mode number, i.e. single mode fiber and multimode fiber. Both of them are made of silica and they are composed of two parts, cladding and core.