Title:
PRODUCTION OF QUARTZ GLASS PREFORM FOR OPTICAL FIBER
Document Type and Number:
Japanese Patent JP3819614
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a preform for a large-sized optical fiber having small ellipticity at a low cost.
SOLUTION: In this production method of a quartz glass preform for an optical fiber, in which a core glass rod for the optical fiber preform is inserted into a quartz glass tube for the optical fiber preform and they are heated in a heating furnace to weld and unify them, the ratio (d/D) of the inner diameter d of the heating furnace to the outer diameter D of the quartz glass preform tube for the preform is set to be in the range of 1.5-2.0.
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Inventors:
Yutaka Watanabe
Toshiyuki Kato
Atsushi Shimada
Masanori Suzuki
Toshiyuki Kato
Atsushi Shimada
Masanori Suzuki
Application Number:
JP31411398A
Publication Date:
September 13, 2006
Filing Date:
October 16, 1998
Export Citation:
Assignee:
Shin-Etsu Quartz Products Co., Ltd.
International Classes:
C03B37/012; G02B6/00; (IPC1-7): C03B37/012; G02B6/00
Domestic Patent References:
| JP7010580A | ||||
| JP1148725A | ||||
| JP8012363A | ||||
| JP62003032A |
Attorney, Agent or Firm:
Heihachi Hattori
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