摘要
采用电流置换反应成功制备了金纳米笼溶液并首次验证了其在1123 nm处的非线性饱和吸收特性,作为对比,同样制备了MoS2饱和吸收体。分别将金纳米笼和MoS2作为饱和吸收体,实现了中心波长为1123 nm的Nd:YAG激光器的调Q运转。在MoS2为饱和吸收体的调Q激光器中,当泵浦功率为6.81 W时,得到的最大平均输出功率为208 mW,最短脉冲宽度为412 ns,最大脉冲重复率为233 kHz。在金纳米笼为饱和吸收体的调Q激光器中,当泵浦功率为6.04 W时,得到的最大平均输出功率为221 mW,最短脉冲宽度为253 ns,最大脉冲重复率为326 kHz。与MoS2调Q激光器的实验结果相比,金纳米笼调Q激光器获得的输出功率和效率更高,脉冲宽度更窄,重复率更高。结果证明了金纳米笼在近红外波段激光器中用作饱和吸收体的巨大潜力。
Gold nanocages(GNCs)were successfully prepared by seed-mediated method and its nonlinear saturated absorption characteristic at 1123 nm was verified for the first time.As a comparison,a MoS2 saturated absorber was prepared.Based on GNCs and MoS2 as saturable absorber(SA),respectively,passively Q-switched Nd:YAG lasers at 1123 nm were demonstrated.When Q-switched laser with MoS2 as SA,Q-switched pulse with the shortest pulse duration of 412 ns and maximum pulse repetition rate of 233 kHz was achieved under the pump power of 6.81 W with the maximum average output power of 208 mW.When Q-switched laser with GNCs as SA,Q-switched pulse with the shortest pulse duration of 253 ns and maximum pulse repetition rate of 326 kHz was achieved under the pump power of 6.04 W with the maximum average output power of 221 mW.Compared with the experimental results of MoS2 Q-switched laser,the gold nanocage Q-switched laser has higher output power and efficiency,narrower pulse width and higher repetition rate.These results indicate a great potential of the GNCs film as SA in the near-infrared region.
作者
张斌
李颖
刘丙海
Zhang Bin;Li Ying;Liu Binghai(School of Information Science and Engineering,Shandong University,Jinan 250100,China;Shandong Traffic Technician College,Linyi 276021,China)
出处
《红外与激光工程》
EI
CSCD
北大核心
2021年第1期235-240,共6页
Infrared and Laser Engineering
基金
山东省自然科学基金(ZR2019MF043)。
作者简介
第一作者:张斌(1993−),男,博士生,主要从事调Q锁模激光器及拉曼激光器方面的研究。Email:bin-zhang@mail.sdu.edu.cn。
