In 1982, Sumitomo Electric developed a new fusion splicer, the TYPE-11, to support the splicing of single-mode fiber (SMF/ ITU-T G. 652)*2, which has a core diameter only one-fifth that of MMF. This splicer contributed to Japan's first instal-lation of fiber optic relay systems. Sumitomo Electric Industries, Ltd. Over the years, optical fiber fusion splicing technology has been making steady progress with the advancement of optical fiber production technology and the development. The Sumitomo Electric Group undertook the development of an optical fiber fusion splicer in the 1970s. Fusion splicing is the most widely used method of splicing as it provides for the lowest loss and least reflectance, as well as providing the strongest and most reliable joint between two fibers.
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