公开(公告)号：US20180224598A1

公开(公告)日：2018-08-09

申请号：US15749484

申请日：2016-07-25

申请人： FUJIKURA LTD.

发明人： Yutaka Endoh ,  Tomoaki Toriya ,  Katsuaki Izoe ,  Manabu Kudoh ,  Tsuyoshi Shimomichi

IPC分类号： G02B6/02 ,  C03B37/028 ,  G02B6/04

CPC分类号： G02B6/02042 ,  C03B37/01211 ,  C03B37/028 ,  C03B2201/08 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/21 ,  G02B6/02 ,  G02B6/036 ,  G02B6/04 ,  G02B6/06

摘要： A multicore optical fiber that includes: a core that is formed of silica glass doped with at least fluorine, the core having a relative refractive index difference with respect to a refractive index of silica as a reference being −0.30% to −0.10%; and a clad that is formed of silica glass doped with at least fluorine. The clad includes a first clad surrounding an outer periphery of the core and a second clad provided outside the first clad. A relative refractive index difference between the first clad and the core is 0.8% or more. A refractive index of the second clad is higher than a refractive index of the first clad and lower than a refractive index of the core.