Method of manufacture of optical fiber
US4277270A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1979 |
| Grant date | Jul 7, 1981 |
| Priority date | — |
| Expiry date | Jul 2, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C13/046
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process is disclosed for manufacturing an optical fiber comprising a silica cladding and multi-component glass core wherein a tube made of the cladding material serves as a crucible in which the core glass is melted and fined. The core glass includes silicon dioxide, boron oxide, barium oxide or lead oxide (or a combination of both, and an alkali oxide). The materials are selected to provide a high numerical aperture, rapid melting and stability at the high temperatures required to draw the fiber. In accordance with a further feature of the invention, the batch material for the core is actually melted as it is falling to the bottom of the silica tube, thereby increasing the speed of melting and further facilitating outgassing of effluents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.