• High Power Laser Science and Engineering
  • Vol. 9, Issue 3, 03000e38 (2021)
Xinlin Lü1、2, Yujie Peng1, Wenyu Wang1、3, Yuanan Zhao4, Xiangyu Zhu4, and Yuxin Leng1、*
Author Affiliations
  • 1State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing100049, China
  • 3School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan430074, China
  • 4Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai201800, China
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    Abstract

    In this study, a high-energy, temporally shaped picosecond ultraviolet (UV) laser running at 100 Hz is demonstrated, with its pulses boosted to 120 mJ by cascaded regenerative and double-pass amplifiers, resulting in a gain of more than 108. With precise manipulation and optimization, the amplified laser pulses were flat-top in the temporal and spatial domains to maintain high filling factors, which significantly improved the conversion efficiency of the subsequent third harmonic generation (THG). Finally, 91 mJ, 470 ps pulses were obtained at 355 nm, corresponding to a conversion efficiency as high as 76%, which, as far as we are aware of, is the highest THG efficiency for a high-repetition-rate picosecond laser. In addition, the energy stability of the UV laser is better than 1.07% (root mean square), which makes this laser an attractive source for a variety of fields including laser conditioning and micro-fabrication.
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    Xinlin Lü, Yujie Peng, Wenyu Wang, Yuanan Zhao, Xiangyu Zhu, Yuxin Leng. High-energy, high-repetition-rate ultraviolet pulses from an efficiency-enhanced, frequency-tripled laser[J]. High Power Laser Science and Engineering, 2021, 9(3): 03000e38
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    Category: Research Articles
    Received: Feb. 25, 2021
    Accepted: Apr. 9, 2021
    Posted: Jul. 15, 2021
    Published Online: Jul. 15, 2021
    The Author Email: Yujie Peng (yjpeng@siom.ac.cn), Yuxin Leng (yjpeng@siom.ac.cn)