Process for producing a low-attenuation optical fiber
US7908888B2 · kind B2 · utility
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3References
14Claims
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Key dates
| Filing date | Dec 24, 2003 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Nov 27, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing a low-attenuation optical fiber by producing a soot core preform by chemical deposition on a substrate; removing the substrate from the soot core preform, thereby forming a central hole along the soot preform; drying and consolidating the soot core preform in a consolidation furnace to form a glass core preform; heating the glass preform in the consolidation furnace above a glass melting temperature to produce a reduction of the diameter of the central hole; and stretching the glass core preform to completely close the central hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.