Low phonon energy gain medium and related active devices
US7003981B2 · kind B2 · utility
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Key dates
| Filing date | Oct 1, 2002 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Dec 31, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/901
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Using sol-gel techniques, an optical gain medium has been fabricated comprising a glass ceramic host material that includes clusters of crystalline oxide material, especially tin oxide, and that is doped with active ions concentrated at the clusters. The active ions are preferentially located at the nanoclusters so that they experience the relatively low phonon energy of the oxide and are insensitive to the phonon energy of the host. A host with a high phonon energy, such as silica, can therefore be used without the usual drawback of reduced carrier lifetimes through enhanced nonradiative decay rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.