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Chinese Optics  > 2026  > Accepted Manuscript
ZHOU Tian-chen, LI Ke-xue, CHEN Yi, ZHANG Xin, YU Jing-hua, ZHANG Yi-wen, SUN Jun-jie, CHEN Fei, WANG Xiao-hua, WEI Zhi-peng. Research progress on high-power, high-beam-quality short-pulse/ultrashort-pulse solid-state green laser technology[J]. Chinese Optics. doi: 10.37188/CO.2025-0050
Citation: ZHOU Tian-chen, LI Ke-xue, CHEN Yi, ZHANG Xin, YU Jing-hua, ZHANG Yi-wen, SUN Jun-jie, CHEN Fei, WANG Xiao-hua, WEI Zhi-peng. Research progress on high-power, high-beam-quality short-pulse/ultrashort-pulse solid-state green laser technology[J]. Chinese Optics. doi: 10.37188/CO.2025-0050
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Research progress on high-power, high-beam-quality short-pulse/ultrashort-pulse solid-state green laser technology

cstr: 32171.14.CO.2025-0050
  • 1.

    State Key Laboratory of High Power Semiconductor Laser, Changchun University of Science and Technology, Jilin 130022, China

  • 2.

    Optoelectronic Countermeasures Department, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science, Changchun 130033, China

  • 3.

    University of Chinese Academy of Sciences, Beijing 100049, China

Funds:  National Key R&D Program of China (No. 2023YFB4604400), the National Natural Science Foundation of China (No. 62434001, 62027820), the Science and Technology Development Project of Jilin Province (No. SKL202402019), the Natural Science Foundation of Jilin Province (No. 20230101352JC), the “111” Project of China (No. D17017).
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    Abstract

  • High-power, high-beam-quality short-pulse/ultrashort-pulse green lasers have wide applications in industry, medicine, and scientific research. To clarify the research progress of green light sources based on second-harmonic generation (SHG, frequency doubling), this paper systematically reviews the latest advancements in SHG green light sources at kilohertz repetition rates, categorized by pulse width and doubling scheme into four types: nanosecond intracavity doubling, nanosecond extracavity doubling, picosecond extracavity doubling, and femtosecond extracavity doubling. For nanosecond intracavity doubling, crystals such as KTP and LBO are used, with power increased to 51.1 W (energy 50 mJ, repetition rate 1 kHz) and efficiency of 50%. Nanosecond extracavity doubling primarily employs LBO, where tandem frequency-doubling crystals can elevate the doubling power to 1.04 kW (energy 1.04 J, efficiency 89%). Picosecond extracavity doubling achieves the highest average power of 1460 W (energy 259 mJ, efficiency 71%). Femtosecond doubling, by employing thin crystals, boosts power to 29 W (energy 440 μJ, efficiency >52%). The advancements in SHG-based green light sources and related application technologies will continually expand their boundaries in scientific research, industry, medicine, and other fields.

     

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