Title:
光ファイバ製造方法
Document Type and Number:
Japanese Patent JP7172088
Kind Code:
B2
Abstract:
Provided is an optical fiber manufacturing method that uses a low-cost large optical fiber preform having high precision. The optical fiber manufacturing method includes at least a positioning step of positioning core rods in a hollow carbon pipe that contains carbon as a main component, a soot preform preparation step of filling a gap between the carbon pipe and the core rods with silica powder that contains SiO2 as a main component, thereby producing a soot preform, a consolidating step of introducing the soot preform into a furnace and consolidating the silica powder, thereby producing a transparent intermediate preform from the soot preform, an extraction step of extracting the transparent intermediate preform from the carbon pipe, and a drawing step of drawing the transparent intermediate preform, thereby manufacturing an optical fiber.
Inventors:
Tetsuya Nakanishi
Takushi Nagashima
Takushi Nagashima
Application Number:
JP2018061332A
Publication Date:
November 16, 2022
Filing Date:
March 28, 2018
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
C03B37/014; C03B37/027
Domestic Patent References:
| JP11060260A | ||||
| JP2013512851A | ||||
| JP9124332A | ||||
| JP6051139A |
Foreign References:
| WO2018005584A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Towa International Patent Office