Efficient continuous wave deep ultraviolet Pr3+:LiYF4 laser at 261.3 nm
Abstract
We report continuous wave deep ultraviolet laser operation at 261.3 nm by intracavity frequency doubling of laser diode pumped Pr3+ doped LiYF4 lasers. Using two InGaN laser diodes with a maximum output power of about 1 W each, a 2.9 mm long Pr3+:LiYF4 crystal and a 5 mm long beta-barium-borate crystal, coherent radiation with an output power of 481 mW at 261.3 nm was achieved at an optical-to-optical efficiency of 26.1% with respect to the total pump power. Both, linear and nonlinear losses have been calculated to be approximately 0.6% by using a model for intracavity frequency doubling with focussed Gaussian beams.
- Publication:
-
Applied Physics Letters
- Pub Date:
- October 2011
- DOI:
- 10.1063/1.3657150
- Bibcode:
- 2011ApPhL..99r1103G
- Keywords:
-
- laser cavity resonators;
- lithium compounds;
- optical harmonic generation;
- optical losses;
- optical pumping;
- praseodymium;
- solid lasers;
- yttrium compounds;
- 42.55.Rz;
- 42.60.Da;
- 42.65.Ky;
- 42.79.-e;
- Doped-insulator lasers and other solid state lasers;
- Resonators cavities amplifiers arrays and rings;
- Frequency conversion;
- harmonic generation including higher-order harmonic generation;
- Optical elements devices and systems