Method and apparatus for fabricating an oval cross-sectional optical waveguide
US5366530A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Apr 13, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2203/30
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention concerns the method and apparatus to fabricate an oval cross-sectional optical waveguide which only allows light to propagate in one direction of polarization. The optical waveguide preform for such an optical waveguide according to the modified chemical vapor deposition (MCVD) process is produced in such a way, that cooling is used to provide the substrate tube with an oval or elliptical temperature cooling profile. The apparatus for carrying out the fabrication method includes a cooling device (5) mounted to a support (3) beside a gas burner (4) and consists of two nozzles (10) directed toward the substrate tube (2) so as to direct cooling gas toward the substrate tube as glass layers are deposited thereon to produce core and cladding of the optical waveguide. The nozzles rotate synchronously with the substrate tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.