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基于石墨烯量子点与二硫化钼的双被动调Q激光器研究

Research on Double Passively Q-Switched Laser Based on Graphene Quantum Dots and Molybdenum Disulfide

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摘要

为获得脉冲宽度窄、波形对称性好、输出性能稳定的脉冲激光,设计了一种基于石墨烯量子点与二硫化钼的1064 nm双被动调Q激光器。该激光器采用结构简单的线形腔结构,以808 nm LD为抽运源、Nd∶YVO4为增益介质。分别采用水热法和锂离子-插层法获得了石墨烯量子点溶液与二硫化钼溶液。经旋涂、烘干等工艺制备出可饱和吸收体,作为被动调Q器件。相比于单被动调Q激光器,双被动调Q激光器输出的激光脉冲宽度更窄、脉冲波形对称性更好。当抽运功率为12.9 W时,实验测到的调Q激光脉冲宽度为180 ns,重复频率为1085 kHz,信噪比为44 dB,平均输出功率为595 mW。

Abstract

In order to obtain pulse lasers with narrow pulse width, good waveform symmetry, and stable output performance, a 1064 nm double passively Q-switched laser based on graphene quantum dots and molybdenum disulfide was designed. The laser used a simple linear cavity structure, with 808 nm LD as the pump source and Nd∶YVO4 as the gain medium. Graphene quantum dots and molybdenum disulfide were obtained by hydrothermal method and lithium-ion intercalation method respectively. Saturable absorbers were prepared through spin coating and drying process, which were used as passively Q-switched devices. Compared with the single passively Q-switched laser, the output pulse width of the double passively Q-switched laser was narrower and the pulse waveform symmetry was better. When the pump power was 12.9 W, the pulse width of Q-switched laser was 180 ns, the repetition rate was 1085 kHz, the signal-to-noise ratio was 44 dB, and the average output power was 595 mW.

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中图分类号:TN242

DOI:10.3788/CJL202047.1101001

所属栏目:激光器件与激光物理

基金项目:国家自然科学基金、江苏省研究生科研与实践创新计划、江苏省高等学校大学生创新创业训练计划;

收稿日期:2020-05-13

修改稿日期:2020-06-15

网络出版日期:2020-11-01

作者单位    点击查看

刘海洋:南京信息工程大学电子与信息工程学院, 江苏 南京 210044
常建华:南京信息工程大学电子与信息工程学院, 江苏 南京 210044
冯潇潇:南京信息工程大学电子与信息工程学院, 江苏 南京 210044
戴腾飞:南京信息工程大学电子与信息工程学院, 江苏 南京 210044
石少杭:南京信息工程大学电子与信息工程学院, 江苏 南京 210044
戴瑞:南京信息工程大学电子与信息工程学院, 江苏 南京 210044
刘俊彤:南京信息工程大学电子与信息工程学院, 江苏 南京 210044

联系人作者:常建华(jianhuachang@nuist.edu.cn)

备注:国家自然科学基金、江苏省研究生科研与实践创新计划、江苏省高等学校大学生创新创业训练计划;

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引用该论文

Liu Haiyang,Chang Jianhua,Feng Xiaoxiao,Dai Tengfei,Shi Shaohang,Dai Rui,Liu Juntong. Research on Double Passively Q-Switched Laser Based on Graphene Quantum Dots and Molybdenum Disulfide[J]. Chinese Journal of Lasers, 2020, 47(11): 1101001

刘海洋,常建华,冯潇潇,戴腾飞,石少杭,戴瑞,刘俊彤. 基于石墨烯量子点与二硫化钼的双被动调Q激光器研究[J]. 中国激光, 2020, 47(11): 1101001

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