Fibre grating optical waveguide device
US6766079B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Jan 2, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Mar 9, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C25/106
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a fiber grating filter optical waveguide device, comprising an optical fiber consisting essentially of silica, whereby said optical fiber has an area with a diffractive grating region and wherein said area with a diffractive grating region is covered with a material having a negative thermal expansion coefficient &agr; satisfying the following equation:&agr;=−(dneff/dT)/neffwherein dneff/dT is the thermo-optic coefficient of the fiber material and neff is the effective refractive index. Furthermore, the present invention provides a method of manufacturing such a device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.