Second and third harmonic generation from simultaneous high peak- and high average-power thin disk laser
Ugo Andral, Pierre Walch, Victor Moreno, Bernard Mahieu, Thomas Produit, Magali Lozano, Laurent Bizet, Clemens Herkommer, M. Moret, Y.-B. André, P. Krötz, Thomas A. Metzger, Knut Michel, A. Mysyrowicz, Jérôme Kasparian, Dominique Lupinski, Aurélien Houard, Jean‐Pierre Wolf
Abstract
Abstract We report Second Harmonic Generation (SHG) and Third Harmonic Generation (THG) energy conversion efficiencies up to 59% and 27%, respectively, for laser pulses simultaneously delivering high peak power in the sub-TW range and average powers in the sub-kW range. No damage or efficiency decrease is observed after more than 100 h operation time. The resulting high-energy visible and near-UV pulses are suitable for applications, such as lightning control, material analysis and machining, or OPCPA pumping.