A single-frequency pulsed 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 the pulse width of 250 ns at the pulse repetition frequency (PRF) of 100 Hz. The energy stability in 30 min was improved to 1% after the single-frequency pulsed Ho:YLF laser was amplified. The linewidth 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 CO<sub>2</sub> absorption line.
Wang Yunpeng, Ju Youlun, Dai tongyu, Yan Dong, Yao Baoquan. Single-frequency and free-running operation of a single-pass pulsed Ho:YLF amplifier[J]. High Power Laser Science and Engineering, , (): .
