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  • Received: Apr. 9, 2018

    Accepted: Jun. 13, 2018

    Posted: Jan. 17, 2019

    Published Online: Aug. 2, 2018

    The Author Email: Xiaolei Zhu (xlzhu@siom.ac.cn)

    DOI: 10.3788/COL201816.081901

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    Jian Ma, Tingting Lu, Xiaolei Zhu, Xiuhua Ma, Shiguang Li, Tianhua Zhou, Weibiao Chen. Highly efficient H-β Fraunhofer line optical parametric oscillator pumped by a single-frequency 355  nm laser[J]. Chinese Optics Letters, 2018, 16(8): 081901

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Chinese Optics Letters, Vol. 16, Issue 8, 081901 (2018)

Highly efficient H-β Fraunhofer line optical parametric oscillator pumped by a single-frequency 355  nm laser

Jian Ma1,2, Tingting Lu1, Xiaolei Zhu1,*, Xiuhua Ma1, Shiguang Li1, Tianhua Zhou1, and Weibiao Chen1

Author Affiliations

  • 1Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China

Abstract

A highly efficient laser system output at the H-β Fraunhofer line of 486.1 nm has been demonstrated. A high pulse energy single-frequency hybrid 1064 nm master oscillator power amplifier was frequency-tripled to achieve 355 nm laser pulses, which acted as the pump source of the beta barium borate nanosecond pulse optical parametric oscillator. With pump energy of 190 mJ, the laser system generated a maximum output of 62 mJ blue laser pulses at 486.1 nm, corresponding to conversion efficiency of 32.6%. The laser spectrum width was measured to be around 0.1 nm, being in conformity with the spectrum width of the solar Fraunhofer line.