公开(公告)号：US20200012042A1

公开(公告)日：2020-01-09

申请号：US16571974

申请日：2019-09-16

Applicant: FURUKAWA ELECTRIC CO., LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Shinichi ARAI ,  Harumi Inaba ,  Shigeto Matsumoto ,  Takeshi Yagi ,  Shinichi Aozasa ,  Kyozo Tsujikawa ,  Kazuhide Nakajima

IPC: G02B6/02 ,  G02B6/036

Abstract: An optical fiber manufacturing method includes setting a first holding member and a rod inside a glass pipe, the first holding member made of glass and having plural holes formed, so that the rod is supported by the first holding member; filling glass particles between the rod and a glass pipe inner wall; holding the rod such that the rod and the filled glass particles are enclosed by the glass pipe inner wall and the first and second holding members, and sealing one end of the glass pipe and manufacturing an intermediate; and manufacturing an optical fiber from the intermediate, wherein a bulk density of the first and second holding members is set with reference to a bulk density of a filling portion made from the glass particles, and the predetermined range is determined according to a core diameter permissible variation range in its longitudinal direction.