1 哈尔滨理工大学测控技术与通信工程学院黑龙江省激光光谱技术及应用重点实验室，黑龙江 哈尔滨 150086
2 哈尔滨工业大学机电工程学院，黑龙江 哈尔滨 150086
介绍了一台2 μm波段的被动调Q（PQS）模式Tm∶YAP激光器。该激光器采取直形腔结构，用输出中心波长为792 nm的激光二极管作为泵浦光源，用新型二维材料黑磷制备的可饱和吸收体作为PQS调制器件。实验结果表明：在连续波模式运转下，当泵浦功率为8.8 W时，Tm∶YAP激光器的输出功率为1.0 W，输出中心波长为1994.8 nm，相应的斜率效率为17.3%；在PQS模式运转下，当泵浦功率为8.8 W时，Tm∶YAP激光器的平均输出功率为0.9 W，输出脉冲宽度为1.3 µs，重复频率为135.8 kHz；当平均输出功率为0.9 W时，Tm∶YAP激光器的输出中心波长为1986.7 nm，相应的斜率效率为14.2%，光束质量因子=1.10、=1.06。
激光器 被动调Q Tm∶YAP激光器 黑磷可饱和吸收体 光束质量因子 激光与光电子学进展
2023, 60(1): 0114006
Author Affiliations
Abstract
1 College of Physical Science and Technology, Heilongjiang University, Harbin 150080, China
2 Heilongjiang Provincial Key Laboratory of Laser Spectroscopy Technology and Application, Harbin University of Science and Technology, Harbin 150080, China
3 School of Data Science and Technology, Heilongjiang University, Harbin 150080, China
MXene V2CTx has great practicability because it is not easy to degrade under ambient conditions. In this paper, a V2CTx saturable absorber (SA) was firstly applied to a passively Q-switched (PQS) laser, to the best of our knowledge. The V2CTx was prepared by the spin-coating method. The linear absorption of the V2CTx in the 1000–2200 nm region and the nonlinear absorption near 2 µm were studied. With the V2CTx, a typical PQS operation at 1.94 µm was realized in a laser. The minimum pulse width produced by the PQS laser was 528 ns, and the peak power, repetition rate, and average output power were 10.06 W, 65.9 kHz, and 350 mW, respectively. Meanwhile, the maximum pulse energy was 6.33 µJ. This work demonstrates that the V2CTx can be used as an effective SA to obtain nanosecond pulses with high peak power and high repetition rate simultaneously.
passive Q-switching MXene V2CTx saturable absorber thulium doping Chinese Optics Letters
2023, 21(2): 021402
