中国物理B ›› 2026, Vol. 35 ›› Issue (3): 34202-034202.doi: 10.1088/1674-1056/adf4ac

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A high-power dual-crystal Tm:YLF laser with 80.9% slope efficiency

Yinfei Liu(刘寅飞)1,2, Jiajun Song(宋贾俊)1,†, Yujie Peng(彭宇杰)1,3,‡, Guanguang Gao(高贯光)1, Liya Shen(沈丽雅)1,4, Junze Zhu(朱君泽)1,2, Tianze Xu(徐天泽)1,2, and Yuxin Leng(冷雨欣)1,3,§   

  1. 1 State Key Laboratory of Ultra-intense laser Science and Technology, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China;
    2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 School of Physics and Optoelectronic Engineering, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China;
    4 School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
  • 收稿日期:2025-04-21 修回日期:2025-06-10 接受日期:2025-07-28 出版日期:2026-02-11 发布日期:2026-03-05
  • 通讯作者: Jiajun Song, Yujie Peng, Yuxin Leng E-mail:songjiajun@siom.ac.cn;yjpeng@siom.ac.cn;lengyuxin@siom.ac.cn
  • 基金资助:
    Project supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Nos. XDA0380205 and XDB0890101), the National Key Research and Development Program of China (Grant No. 2022YFA1604400), the National Natural Science Foundation of China (Grant Nos. 12388102, 62205351, 61925507, 62075227, 22227901, U21A20138, and 62375273), Shanghai Rising-Star Program (Grant No. 21QA1410200), the Fund from Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No. 2020248), the Fund from Shanghai Association for Science and Technology (Grant Nos. 22DZ1100300, 22560780100, and 23560750200), China Postdoctoral Science Foundation (Grant No. GZC20232817), and Shenzhen Major Scientific and Technological Projects (Grant No. KJZD20240903100205008).

A high-power dual-crystal Tm:YLF laser with 80.9% slope efficiency

Yinfei Liu(刘寅飞)1,2, Jiajun Song(宋贾俊)1,†, Yujie Peng(彭宇杰)1,3,‡, Guanguang Gao(高贯光)1, Liya Shen(沈丽雅)1,4, Junze Zhu(朱君泽)1,2, Tianze Xu(徐天泽)1,2, and Yuxin Leng(冷雨欣)1,3,§   

  1. 1 State Key Laboratory of Ultra-intense laser Science and Technology, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China;
    2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 School of Physics and Optoelectronic Engineering, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China;
    4 School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
  • Received:2025-04-21 Revised:2025-06-10 Accepted:2025-07-28 Online:2026-02-11 Published:2026-03-05
  • Contact: Jiajun Song, Yujie Peng, Yuxin Leng E-mail:songjiajun@siom.ac.cn;yjpeng@siom.ac.cn;lengyuxin@siom.ac.cn
  • Supported by:
    Project supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Nos. XDA0380205 and XDB0890101), the National Key Research and Development Program of China (Grant No. 2022YFA1604400), the National Natural Science Foundation of China (Grant Nos. 12388102, 62205351, 61925507, 62075227, 22227901, U21A20138, and 62375273), Shanghai Rising-Star Program (Grant No. 21QA1410200), the Fund from Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No. 2020248), the Fund from Shanghai Association for Science and Technology (Grant Nos. 22DZ1100300, 22560780100, and 23560750200), China Postdoctoral Science Foundation (Grant No. GZC20232817), and Shenzhen Major Scientific and Technological Projects (Grant No. KJZD20240903100205008).

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摘要： We demonstrate a high-power continuous-wave Tm:YLF laser with exceptional efficiency, achieved through laser diode end-pumping of dual Tm:YLF crystals in a thermally insensitive resonator at room temperature. The performance of the Tm:YLF laser system has been thoroughly investigated, covering output power, efficiency, power stability, and beam quality. A maximum output power of 45.85 W was achieved with an absorbed pump power of 60.89 W. The slope efficiency and absorbed-to-optical conversion efficiency were 80.9% and 75.3%, respectively. The laser exhibits excellent stability, with an RMS power stability of 0.33%. The beam quality ($M^{2}$) of the Tm:YLF laser in the horizontal and vertical directions were 1.01 and 1.05, respectively. This high-performance laser source is ideal for pumping holmium-doped crystals to generate 2-μm laser and mid-infrared laser generation via nonlinear optical processes.

关键词: Tm:YLF, 2-μm laser, high efficiency

Abstract: We demonstrate a high-power continuous-wave Tm:YLF laser with exceptional efficiency, achieved through laser diode end-pumping of dual Tm:YLF crystals in a thermally insensitive resonator at room temperature. The performance of the Tm:YLF laser system has been thoroughly investigated, covering output power, efficiency, power stability, and beam quality. A maximum output power of 45.85 W was achieved with an absorbed pump power of 60.89 W. The slope efficiency and absorbed-to-optical conversion efficiency were 80.9% and 75.3%, respectively. The laser exhibits excellent stability, with an RMS power stability of 0.33%. The beam quality ($M^{2}$) of the Tm:YLF laser in the horizontal and vertical directions were 1.01 and 1.05, respectively. This high-performance laser source is ideal for pumping holmium-doped crystals to generate 2-μm laser and mid-infrared laser generation via nonlinear optical processes.

Key words: Tm:YLF, 2-μm laser, high efficiency

中图分类号:  (Diode-pumped lasers)

  • 42.55.Xi
42.60.-v (Laser optical systems: design and operation) 42.55.-f (Lasers) 42.55.Ah (General laser theory)