中国激光, 2020, 47 (11): 1101001, 网络出版: 2020-11-02
基于石墨烯量子点与二硫化钼的双被动调Q激光器研究 下载: 815次
Research on Double Passively Q-Switched Laser Based on Graphene Quantum Dots and Molybdenum Disulfide
激光器 双被动调Q 石墨烯量子点 二硫化钼 全固态激光器 lasers double passively Q-switched graphene quantum dot disulfide molybdenum all-solid-state laser
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.
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. 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.