高重复频率千赫兹电光调Q钬镨共掺钇锂氟化物2.9微米体激光器
High-repetition-rate kHz electro-optically Q-switched Ho, Pr: YLF 2.9 µm bulk laser.
作者信息
Nie Hongkun, Shi Bingnan, Xia Haiping, Hu Jianxu, Zhang Baitao, Yang Kejian, He Jingliang
出版信息
Opt Express. 2018 Dec 24;26(26):33671-33677. doi: 10.1364/OE.26.033671.
In this study, we operated a novel bulk laser: a dual-end-pumped electro-optically (EO) Q-switched Ho, Pr:YLF laser at 2945.9 nm with a repetition rate of kHz level. The shortest pulse duration of 25.2 ns was obtained at the repetition rate of 500 Hz, corresponding to a single pulse energy of 0.4 mJ and a peak power of 15.9 kW. A maximum output power of 268 mW was delivered at the repetition rate of 1.5 kHz. The beam quality factors of the EO Q-switched Ho, Pr:YLF laser at the maximum output power were M = 1.50 and M = 1.54 in x- and y- directions, respectively. The long-term output power instability was measured to be ± 1.5% (RMS) within five hours. The achieved results indicated the promising potential of Ho, Pr: YLF crystals for high repetition rate Q-switched mid-infrared laser pulse generation very well.
在本研究中，我们操作了一种新型的体激光器：一台双端泵浦的电光（EO）调Q Ho，Pr:YLF激光器，波长为2945.9 nm，重复频率处于kHz水平。在500 Hz的重复频率下获得了最短脉冲持续时间25.2 ns，对应单脉冲能量0.4 mJ和峰值功率15.9 kW。在1.5 kHz的重复频率下输出功率最大值为268 mW。该电光调Q Ho，Pr:YLF激光器在最大输出功率时，x方向和y方向的光束质量因子分别为M = 1.50和M = 1.54。测量得到在五小时内长期输出功率不稳定度为± 1.5%（均方根值）。所取得的结果很好地表明了Ho，Pr:YLF晶体在高重复频率调Q中红外激光脉冲产生方面具有广阔的潜力。
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