Title:
OPTICAL FIBER BASE MATERIAL PRODUCING DEVICE AND METHOD, OPTICAL FIBER BASE MATERIAL, AND OPTICAL FIBER
Document Type and Number:
WIPO Patent Application WO/2024/018917
Kind Code:
A1
Abstract:
Provided is an optical fiber base material producing device which can reduce unevenness in the surface of an optical fiber base material. The optical fiber base material producing device according to an embodiment of the present invention is characterized by comprising: a support portion which rotates a core rod around a rotation axis of the core rod at a rotation speed r, the rotation axis extending in the longitudinal direction of the core rod; and a burner array which includes N (N is an integer equal to or greater than 2) pairs of burners and raw material jetting ports that are provided at an interval of a distance d, reciprocates around the core rod at a speed v in the longitudinal direction, and forms a porous glass portion on the periphery of the core rod, wherein, when the burner array moves by the distance d in the longitudinal direction, the rotation number (L+x) of the core rod is denoted as rd/v=L+x, L is any natural number, and, when the offset x is greater than -0.5 and equal to or smaller than +0.5, the absolute value of the rotation number x is greater than 2/(2N+1) and smaller than 3/(3N-1).
Inventors:
ASAI TOSHIYUKI (JP)
KAWASAKI MITSUHIRO (JP)
KAWASAKI MITSUHIRO (JP)
Application Number:
PCT/JP2023/025183
Publication Date:
January 25, 2024
Filing Date:
July 06, 2023
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
C03B37/018; C03B8/04
Foreign References:
| JP2022018230A | 2022-01-27 | |||
| JP2013043810A | 2013-03-04 | |||
| JP2003081645A | 2003-03-19 |
Attorney, Agent or Firm:
OKABE, Yuzuru et al. (JP)
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