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Frontiers of Information Technology & Electronic Engineering
ISSN 2095-9184 (print), ISSN 2095-9230 (online)
2021 Vol.22 No.3 P.287-295
Sb2Te3 topological insulator for 52 nm wideband tunable Yb-doped passively Q-switched fiber laser
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.
Key words: Topological insulator, Sb2Te3, Fiber laser, Passive Q-switching laser, Wavelength-tunable laser
1国防科技大学前沿交叉学科学院，中国长沙市，410073
2中国科学院纳米技术与纳米仿生研究所，中国苏州市，215123
3河海大学江苏省输配电设备技术重点实验室，中国常州市，213022
4中国科学院纳米技术与仿生研究所纳米器件与应用重点实验室，中国苏州市，215123
5中国科学院纳米技术与纳米仿生研究所真空互连纳米技术工作站，中国苏州市，215123
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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DOI:
10.1631/FITEE.2000577
CLC number:
TB3
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On-line Access:
2021-03-08
Received:
2020-10-26
Revision Accepted:
2020-12-23
Crosschecked:
2021-01-22