Eye-safe Q-switched short pulse fiber laser
US8320417B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2011 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Feb 7, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/09415
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser includes a pump source that provides pump energy at a first wavelength and a laser cavity. The laser cavity includes a laser gain medium that receives the pump energy from the pump source and creates gain at a second wavelength different from the first wavelength, and a mode stripping portion coupled to the laser gain medium. The mode stripping portion causes the laser cavity to have a low Fresnel number so as to allow only the lowest-order fiber mode to resonate in the laser cavity. Higher-order fiber modes are discriminated against so as to generate a laser output having a substantially diffraction limited beam in a single transverse mode at the second wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.