Chinese Journal of Lasers, Volume. 49, Issue 13, 1301001(2022)

LD Pumped Watt-Level Actively Q-switched Alexandrite Laser

Wang Jingchong1, Guan Chen2,3, Liu Zhaojun1,2,*, Cong Zhenhua1,2, Wang Shiwu4, Nie Yi4, Liu Yang2,5, and Zhao Zhigang1,2,**
Author Affiliations
  • 1Key Laboratory of Laser and Infrared System of Ministry of Education, Shandong University, Qingdao 266237, Shandong, China
  • 2School of Information Science and Engineering, Shandong University, Qingdao 266237, Shandong, China
  • 3Qilu University of Technology (Shandong Academy of Sciences), Jinan 250104, Shandong, China
  • 4Crystech Co., Ltd., Qingdao 266000, Shandong, China
  • 5Jinan Institute of Quantum Technology, Jinan 250101, Shandong, China
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    This paper presents a red LD pumped Q-switched Alexandrite laser. A watt-level pulsed laser is obtained in a V-shaped cavity. The corresponding repetition rate is 10 kHz, the pulse duration is 961 ns, and the pulse energy is 116 μJ. Wavelength tuning from 728 to 793 nm is demonstrated with BRF. Based on the Q-switched rate equations, a well-matched numerical simulation is obtained, and the effect of pump energy on pulse duration is analyzed. A shorter pulse laser of 10 ns is also achieved by cavity dumping and the peak power is over 3 kW. In the future work, we will continue to optimize the design of the cavity and the experimental parameters. Based on the need of specific applications, we will try to achieve higher-energy, higher-efficiency, shorter pulse duration, and narrower linewidth Alexandrite lasers pumped by red LDs.


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    Jingchong Wang, Chen Guan, Zhaojun Liu, Zhenhua Cong, Shiwu Wang, Yi Nie, Yang Liu, Zhigang Zhao. LD Pumped Watt-Level Actively Q-switched Alexandrite Laser[J]. Chinese Journal of Lasers, 2022, 49(13): 1301001

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    Paper Information

    Category: laser devices and laser physics

    Received: Oct. 28, 2021

    Accepted: Nov. 26, 2021

    Published Online: Apr. 22, 2022

    The Author Email: Liu Zhaojun (, Zhao Zhigang (



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