Abstract
We report a high power and high efficiency double resonant ZnGeP2 (ZGP) optical parametric oscillator (OPO) pumped by a Tm,Ho:GdVO4 laser. We employ a Tm,Ho:GdVO4 laser as the pump source operated at 2.049 μm with M2 = 1.1. The ZGP OPO can generate a total combined output power of 14.1 W at 3.80 μm signal and 4.45 μm idler under pumping power of 28.7 W. The slope efficiency reaches 61.8%, and M2 = 3.6 for OPO output is obtained.
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