Abstract
Topological insulator Sb2Te3 has the advantage of broadband saturable absorption from the visible to the infrared bands. Herein, the two-dimensional material Sb2Te3 saturable absorber (SA) of the topological insulator family was first applied experimentally in a wideband tunable passively Q-switched Yb-doped fiber laser. High-quality Sb2Te3 crystals were synthesized by the flux zone method. The Sb2Te3 SA with fewer layers was further prepared via a modified mechanical exfoliation procedure. Meanwhile, stable wavelength-tunable passive Q-switching pulse operation was obtained in a Yb-doped fiber ring cavity based on the Sb2Te3 SA, where the central wavelength can be continuously tuned from 1040.89 to 1092.85 nm. Results suggest that Sb2Te3 has wideband saturable absorption properties, and that the tunable pulse laser can provide a convenient and simple source for practical applications.
摘要
拓扑绝缘体Sb2Te3具有从可见光到红外波段的宽谱可饱和吸收的优点. 在本研究中, 首先将拓扑绝缘体家族中的二维材料Sb2Te3可饱和吸收体应用在宽谱可调谐被动调Q掺镱光纤激光器中. 高质量的Sb2Te3晶体通过选区熔炼法合成, 进一步通过改进的机械剥离方法制备少层Sb2Te3可饱和吸收体. 基于此可饱和吸收体, 在掺镱光纤环形腔中获得稳定的波长可调谐被动调Q脉冲, 其中心波长可从1040.89 nm连续调节到1092.85 nm. 实验结果表明, Sb2Te3具有宽谱可饱和吸收特性, 这个波长可调谐脉冲激光可以为实际应用提供一个方便简单的光源.
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Jian WU, Kai ZHANG, and Pu ZHOU conceived and designed the research. Tao WANG, Qiang YU, Kun GUO, Xinyao SHI, Yijun XU, and Xuefen KAN performed the experiments. Tao WANG and Qiang YU analyzed the data and drafted the manuscript. Jian WU, Kai ZHANG, and Pu ZHOU helped organize the manuscript. Tao WANG, Qiang YU, Xinyao SHI, Jian WU, Kai ZHANG, and Pu ZHOU revised and finalized the manuscript.
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Tao WANG, Qiang YU, Kun GUO, Xinyao SHI, Xuefen KAN, Yijun XU, Jian WU, Kai ZHANG, and Pu ZHOU declare that they have no conflict of interest.
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Project supported by the National Natural Science Foundation of China (Nos. 61875223 and 61801472), the Hunan Province Key Area Research and Development Plan (No. 2019GK2181), the Hunan Provincial Innovation Project (No. 2019RS3017), and the Postgraduate Research & Practice Innovation Program of Jiangsu Province, China (Nos. B200203143 and KYCX20_0433)
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Wang, T., Yu, Q., Guo, K. et al. Sb2Te3 topological insulator for 52 nm wideband tunable Yb-doped passively Q-switched fiber laser. Front Inform Technol Electron Eng 22, 287–295 (2021). https://doi.org/10.1631/FITEE.2000577
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DOI: https://doi.org/10.1631/FITEE.2000577