Developing new saturable absorbers for use in the mid-infrared region has practical significance for short-pulsed lasers and related scientific and industrial applications. The performance of gold nanorods (GNRs) as saturable absorbers at novel mid-infrared wavelengths needs to be evaluated even though these benefit from ultrafast nonlinear responses and broadband saturable absorption. Passive Q-switching of an LD-pumped 2.3 µm Tm:YLF laser using GNRs was successfully realized in this study. Pulses with an 843 ns pulse width and a 6.67 kHz repetition rate were achieved using this Q-switched laser. Results showed that GNRs provide promising passive Q-switches for 2.3 µm Tm-doped lasers.

开发用于中红外地区的新型可饱和吸收剂对于短脉冲激光器以及相关的科学和工业应用具有实际意义。金纳米棒（GNR）在新型中红外波长下作为可饱和吸收剂的性能需要进行评估，即使这些受益于超快非线性响应和宽带可饱和吸收。在这项研究中，成功​​实现了使用GNR的LD泵浦的2.3 µm Tm：YLF激光器的无源Q开关。使用这种调Q激光器可以实现843 ns的脉冲宽度和6.67 kHz的重复频率。结果表明，GNR为2.3 µm Tm掺杂的激光器提供了有希望的无源Q开关。