Method of making nitrogen-doped graded index optical waveguides
US4203744A · kind A · utility
27Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 2, 1979 |
| Grant date | May 20, 1980 |
| Priority date | — |
| Expiry date | Jan 2, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2203/22
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of forming graded index, nitrogen-doped optical waveguides. A cylindrically-shaped porous preform comprising at least two oxides is initially formed. One of the oxides, which more readily reacts with nitrogen, has a greater concentration near the center of the preform than at the outer portion thereof. The preform is treated with a nitrogen-containing compound to form a porous body having a greater concentration of nitrogen in the central portion thereof. The porous preform is consolidated and drawn into an optical waveguide filament.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.