Apparatus and method for coupling light to a thin film optical waveguide
US7151738B2 · kind B2 · utility
11Cited by
9References
18Claims
0Family size
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Key dates
| Filing date | Nov 20, 2003 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Aug 4, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical waveguide comprises a core guiding layer; a cladding layer positioned adjacent to the core guiding layer; a reflective layer positioned adjacent to the cladding layer; and a grating for coupling light into the core guiding layer; wherein the cladding layer has a thickness such that a ray reflected from the reflective layer is phase matched to an incident ray at the grating. A method of coupling electromagnetic radiation into the optical waveguide is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.