Optical fiber fabrication by a plasma generator
US4331462A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1980 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | Apr 25, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Optical fiber preforms are produced by means of a duplex hot zone, a section of which is defined by an r.f. generated plasma fire ball. The process operates within a tube with gaseous precursor material reacting within the hot zone to result in deposited material of the desired preform glass composition. A "smoothing" region within the hot zone is defined by tube surface at a temperature sufficiently elevated to consolidate any particulate material resulting from reaction. In some aspects, the disclosed procedures may be regarded as Modified Chemical Vapor Deposition. Commercial significance resides in significantly increased throughput of preforms and, consequently, in fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.