Laser sensor for self-mixing interferometry having a vertical external cavity surface emission laser (VECSEL) as the light source
US9397476B2 · kind B2 · utility
13Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2008 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Mar 23, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/142
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a laser sensor for self-mixing interferometry. The laser sensor comprises at least one semiconductor laser light source emitting laser radiation and at least one photodetector (6) monitoring the laser radiation of the laser light source. The laser light source is a VECSEL having a gain medium (3) arranged in a layer structure (15) on a front side of a first end mirror (4), said first end mirror (4) forming an external cavity with an external second end mirror (5). The proposed laser sensor provides an increased detection range and can be manufactured in a low-cost production process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.