Optical fiber transmission line

专利名称：Optical fiber transmission line

发明人：Iwata, Noriko, Sumitomo Electric Industries,

Ltd.,Kato, Takatoshi, Sumitomo Electric Ind.,Ltd.,Fukuda, Keiichiro, Sumitomo Electric Ind.,Ltd.

申请号：EP02006602.3申请日：20020322公开号：EP1243950A3公开日：20040602

专利附图：

摘要：The present invention relates to an optical fiber transmission line having a

structure offering superior connection loss characteristics at the fusion-spliced position(A) between optical fibers (10,20). This optical fiber transmission line has at least first (10)and second (20) optical fibers that are fusion-spliced. Each of these first and secondoptical fibers has a core region doped with 10 mol% or more of Ge and has a mode fielddiameter with a minimum value of 7 µm or less at the wavelength of 1550 nm. Thedifference between the minimum mode diameter of the first optical fiber and that of thesecond optical fiber is 1 µm or less. In particular, in this optical fiber transmission line, themode field diameter of the first optical fiber (MFD), at a position separated by at least 2mm from the fusion-spliced position between the first and second optical fibers, isenlarged so as to reach a value of 110% or more of the minimum mode field diameter ofthe first optical fiber, and the mode field diameter of the second optical fiber (MFD), at aposition separated by at least 2 mm from the fusion-spliced position between the firstand second optical fibers, is enlarged so as to reach a value of 110% or more of theminimum mode field diameter of the second optical fiber.

申请人：Sumitomo Electric Industries, Ltd.

地址：5-33, Kitahama 4-chome Chuo-ku Osaka-shi, Osaka 541-0041 JP

国籍：JP

代理机构：HOFFMANN - EITLE

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