Dehydration-sintering furnace, a manufacturing method of an optical fiber preform utilizing the furnace and an optical fiber preform manufactured by the method
US7866189B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2004 |
| Grant date | Jan 11, 2011 |
| Priority date | — |
| Expiry date | Sep 21, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B37/0146
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.