Method for the manufacture of a quartz glass preform for an optical fiber
US6938443B1 · kind B1 · utility
14Cited by
8References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2000 |
| Grant date | Sep 6, 2005 |
| Priority date | — |
| Expiry date | Feb 3, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2203/22
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for manufacture of a quartz glass preform for an optical fibre consisting of the following steps: preparation of a hollow cylinder made of porous quartz glass which exhibits an inner layer with a doping substance which increases the refractive index of quartz glass and an outer layer surrounding the inner layer, with a lower refractive index, and collapse of the hollow cylinder characterised by collapse of the porous hollow cylinder onto a quartz glass rod containing the doping substance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.