We demonstrate the generation of Q-switching pulse train in thulium-doped fiber laser (TDFL) cavity by employing titanium-based saturable absorber (Ti-SA). The Ti-SA was fabricated by depositing titanium particles molecules using electron beam evaporation on the surface of a polyvinyl alcohol (PVA) film. Subsequently, stable Q-switched pulses were obtained within the 1,552 nm pump power range from 272.1 to 467 mW, with repetition rate tuned from 21.8 to 39.1 kHz. At the maximum pump power, the TDFL showed that the pulse duration of 2.22 μs and the maximum pulse energy of 124 nJ.

中文翻译：

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带有纯钛膜可饱和吸收体的Q开关掺-光纤激光器

我们通过使用钛基可饱和吸收体（Ti-SA）演示了掺th光纤激光器（TDFL）腔中Q开关脉冲序列的产生。通过使用电子束蒸发将钛颗粒分子沉积在聚乙烯醇（PVA）膜的表面上来制造Ti-SA。随后，在从272.1到467 mW的1,552 nm泵浦功率范围内获得了稳定的Q开关脉冲，重复率从21.8调整到39.1 kHz。在最大泵浦功率下，TDFL显示脉冲持续时间为2.22μs，最大脉冲能量为124 nJ。