In this paper, Q-switched pulses were generated for the first time in a holmium-doped fiber laser (HDFL) incorporating a niobium carbide-polyvinyl alcohol (Nb₂C-PVA) film-based saturable absorber (SA). At a pump power of 285.7 mW, Q-switched pulses were observed with a repetition rate of 20.5 kHz and a minimum pulse width of 4.4 $\mathrm{\mu }$s. The Q-switched spectrum was centered at 2079.5 nm with a 3-dB bandwidth of 5 nm, as well as a signal-to-noise ratio (SNR) of 57 dB. Stability testing was undertaken and no obvious fluctuations in the output were observed, indicating its high stability. The system shows significant potential for various applications such as surgery, free-space optical communications as well as infrared astronomy.

在本文中，在掺有碳化铌-聚乙烯醇（Nb ₂ C-PVA）薄膜可饱和吸收剂（SA）的掺ped光纤激光器（HDFL）中，首次产生了Q开关脉冲。在285.7 mW的泵浦功率下，观察到Q开关脉冲，其重复频率为20.5 kHz，最小脉冲宽度为4.4$\mathrm{\mu }$s。调Q频谱的中心位于2079.5 nm，3 dB带宽为5 nm，信噪比（SNR）为57 dB。进行了稳定性测试，未观察到输出的明显波动，表明其高稳定性。该系统显示出在各种应用中的巨大潜力，例如手术，自由空间光通信以及红外天文学。