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All-Solid-State Nd:YAG Laser Operating at 1064 nm and 1319 nm under 885 nm Thermally Boosted Pumping

We report a high-efficiency Nd:YAG laser operating at 1064 nm and 1319 nm, respectively, thermally boosted pumped by an all-solid-state Q-switched Ti:sapphire laser at 885 nm. The maximum outputs of 825.4 mW and 459.4 mW, at 1064 nm and 1319 nm respectively, are obtained in a 8-mm-thick 1.1 at. % Nd:YAG crystal with 2.1 W of incident pump power at 885 nm, leading to a high slope efficiency with respect to the absorbed pump power of 68.5% and 42.0%. Comparative results obtained by the traditional pumping at 808 nm are presented, showing that the slope efficiency and the threshold with respect to the absorbed pump power at 1064 nm under the 885 nm pumping are 12.2% higher and 7.3% lower than those of 808 nm pumping. At 1319 nm, the slope efficiency and the threshold with respect to the absorbed pump power under 885 nm pumping are 9.9% higher and 3.5% lower than those of 808 nm pumping. The heat generation operating at 1064 nm and 1319 nm is reduced by 19.8% and 11.1%, respectively.