A dataset of laser performance of high repetition frequency on a 970 nm LD side-pumped Er:YSGG crystal operated at 2.79 μm

We demonstrate the laser performance of high repetition frequency on a 970 nm laser diode (LD) side-pumped Er:YSGG crystal rod with concave end faces. The laser performance under different repetition rates and pulse widths was studied with an optimal cavity length. The maximum average output power of 11.81 W operated at a repetition frequency of 500 Hz and 2.794 μm was achieved, corresponding to the slope efficiency of 10.49%. In addition, the beam quality factors M2x/M2y of 7.01/7.10 and far-field divergences Θx/Θy of 9.15/9.18 mrad were also obtained under the high repetition frequency of 500 Hz. These results show that the LD side-pumped Er:YSGG laser crystal rod with concave end faces has the potential of being operated under high repetition frequency.

本研究针对端面呈凹面的970 nm激光二极管（laser diode, LD）侧面泵浦铒掺杂钇钪镓石榴石（Er:YSGG）晶体棒，开展了高重复频率下的激光性能实验研究。通过优化谐振腔腔长，本研究探究了不同重复频率与脉冲宽度下的激光输出特性。在重复频率为500 Hz、输出波长为2.794 μm的工况下，系统实现了11.81 W的最大平均输出功率，对应的斜率效率为10.49%。此外，在500 Hz的高重复频率工况下，系统同时获得了7.01/7.10的光束质量因子M²ₓ/M²ᵧ，以及9.15/9.18 mrad的远场发散角Θₓ/Θᵧ。上述实验结果表明，端面呈凹面的LD侧面泵浦Er:YSGG晶体棒具备高重复频率运行的应用潜力。