Method for the production of glass preform for optical fibers
US4586943A · kind A · utility
23Cited by
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15Claims
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Key dates
| Filing date | Oct 16, 1984 |
| Grant date | May 6, 1986 |
| Priority date | — |
| Expiry date | Oct 16, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for producing a glass preform for optical fibers by heating a glass soot preform consisting of glass fine particles made mainly of silicon oxide, which method comprises the steps of: PA0 (1) heating the glass soot preform to dehydrate and to remove impurities therefrom; PA0 (2) heating the glass soot preform in a gas atmosphere containing at least fluorine or fluorine-based compound to add fluorine to the glass soot preform; and PA0 (3) heating the glass soot preform to make it transparent, from the transparent preform prepared by which method, an optical fiber having superior transmission characteristics can be prepared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.