Laser system with external optical feedback and use of such system in the graphical industry
US7088745B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 5, 2001 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Jul 20, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/2036
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A diode laser system providing a high-power laser beam with good spatial coherence, which can be focused to a small spot size over long distances and which has a good pointing stability. The laser system comprises a laser diode (301) adapted to emit a first light beam, where the first light beam comprises a plurality of spatial modes, selection means (304) adapted to select a predetermined part of the first light beam, and a reflector (306), where the laser diode and the reflector define a cavity and where the reflector is adapted to reflect the selected part of the first light beam back into the laser diode as a second light beam. The laser system is characterised in that the selection means is adapted to select a part of the first light beam corresponding to a spatial mode with a higher mode number than a spatial mode with maximum gain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.