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1.中国科学院理化技术研究所 固体激光重点实验室, 北京 100190
2.中国科学院理化技术研究所 功能晶体与激光技术重点实验室, 北京 100190
3.中国科学院大学, 北京 100049
4.齐鲁中科光物理与工程技术研究院, 山东 济南 250000
Published:05 November 2023,
Received:27 July 2023,
Revised:17 August 2023,
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吴健宏,杜仕峰,高昀等.紧凑高效型百瓦级2 μm棒状Tm∶YAG激光器[J].发光学报,2023,44(11):2027-2032.
WU Jianhong,DU Shifeng,GAO Yun,et al.Compact and Efficient Hundred-watt Level 2 μm Rod Tm∶YAG Laser[J].Chinese Journal of Luminescence,2023,44(11):2027-2032.
吴健宏,杜仕峰,高昀等.紧凑高效型百瓦级2 μm棒状Tm∶YAG激光器[J].发光学报,2023,44(11):2027-2032. DOI: 10.37188/CJL.20230174.
WU Jianhong,DU Shifeng,GAO Yun,et al.Compact and Efficient Hundred-watt Level 2 μm Rod Tm∶YAG Laser[J].Chinese Journal of Luminescence,2023,44(11):2027-2032. DOI: 10.37188/CJL.20230174.
报道了一种结构紧凑、高效率、高功率的2 μm棒状Tm∶YAG激光器。通过优化设计三向激光二极管(LD)侧面泵浦激光模块,提高了晶体棒内泵浦光的功率密度。激光谐振腔采用平平腔结构,包含单个激光模块,几何腔长为88 mm,整台激光器结构简单、紧凑且体积小。激光模块通过一个水冷机进行冷却,在冷却温度为12 ℃条件下,获得了最高功率为119 W、波长为2.02 μm的激光输出,光⁃光转换效率为19.6%,斜率效率达32.7%。该激光器可在最大输出功率下连续稳定运转2 h,功率波动小于1%,晶体端面及光学元件表面不结霜。实验测得
x
和
y
方向的光束质量因子分别为21.01和21.68。这种紧凑、可靠、高效的百瓦级2 μm激光器对于医疗和科学研究等应用具有重要意义。
We report a compact, high-efficiency, and high-power 2 μm rod-type Tm∶YAG laser. By optimizing the design of the threefold laser diode (LD) side-pumped laser module structure, the pump power density inside the crystal rod was increased. The laser resonator adopted a flat-flat cavity configuration, incorporating a single laser module, with a geometric cavity length of 88 mm and the complete laser structure was simple and compact with small footprint. The laser module was cooled by a water chiller, under a crystal cooling temperature of 12 ℃, we obtained a maximum output power of 119 W at a wavelength of 2.02 μm, with an optical-to-optical efficiency of 19.6% and a slope efficiency of 32.7%. The laser can operate stably for 2 hours at maximum output power with power fluctuations below 1%, and no water condensation was observed on the crystal end faces and optical element surfaces. The measured beam quality factors in the
x
and
y
directions were 21.01 and 21.68, respectively. This compact, reliable, and efficient hundred-watt level 2 μm laser is of great significance for applications in medical and scientific research.
激光器Tm∶YAG棒状晶体LD侧面泵浦2 μm结构紧凑
lasersTm∶YAGrod crystalLD side-pumping2 μmcompact structure
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