Wu Duanduan, Guo Zhenrong, Peng Jian, Weng Jian, Cai Zhiping, Xu Huiying
Appl Opt. 2018 Jun 20;57(18):4955-4959. doi: 10.1364/AO.57.004955.
Transition metal dichalcogenides (TMDs) possess a direct bandgap in the visible frequency range and can be applied as attractive visible saturable absorbers (SAs). In this paper, a new TMDs tungsten selenide (WSe)-based red Q-switcher is fabricated and successfully used for Q-switched pulse generation in a red Pr-doped ZBLAN fiber laser. The passive Q-switching fiber laser at 635.2 nm generates a stable pulse with pulse duration of 504 ns and average output power of 4.91 mW as well as a tunable pulse repetition rate of 131.9-260.4 kHz. Furthermore, the size effect of WSe on the 635 nm passive Q-switching output performance is also investigated. Our work will provide certain significance for the optimization of passive Q-switching red fiber lasers based on TMDs.
过渡金属二硫属化物（TMDs）在可见光频率范围内具有直接带隙，可作为有吸引力的可见饱和吸收体（SAs）应用。本文制备了一种新型基于TMDs硒化钨（WSe）的红色调Q器，并成功用于掺Pr的ZBLAN红色光纤激光器中产生调Q脉冲。在635.2nm处的被动调Q光纤激光器产生了稳定的脉冲，脉冲持续时间为504ns，平均输出功率为4.91mW，脉冲重复频率可调，范围为131.9 - 260.4kHz。此外，还研究了WSe的尺寸效应对635nm被动调Q输出性能的影响。我们的工作将为基于TMDs的被动调Q红色光纤激光器的优化提供一定的意义。
