Opt Lett. 2023 Jul 1;48(13):3495-3498. doi: 10.1364/OL.496472.
A dual-wavelength passively Q-switched Ho:GdVO self-Raman laser in the 2.5 µm wave band was demonstrated with Cr:ZnS as a saturable absorber. Synchronized dual-wavelength pulsed laser outputs at 2473 nm and 2520 nm were acquired, corresponding to Raman frequency shifts of 808 cm and 883 cm, respectively. The maximum total average output power of 114.9 mW was obtained at an incident pump power of 12.8 W with a pulse repetition rate of 3.57 kHz and a pulse width of 16.36 ns. The maximum total single pulse energy was 32.18 µJ, corresponding to a total peak power of 1.97 kW. The power ratios of the two Raman lasers can be controlled by varying the incident pump power. To the best of our knowledge, this is the first time a dual-wavelength passively Q-switched self-Raman laser in the 2.5 µm wave band has been reported.
我们演示了一种基于 Cr:ZnS 作为可饱和吸收体的 2.5μm 波段双波长被动调 Q Ho:GdVO 自拉曼激光器，获得了同步双波长脉冲激光输出，波长分别为 2473nm 和 2520nm，相应的拉曼频移分别为 808cm 和 883cm。在入射泵浦功率为 12.8W 时，获得了 114.9mW 的最大总平均输出功率，脉冲重复率为 3.57kHz，脉冲宽度为 16.36ns。最大总单脉冲能量为 32.18μJ，相应的总峰值功率为 1.97kW。通过改变入射泵浦功率可以控制两个拉曼激光器的功率比。据我们所知，这是首次在 2.5μm 波段报道双波长被动调 Q 自拉曼激光器。
