Laser module allowing direct light modulation and laser display employing the same
US7471854B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2007 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Jun 20, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4087
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided are a laser module allowing direct light modulation and a laser display employing the laser module. The laser module may include a semiconductor chip, a Volume Bragg Grating (VBG), a pump laser and a non-linear optical element. The semiconductor chip includes an active layer generating light of primary wavelength and a reflective layer providing the generated light to a cavity and reflecting the light within the cavity. The VBG may output light repeatedly reflected between the reflective layer and the VBG. The non-linear optical element disposed outside a cavity between the semiconductor chip and the VBG may convert the light of a first wavelength emitted from the active layer into light of a second wavelength different from the first wavelength. The laser module having the above-mentioned construction uses an external cavity laser and a non-linear optical element to achieve direct light modulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.