Title:
PRODUCTION METHOD OF POROUS GLASS FINE PARTICLE, AND PRODUCTION METHOD OF OPTICAL FIBER PREFORM
Document Type and Number:
Japanese Patent JP2019214489
Kind Code:
A
Abstract:
To provide a production method of porous glass fine particles that suppresses generation of defects at an interface between a soot layer and a starting base material while keeping production efficiency.SOLUTION: A production method of porous glass fine particles includes a first layer formation step for forming a first soot layer on the surface of a starting base material 1 and an outer layer formation step for forming a plurality of soot layers on the outside of the first soot layer. In the first layer formation step, the first soot layer is formed without blanks in the longer direction. In the outer layer formation step, a group of burners 2 is reciprocated in the longer direction of the starting base material 1 while a raw material gas is supplied to each burner 2a-2d of the group of burners 2 to form the soot layers.SELECTED DRAWING: Figure 1A
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Inventors:
SATO NOBUTOSHI
Application Number:
JP2018112188A
Publication Date:
December 19, 2019
Filing Date:
June 12, 2018
Export Citation:
Assignee:
FUJIKURA LTD
International Classes:
C03B37/018
Attorney, Agent or Firm:
Sumio Tanai
Mitsunaga Igarashi
Toshio Komuro
Yuichiro Shimizu
Mitsunaga Igarashi
Toshio Komuro
Yuichiro Shimizu