Mirror structure and laser device comprising such a mirror structure
US7778305B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2006 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Jun 7, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/166
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
For increasing the power emitted by surface emitting lasers and for improving the spatial coherence of the laser beam, emitted in particular by disk lasers, microchip lasers and VCSELs having a relatively wide emitting area, the invention proposes to select a low order transverse cavity mode by means of a mirror structure (12) of high reflectivity, and of high angular selectivity. The mirror structure comprises a multilayer (14) receiving the optical beam (24) and a resonant grating mirror (16) following the multilayer and arranged for highly reflecting the optical beam in a narrow angular range at each side of a determined incidence angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.