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Single mode fibers were invented in 1980 by a group led by Professor Huang Hongjia of the Chinese Academy of Sciences. Subsequently, in 2009 Nobel Prize in Physics was awarded to Charles K. Kao for his theoretical work on single-mode optical fibers. Single-mode fiber finds its application in long distance, higher bandwidth runs by Telcos, CATV companies, and Colleges and Universities. A peculiar property of single-mode fibers is that the transverse intensity profile at the fiber output has a fixed shape, which is independent of the launch conditions and the spatial properties of the injected light. Single Mode fiber optic cable has a small diametric core that allows only one mode of light to propagate. Because of this, the number of light reflections created as the light passes through the core decreases, lowering attenuation and creating the ability for the signal to travel faster,