Vertical cavity surface emitting laser device with angular-selective feedback
US9153941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2010 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | May 1, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/203
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a laser device comprising at least one large area VCSEL (101) and at least one optical feedback element (201, 301) providing an angular-selective feedback for laser radiation emitted from the laser. The angular-selective feedback is higher for at least one portion of laser radiation emitted at angles θ>0 to the optical axis (601) of the laser than for laser radiation emitted on said optical axis (601). The invention also refers to a method of stabilizing a laser emission of a large area VCSEL in a desired angular distribution (501, 502). With the proposed device and method, the intensity distribution of a large area VCSEL can be stabilized in a desired shape, for example a ring shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.