A single-frequency pulsed holmium-doped yttrium lithium fluoride (Ho:YLF) amplifier pumped by a Tm-doped fiber laser was demonstrated. The seed was an injection-seeded Q-switched Ho:YLF laser. The output energy from the single-frequency pulsed amplifier was 24.2 mJ, with a pulse width of 250 ns at a pulse repetition frequency (PRF) of 100 Hz. The energy stability during 30 min was improved to 1% after the single-frequency pulsed Ho:YLF laser was amplified. The line width of the single-frequency pulsed spectrum of the Ho:YLF amplifier was 2.81 MHz. The single-frequency pulsed Ho:YLF amplifier can be applied to differential absorption lidar (DIAL), since its output spectrum is around the P12 CO2 absorption line.

中文翻译：

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单通脉冲 Ho:YLF 放大器的单频和自由运行

演示了由掺铥光纤激光器泵浦的单频脉冲掺钬氟化钇锂 (Ho:YLF) 放大器。种子是注射种子问-切换的 Ho:YLF 激光器。单频脉冲放大器的输出能量为 24.2 mJ，脉冲宽度为 250 ns，脉冲重复频率 (PRF) 为 100 Hz。单频脉冲 Ho:YLF 激光放大后 30 min 内的能量稳定性提高到 1%。Ho:YLF放大器的单频脉冲谱线宽为2.81 MHz。单频脉冲 Ho:YLF 放大器可应用于差分吸收激光雷达 (DIAL)，因为它的输出光谱在 P12 CO 附近2吸收线。