Sol-gel process for fabricating germanium-doped silica article
US6442977B1 · kind B1 · utility
11Cited by
14References
18Claims
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Key dates
| Filing date | Jun 20, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Sep 22, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/901
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sol-gel process for fabricating bulk, germanium-doped silica bodies useful for a variety of applications, including core rods, substrate tubes, immediate overcladding, pumped fiber lasers, and planar waveguides, is provided. The process involves the steps of providing a dispersion of silica particles in an aqueous quaternary ammonium germanate solution—typically tetramethylammonium germanate, gelling the dispersion to provide a gel body, and drying, heat treating, and sintering the body to provide the germanium-doped silica glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.