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  • Received: Apr. 25, 2019

    Accepted: Jun. 20, 2019

    Posted: Sep. 12, 2019

    Published Online: Sep. 12, 2019

    The Author Email: Yongji Yu (yyjcust@163.com)

    DOI: 10.3788/COL201917.111404

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    Heyan Liu, Yongji Yu, Dehui Sun, Hong Liu, Yuheng Wang, Hao Zheng, Dan Li, Guangyong Jin. 1514 nm eye-safe passively Q-switched self-optical parametric oscillator based on Nd3+-doped MgO:PPLN[J]. Chinese Optics Letters, 2019, 17(11): 111404

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Chinese Optics Letters, Vol. 17, Issue 11, 111404 (2019)

1514 nm eye-safe passively Q-switched self-optical parametric oscillator based on Nd3+-doped MgO:PPLN

Heyan Liu1, Yongji Yu1,*, Dehui Sun2, Hong Liu2, Yuheng Wang1, Hao Zheng1, Dan Li1, and Guangyong Jin1

Author Affiliations

  • 1Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology, Changchun 130022, China
  • 2Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, China

Abstract

We examined a 1514 nm eye-safe passively Q-switched self-optical parametric oscillator. The nonlinear crystal is an a-cut Nd:MgO:PPLN crystal, and the size of the crystal was 6 mm × 2 mm × 30 mm with 0.4 at.% Nd3+ doped and a grating period of 29.8 μm. When the crystal absorbed 12.8 W, the output maximum single-pulse energy reached 39 μJ, and a pulse width of 6.1 ns at a repetition rate of 5.4 kHz was obtained. The peak power was 6 kW, giving a slope efficiency of 42%.