Diode end-pumped high-power Q-switched double Nd:YAG slab laser and its efficient near-field second-harmonic generation

摘要

We reported on an all-solid-state double Nd:YAG slab laser. The laser was based on two diode end-pumpednNd:YAG slabs and a stable–unstable hybrid resonator. A cw output of 189 W and an average Q-switchednoutput of 169 W at 10 kHz with an M2 factor of 1.5 in the slow direction and 1.7 in the fast direction werenobtained. We demonstrated efficient near-field frequency doubling by imaging the one-dimensional top-hatnnear-field to a lithium triborate frequency doubler. We obtained 93 W green light at 10 kHz with a pulsenwidth of 10.7 ns. The efficiency of second-harmonic generation was up to 57%. © 2008 Optical Society ofnAmerica