Cascaded second-harmonic and sum-frequency generation of a CO_2 laser by use of a single quasi-phase-matched GaAs crystal
- 1 October 1998
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 23 (19) , 1508-1510
- https://doi.org/10.1364/ol.23.001508
Abstract
Cascaded second-harmonic and sum-frequency generation were used to obtain the third harmonic of a laser in a single quasi-phase-matched GaAs crystal. Both continuous-wave and pulsed regimes with a single-pass configuration were studied. The continuous case confirmed the good capability of the GaAs stack to bear high average power density. In the pulsed regime a 0.66% peak power conversion efficiency was achieved for the third harmonic when the laser was pumping at , in fair agreement with theoretical predictions.
Keywords
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