Manufacture of depressed index optical fibers
US6715322B2 · kind B2 · utility
1Cited by
8References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 5, 2001 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Jan 24, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2201/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The process time required for fluorine doping of porous silica bodies to produce fluorine doped preforms for the manufacture of depressed index optical fibers is reduced by separating the doping step into a predeposit step, where “excess” fluorine is deposited on the silica particles, and a drive-in step where atomic fluorine is distributed into the silica particles. The drive-in step is conveniently combined with the sintering or consolidation step to further enhance the efficiency of the doping process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.