Abstract
Developing new saturable absorbers for use in the mid-infrared region has practical significance for short-pulsed lasers and related scientific and industrial applications. The performance of gold nanorods (GNRs) as saturable absorbers at novel mid-infrared wavelengths needs to be evaluated even though these benefit from ultrafast nonlinear responses and broadband saturable absorption. Passive Q-switching of an LD-pumped 2.3 µm Tm:YLF laser using GNRs was successfully realized in this study. Pulses with an 843 ns pulse width and a 6.67 kHz repetition rate were achieved using this Q-switched laser. Results showed that GNRs provide promising passive Q-switches for 2.3 µm Tm-doped lasers.
摘要
探索新型中红外波段饱和吸收体材料, 评价其在特定波段的激光脉冲产生性能是激光技术领域的重要研究方向, 对新波段短脉冲激光产生及其相关的科学和工业应用具有重要意义. 金纳米棒具备超快的非线性响应和宽带可饱和吸收特性, 其作为新颖中红外波段可饱和吸收体的性能需要研究与评价. 本文成功实现基于金纳米棒饱和吸收体的2.3 μm LD泵浦Tm:YLF激光器的被动调Q运转, 获得脉冲宽度为843 ns、 重复频率为6.67 kHz的脉冲输出. 结果表明, 金纳米棒可以作为2.3 μm 掺铥激光器有潜力的被动调Q开关材料.
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Hai-tao HUANG designed the research. Fu-yan WU and Shi-qiang WANG performed the experiment. Fu-yan WU drafted the manuscript. Hai-wei CHEN helped organize the manuscript. Hai-tao HUANG revised and finalized the paper.
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Fu-yan WU, Shi-qiang WANG, Hai-wei CHEN, and Hai-tao HUANG declare that they have no conflict of interest.
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Project supported by the National Natural Science Foundation of China (Nos. 61875077 and 61911530131) and the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No. 18KJA510001)
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Wu, Fy., Wang, Sq., Chen, Hw. et al. 2.3 µm nanosecond passive Q-switching of an LD-pumped Tm:YLF laser using gold nanorods as a saturable absorber. Front Inform Technol Electron Eng 22, 312–317 (2021). https://doi.org/10.1631/FITEE.2000110
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DOI: https://doi.org/10.1631/FITEE.2000110