Device and method for tuning the wavelength of the light in an external cavity laser
US6597710B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2001 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Aug 17, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/143
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a device and method for tuning the wavelength of the light in an external cavity laser. The external cavity laser comprises an optically amplifying semiconductor chip, a first reflecting surface, an Anti-Reflection (AR) coated semiconductor chip facet, a diffraction grating on which at least part of the beam originating from the AR coated semiconductor chip facet is incident and diffracted back to the optically amplifying semiconductor chip, means for collimating the light emitted from the AR coated semiconductor chip facet towards the diffraction grating, and a movable part. By the movement of the moveable part, the wavelength of the light can be turned in the external cavity laser. The movable part of the external cavity laser exhibits a rotational movement relative to the optical axis of the external movement being actuated by an electrodynamic force generated within an integral section of the moveable part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.