20.8 W 9.9 mJ 室温紧凑型<styled-content style-type="number">1030</styled-content> nm纳秒激光器

王浩; 杨晶; 李雪鹏; 李晶宇; 樊仲维; 赵天卓; 周易楠; 王小军; 彭钦军

doi:10.11884/HPLPB202537.240444

20.8 W 9.9 mJ 室温紧凑型1030 nm纳秒激光器

doi: 10.11884/HPLPB202537.240444

王浩^{1, 2,},
杨晶^{1, 3, ,},
李雪鹏²,
李晶宇^{1, 2},
樊仲维^{1, 3},
赵天卓¹,
周易楠^{1, 2},
王小军^{1, 2},
彭钦军^{1, 2}

1.
中国科学院大学，北京 100049
2.
中国科学院理化技术研究所固体激光重点实验室，北京 100190
3.
中国科学院空天信息创新研究院，北京 100094

基金项目: 国家重点研发计划项目（2024YFB4608400）

详细信息

作者简介:
王　浩，wanghao190@mails.ucas.ac.cn

通讯作者:
杨　晶，yangjing@mail.ipc.ac.cn。

中图分类号: TN248.1
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- 被引次数: 0
出版历程
- 收稿日期: 2024-12-13
- 修回日期: 2025-04-16
- 录用日期: 2025-03-13
- 网络出版日期: 2025-04-30

20.8 W, 9.9 mJ room-temperature compact 1030 nm nanosecond laser

Wang Hao^{1, 2
,},
Yang Jing^{1, 3
, ,},
Li Xuepeng²,
Li Jingyu^{1, 2},
Fan Zhongwei^{1, 3},
Zhao Tianzhuo¹,
Zhou Yinan^{1, 2},
Wang Xiaojun^{1, 2},
Peng Qinjun^{1, 2}

1.
University of Chinese Academy of Sciences, Beijing 100049, China
2.
Key Lab of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
3.
Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

摘要

摘要: 报道了一种室温下运行的高功率、高光束质量Yb:YAG激光振荡器。该激光器采用了中等掺杂（Yb³⁺ 2.0 at%）的Yb:YAG棒状晶体，并使用准连续输出的光纤耦合模块进行端面泵浦，成功研制出具备48 W高光束质量微秒输出能力的端泵激光器。通过设计优化谐振腔的腔型结构，在100 Hz重复频率下获得了22 W的准连续线偏振微秒激光输出，光光效率达到47.4%，斜效率为53.5%，光束质量M²为1.22。通过优化泵浦光斑尺寸并使用声光调Q模块，实现了20.8 W的纳秒脉冲输出，对应单脉冲能量为9.9 mJ，脉冲宽度为23.9 ns，光束质量M²为1.39。整个激光系统采用紧凑化设计，光学部分尺寸仅为250 mm × 200 mm × 80 mm。
- 端面泵浦 /
- Yb:YAG /
- 准连续 /
- 重复频率 /
- 高光束质量
Abstract: This paper reports on a room-temperature Yb:YAG rod laser with high power and high beam quality. The oscillator utilizes a moderately doped Yb:YAG rod crystal (Yb³⁺ concentration 2.0 at%) and employs quasi-continuous-wave end-pumping. At a repetition rate of 100 Hz, it achieved a 22 W linearly polarized laser output, with a slope efficiency of 53.5% and an optical-to-optical efficiency of 47.4%, while maintaining a beam quality of M² = 1.22. Using acousto-optic Q-switching, the laser produced a 20.8 W pulse output with an energy of 9.9 mJ and a beam quality of M² = 1.39, demonstrating the laser's capability for high-repetition-rate Q-switched pulse output.
- end pump /
- Yb:YAG /
- quasi-continuous /
- repetition rate /
- high beam quality

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图 1 激光模块装置示意图

Figure 1. Schematic diagram of the laser module device

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图 2 不同泵浦功率下，晶体热焦距的实验和仿真的对比

Figure 2. Comparison of experimental and simulated thermal focal lengths of the crystal under different pump power levels

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图 3 Yb:YAG声光调Q振荡器实验装置示意图

Figure 3. Schematic diagram of the Yb:YAG AO Q-switched oscillator

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图 4 Yb:YAG声光调Q振荡器实验装置3D模型渲染图

Figure 4. 3D model rendering of the experimental setup for the Yb:YAG acousto-optic Q-switched oscillator

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图 5 谐振腔基模光斑的直径与热焦距的关系

Figure 5. Relationship between the fundamental mode spot diameter and the thermal focal length in the resonator

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图 6 不同泵浦重复频率下单脉冲输出能量与泵峰值功率的关系。左上角插图：1030 nm激光器在最高能量输出下30 min的能量稳定性测试

Figure 6. Relationship between single-pulse output energy and pump peak power under different pump repetition frequencies. Inset (top-left): 30-minute energy stability test of the 1030-nm laser at maximum output energy

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图 7 不同调Q重复频率和无Q调制时的平均输出功率与泵浦峰值功率的关系

Figure 7. Relationship between average output power and pump peak power under different Q-switching repetition frequencies and in non-Q-switched operation

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图 8 调Q重复频率为10 kHz时，单个泵浦脉冲包络下的Yb:YAG振荡器的脉冲波形。插图：单个ns脉冲的扩展轮廓

Figure 8. Pulse waveform of the Yb:YAG oscillator under a single pump pulse envelope at a Q-switching repetition frequency of 10 kHz. Inset: Expanded profile of a single ns pulse

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图 9 光束质量M²的测量结果，插图为远场光斑形态

Figure 9. Measurement results of the beam quality factor M2, with the inset showing the far-field spot shape

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