• Photonics Research
  • Vol. 9, Issue 7, 07001191 (2021)
Meng’en Wei1、2, Tingqing Cheng1, Renqin Dou3, Qingli Zhang3, and Haihe Jiang1、2、*
Author Affiliations
  • 1Anhui Province Key Laboratory of Medical Physics and Technology, Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
  • 2University of Science and Technology of China, Hefei 230026, China
  • 3Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
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    Abstract

    Herein, we report a homemade new Nd:YAG crystal rod that contains a gradient dopant of 0.39–0.80 at.% Nd3+ from end to end, achieving superior performance of a 2 kHz Nd:YAG pulse laser at 1064 nm. The optical-to-optical conversion efficiency reached 53.8%, and the maximum output power of the laser was 24.2 W, enhanced by 35.9% compared with a uniform crystal rod with the same total concentration of Nd3+. Significantly, our experiments revealed that the gradient concentration crystal produced a relatively even pumping distribution along the rod axis, greatly reducing the temperature gradient as well as having a smaller thermal effect. The pump and thermal distribution smoothing obviously improved the features of laser oscillation and output.
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    Meng’en Wei, Tingqing Cheng, Renqin Dou, Qingli Zhang, Haihe Jiang. Superior performance of a 2 kHz pulse Nd:YAG laser based on a gradient-doped crystal[J]. Photonics Research, 2021, 9(7): 07001191
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    Category: Lasers and Laser Optics
    Received: Mar. 12, 2021
    Accepted: Apr. 10, 2021
    Posted: Apr. 13, 2021
    Published Online: Jun. 9, 2021
    The Author Email: Haihe Jiang (hjiang@aiofm.ac.cn)