A mode-locked Thulium-Holmium doped fiber laser (THDFL) with a Germanium Selenide (GeSe) saturable absorber (SA) is demonstrated for operation in the $2.0~\mu \text{m}$ wavelength region. The SA device is fabricated by drop-casting the GeSe onto an arc-shaped fiber which is then incorporated into the THDFL to induce mode-locked pulses. Stable mode-locking is attained at 1908.78 nm, with pulse duration of 1.67 ps and output power of 2.74 mW at a maximum pump power of 476 mW. The results of this work show that the GeSe can be a viable alternative for ultrafast photonics applications in the $2.0~\mu \text{m}$ . region.

中文翻译：

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用于铥/钬光纤激光器锁模的GeSe渐逝场可饱和吸收体

具有硒化锗 (GeSe) 可饱和吸收体 (SA) 的锁模铥掺杂光纤激光器 (THDFL) 被证明可在 $2.0~\mu \text{m}$ 波长区域。SA 器件是通过将 GeSe 滴铸到弧形光纤上来制造的，然后将其合并到 THDFL 中以诱导锁模脉冲。在 1908.78 nm 处实现了稳定的锁模，脉冲持续时间为 1.67 ps，输出功率为 2.74 mW，最大泵浦功率为 476 mW。这项工作的结果表明，GeSe 可以成为超快光子学应用的可行替代方案。 $2.0~\mu \text{m}$ . 地区。