Liu Jingjing, Peng Qianqian, Zhang Cheng, Dong Jiahao, Liu Jie
Opt Express. 2024 Mar 25;32(7):11387-11394. doi: 10.1364/OE.511408.
We reported an intra-cavity pumped Q-switched laser with dual-wavelength synchronous output at 2066.7 nm and 1940nm. Ho:YLF crystal was pumped by a self-Q-switched Tm:YAP laser, which was served as both a gain medium and a saturable absorber simultaneously. For Ho:YLF laser, under 11.4-W incident pump power, a stable pulse laser was achieved at 2066.7 nm with the highest peak power of 69.65 W and the pulse repetition rate of 42.14 kHz. Under the same incident pump power, the highest peak power and pulse repetition rate of Tm:YAP laser were 17.85 W and 50.82 kHz, corresponding to the central wavelength of 1940nm. These results suggested that Q-switching without additional absorber element were effective way to obtain high-efficiency and compact 2.1 µm pulsed laser.
我们报道了一种腔内泵浦的调Q激光器，其在2066.7 nm和1940nm处具有双波长同步输出。Ho:YLF晶体由自调Q的Tm:YAP激光器泵浦，该激光器同时作为增益介质和饱和吸收体。对于Ho:YLF激光器，在11.4W的入射泵浦功率下，在2066.7 nm处获得了稳定的脉冲激光，最高峰值功率为69.65W，脉冲重复频率为42.14kHz。在相同的入射泵浦功率下，Tm:YAP激光器的最高峰值功率和脉冲重复频率分别为17.85W和50.82kHz，对应中心波长为1940nm。这些结果表明，无需额外吸收体元件的调Q是获得高效紧凑的2.1 µm脉冲激光器的有效方法。
