Increasing laser beam power density
US6493148B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 8, 2000 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Nov 8, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/143
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A group of diode lasers emitting beams at a first wavelength is positioned above and below a stack of laser diodes emitting beams at a second wavelength. The first wavelength beams are directed to a dichroic portion of a compound prism and are reflected outwardly. The second wavelength beams are directed to the opposite surface of the dichroic portion but pass through without reflection and so are directed into substantially the same outward plane as the first wavelength beams. The compound prism combines beams of two different wavelengths to achieve a greater power density in the given plane than can be obtained with beams of either wavelength alone. A second stack of dual wavelength laser beams may be concentrated with a second compound prism and the two stacks of laser beams may be combined using an array of interleaved, laterally reversed, identical, angular plates of refractive material so as to alternately overcome the lateral displacement of the beams from the laterally separated stacks of laser diodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.