Method of manufacturing an optical fiber using a preform obtained by collapsing a tube
US4869743A · kind A · utility
5Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1988 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Sep 29, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B23/076
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In order to manufacture a fiber by drawing a preform, said preform is made by collapsing a thick-walled silica tube having a reduced pressure established therein and heated in successive passes. The tube is prevented from ovalizing by beginning each pass with a portion bearing against a coaxial internal conical guide. The invention is applicable to low cost fiber manufacture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.