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LD端面泵浦Tm:SrF2电光调Q激光器

吴广 张振 王韬 季来林 崔勇 高妍琦 隋展

吴广, 张振, 王韬, 等. LD端面泵浦Tm:SrF2电光调Q激光器[J]. 强激光与粒子束, 2024, 36: 061005. doi: 10.11884/HPLPB202436.230140
引用本文: 吴广, 张振, 王韬, 等. LD端面泵浦Tm:SrF2电光调Q激光器[J]. 强激光与粒子束, 2024, 36: 061005. doi: 10.11884/HPLPB202436.230140
Wu Guang, Zhang Zhen, Wang Tao, et al. Laser-diode end-pumped electro-optic Q-switched Tm:SrF2 laser[J]. High Power Laser and Particle Beams, 2024, 36: 061005. doi: 10.11884/HPLPB202436.230140
Citation: Wu Guang, Zhang Zhen, Wang Tao, et al. Laser-diode end-pumped electro-optic Q-switched Tm:SrF2 laser[J]. High Power Laser and Particle Beams, 2024, 36: 061005. doi: 10.11884/HPLPB202436.230140

LD端面泵浦Tm:SrF2电光调Q激光器

doi: 10.11884/HPLPB202436.230140
详细信息
    作者简介:

    吴 广,wg1553480@163.com

    通讯作者:

    季来林,jsycjll@siom.ac.cn

    高妍琦,liufenggyq@siom.ac.cn

  • 中图分类号: TN248.1

Laser-diode end-pumped electro-optic Q-switched Tm:SrF2 laser

  • 摘要: 高掺杂浓度的Tm3+增益介质能通过交叉弛豫过程提高激光器的量子效率,但同时也会增加能量上转换带来的损耗,从而限制激光器效率的进一步提升。对Tm:SrF2晶体的荧光特性以及激光性能展开研究。在激光二极管(LD)端面泵浦下,实现最大功率2.99 W的自由运转输出,激光器的泵浦阈值为0.89 W,中心波长1851 nm,斜效率高达82.1%。采用KTP电光调Q开关演示了Tm:SrF2激光器的电光调Q输出特性。在500 Hz重复频率下,获得了1.02 mJ的最大单脉冲能量,泵浦阈值为2.01 W,最短脉冲宽度为45 ns,对应峰值功率为22.67 kW。实验结果表明,基于LD泵浦的Tm:SrF2激光器具有非常高的效率,有望成为中红外光学参量振荡器(OPO)和光学参量放大器(OPA)的理想泵浦源。
  • 图  1  Tm:SrF2晶体荧光特性

    Figure  1.  Fluorescence characteristics of Tm:SrF2 crystal

    图  2  Tm:SrF2电光调Q激光器装置图

    Figure  2.  Schematic diagram of electro-optical Q-switched Tm:SrF2 laser

    图  3  谐振腔不同位置处的横模光斑半径

    Figure  3.  Transverse mode spot radius at different positions of the resonant cavity

    图  4  激光器脉冲宽度与腔长的关系

    Figure  4.  Relationship between laser pulse width and cavity length

    图  5  Tm:SrF2激光器自由运转输出特性

    Figure  5.  Output characteristics of free running Tm:SrF2 laser

    图  6  Tm:SrF2激光器电光调Q输出特性

    Figure  6.  Output characteristics of electro-optic Q-switched Tm:SrF2 laser

    表  1  掺Tm块状晶体的激光性能

    Table  1.   Laser performance of Tm-doped bulk crystals

    material doping concentration/% output power/W slope efficiency/% photon quantum efficiency reference
    Tm:YAG 3.5 25.40 41.2 1.05 [6]
    Tm:YAP 3.0 6.35 60.4 1.51 [7]
    Tm:YLF 2.5 8.50 53.4 1.23 [8]
    Tm:LuAG 3.5 3.70 54.6 1.39 [9]
    Tm:SrF2 5.2 0.24 50.0 1.28 [10]
    Tm:CaF2 3.0 2.71 70.3 1.68 [18]
    Tm:SrF2 2.0 2.99 82.1 1.92 this paper
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出版历程
  • 收稿日期:  2023-05-19
  • 修回日期:  2024-01-04
  • 录用日期:  2024-01-04
  • 网络出版日期:  2024-01-29
  • 刊出日期:  2024-05-11

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