MCVD optical fiber method with partial removal of substrate tube
US7946134B2 · kind B2 · utility
5Cited by
5References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 27, 2010 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Apr 27, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2203/22
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The specification describes methods for the manufacture of very large optical fiber preforms wherein the core material is produced by MCVD. Previous limitations on preform size inherent in having the MCVD starting tube as part of the preform process are eliminated by removing the MCVD starting tube material from the collapsed MCVD rod by etching or mechanical grinding. Doped overcladding tubes are used to provide the outer segments of the refractive index profile thus making most effective use of the MCVD produced glass and allowing the production of significantly larger MCVD preforms than previously possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.