Photorefractive material
US6670079B1 · kind B1 · utility
13Cited by
4References
8Claims
0Family size
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Key dates
| Filing date | Jun 21, 2000 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Jun 21, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/54
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A photorefractive material provides a high photosensitivity without reduction. The material comprises a single crystal of terbium (Tb)-doped niobate or tantalate. The single crystal is a single crystal of lithium niobate (LiNbO3) whose molar fraction of [Li2O]/([Li2O]+[Nb2O5]) lies in a range of 0.482 to 0.505, or a single crystal of lithium tantalate (LiTaO3) whose molar fraction of [Li2O]/([Li2O]+[Ta2O5]) lies in a range of 0.482 to 0.505. The amount of terbium added in the photorefractive material ranges from 10 weight ppm to 1000 weight ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.