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

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