发光学报, 2020, 41 (1): 63, 网络出版: 2020-02-24
基于石墨烯量子点的被动调Q Nd∶YVO4激光器
Passively Q-switched Nd∶YVO4 Laser Based on Graphene Quantum Dots
固体激光器 脉冲激光 石墨烯量子点 可饱和吸收体 被动调Q solid state laser pulse laser graphene quantum dots saturable absorber passively Q-switched
摘要
采用水热法制备了石墨烯量子点(GQDs)可饱和吸收体(SA)。对GQDs SA的光学特性进行表征, 估算出其调制深度为6.9%。将GQDs作为SA应用于二极管端面泵浦Nd∶YVO4激光器, 实现了1 063.5 nm处的被动调Q激光输出。在吸收泵浦功率为9.12 W时, 输出脉冲的重复频率为1.64 MHz, 脉冲宽度为 200 ns, 对应的脉冲能量为0.51 μJ, 峰值功率为2.5 W。
Abstract
In this paper, graphene quantum dots (GQDs) saturable absorber (SA) was prepared by hydrothermal method. The optical properties of the GQDs SA was characterized and the modulation depth was calculated to be 6.9%. Using the GQDs SA into diode-end-pumped Nd∶YVO4 laser, a passively Q-switched operation of 1 063.5 nm laser was realized. Pulses as short as 200 ns under a repetition frequency of 1.64 MHz were generated at the absorbed pump power of 9.12 W, implying a pulse energy of 0.51 μJ with the peak power of 2.5 W.
丁蓉, 常建华, 孔春霞, 石少杭, 戴瑞. 基于石墨烯量子点的被动调Q Nd∶YVO4激光器[J]. 发光学报, 2020, 41(1): 63. DING Rong, CHANG Jian-hua, KONG Chun-xia, SHI Shao-hang, DAI Rui. Passively Q-switched Nd∶YVO4 Laser Based on Graphene Quantum Dots[J]. Chinese Journal of Luminescence, 2020, 41(1): 63.