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<p>A high-energy acousto-optic Q-switched dual-crystal Tm:YAP laser at 1&#xa0;kHz repetition rate was investigated. Using two b-cut Tm:YAP crystals in an L-shaped resonator with laser diode dual-end pumped at 793&#xa0;nm, a pulse energy of 22.31&#xa0;mJ at 1938.86&#xa0;nm with 0.19&#xa0;nm linewidth was achieved, corresponding to a 65 ns pulse width and 343.2&#xa0;kW peak power, with beam quality factor <i>M</i><sup><i>2</i></sup> ~ 3.4. In addition, when the pump power was 137.4&#xa0;W, an average power of 29.96&#xa0;W was obtained in continuous wave mode. To the best of our knowledge, this work represents the highest pulse energy reported of acousto-optic Q-switched Tm:YAP oscillator lasers at 1.94&#xa0;μm.</p>

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22.31 mJ output energy of dual-crystal Tm:YAP laser at 1 kHz repetition rate

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月31日

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  • Xiangyun Gao,
  • Zhenxing He,
  • Ting Yu,
  • Bo Dai

摘要

A high-energy acousto-optic Q-switched dual-crystal Tm:YAP laser at 1 kHz repetition rate was investigated. Using two b-cut Tm:YAP crystals in an L-shaped resonator with laser diode dual-end pumped at 793 nm, a pulse energy of 22.31 mJ at 1938.86 nm with 0.19 nm linewidth was achieved, corresponding to a 65 ns pulse width and 343.2 kW peak power, with beam quality factor M2 ~ 3.4. In addition, when the pump power was 137.4 W, an average power of 29.96 W was obtained in continuous wave mode. To the best of our knowledge, this work represents the highest pulse energy reported of acousto-optic Q-switched Tm:YAP oscillator lasers at 1.94 μm.