Invention Grant
- Patent Title: Dehydration-sintering furnace, a manufacturing method of an optical fiber preform utilizing the furnace and an optical fiber preform manufactured by the method
- Patent Title (中): 脱水烧结炉，利用该炉的光纤预制件的制造方法和通过该方法制造的光纤预制件
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Application No.: US11004966Application Date: 2004-12-07
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Publication No.: US07866189B2Publication Date: 2011-01-11
- Inventor: Manabu Saitou , Naritoshi Yamada
- Applicant: Manabu Saitou , Naritoshi Yamada
- Applicant Address: JP Tokyo
- Assignee: Fujikura Ltd.
- Current Assignee: Fujikura Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JPP2003-409068 20031208
- Main IPC: C03B37/075
- IPC: C03B37/075
Abstract:
A dehydration-sintering furnace for dehydrating and/or sintering an optical fiber preform for use in production of an optical fiber includes a muffle for accommodating the optical fiber preform, a heater for heating the muffle, and a pressure fluctuation absorbing apparatus connected to the muffle. Since the pressure fluctuation absorbing apparatus is thermally insulated from a room temperature atmosphere or heated, vapor produced in a dehydration-sintering process is prevented from condensing (liquefying) in a pressure fluctuation absorbing apparatus, thereby preventing reduced dehydration effectiveness in the muffle and reduced quality of the optical fiber preform.
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