Title:
PRODUCTION OF GLASS PREFORM FOR OPTICAL FIBER AND APPARATUS FOR PRODUCTION
Document Type and Number:
Japanese Patent JP3186572
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a process for efficiently producing a porous glass preform by adjusting the gas discharge of a stage for depositing glass particulates in a process for producing the glass preform for optical fibers by a VAD method and an apparatus for production therefor.
SOLUTION: This process for producing the glass preform for optical fibers comprises depositing a target on the glass particulates synthesized in the flames of burners. The amts. of the respective gases of respective burners are gradually decreased by decreasing displacement in the initial period of production. The displacement is thereafter gradually increased and nearly the specified displacement is maintained at the stationary time. The apparatus for production consists of the burners 1, 2, a pressure tap 3, a discharge pipe 4, a chamber 5, a target rod 6 and a displacement control valve 8.
Inventors:
Yasuhiro Nakashima
Go Ogino
Hideo Hirasawa
Go Ogino
Hideo Hirasawa
Application Number:
JP7546896A
Publication Date:
July 11, 2001
Filing Date:
March 29, 1996
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
G02B6/00; C03B37/014; C03B37/018; (IPC1-7): C03B37/018
Domestic Patent References:
| JP6234539A | ||||
| JP7109133A | ||||
| JP3109221A | ||||
| JP63140036U |
Attorney, Agent or Firm:
Ryoichi Yamamoto (1 person outside)