Light emitting devices with phosphosilicate glass
US8270445B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2008 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Jul 15, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/176
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light-emitting device is provided which includes a gain medium having an optically-active phosphosilicate glass, wherein the phosphosilicate glass includes at least one active ion dopant and from about 1 to 30 mol % of phosphorus oxide. The phosphorous oxide may be present in an effective amount for reducing any photodarkening effect and increasing the saturation energy of the system. The active ion dopant may be a rare earth dopant. The light-emitting device may include an optical waveguide, the optical waveguide including the gain medium. The optical waveguide may have a core and at least one cladding, and the gain medium having the phosphosilicate glass may be found in the core and/or in one of the cladding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.