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<p>We reported an efficient continuous-wave (CW) and acousto-optically (AO) Q-switched Tm: LuAG laser at 2&#xa0;μm in-band pumped by a 1.7-µm laser diode for the first time. A maximum CW output power of 7.26&#xa0;W at 2013&#xa0;nm was achieved with an incident pump power of 28.2&#xa0;W, corresponding to a slope efficiency of 38.5% and optical efficiency of 25.6%. With a repetition rate of 1&#xa0;kHz, a maximum pulse energy of 5.63&#xa0;mJ and a minimum pulse width of 77 ns were achieved under AO Q-switching regime, corresponding to a calculating peak power of 73.1&#xa0;kW. Moreover, the M<sup>2</sup>-factors in x- and y-directions were measured to be about 1.9 and 1.7 at maximum output power, respectively.</p>

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Efficient acousto-optically Q-switched Tm: LuAG laser end-pumped by a laser diode at 1.7 μm

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • Wensheng Zhang,
  • Linjun Li,
  • Hong Liang

摘要

We reported an efficient continuous-wave (CW) and acousto-optically (AO) Q-switched Tm: LuAG laser at 2 μm in-band pumped by a 1.7-µm laser diode for the first time. A maximum CW output power of 7.26 W at 2013 nm was achieved with an incident pump power of 28.2 W, corresponding to a slope efficiency of 38.5% and optical efficiency of 25.6%. With a repetition rate of 1 kHz, a maximum pulse energy of 5.63 mJ and a minimum pulse width of 77 ns were achieved under AO Q-switching regime, corresponding to a calculating peak power of 73.1 kW. Moreover, the M2-factors in x- and y-directions were measured to be about 1.9 and 1.7 at maximum output power, respectively.