Creating refractive index changes in glass by up-conversion of rare earth ions
US6762875B2 · kind B2 · utility
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5References
34Claims
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Key dates
| Filing date | Feb 7, 2002 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Nov 21, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S501/905
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for creating refractive index changes in a substrate is provided by irradiating the substrate with infrared (IR) or visible light radiation. Ultra-violet (UV) radiation is generated in the substrate responsive to the IR or visible light radiation such that the change in the refractive index of the substrate is generated responsive to the UV radiation. Preferably, the substrate comprises a glass doped with rare earth ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.