Infrared and Laser Engineering, Volume. 49, Issue 7, 20190512(2020)

Miniaturized mid-infrared MgO: PPLN optical parametric oscillator with high beam quality

Xiang Bai1... Yang He2, Deyang Yu2, Kuo Zhang2 and Fei Chen2 |Show fewer author(s)
Author Affiliations
  • 1北京跟踪与通信技术研究所,北京 100094
  • 2中国科学院长春光学精密机械与物理研究所,吉林 长春 130033
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    In order to meet the engineering application of mid-infrared laser, a miniaturized mid-infrared MgO: PPLN optical parametric oscillator (MgO: PPLN-OPO) with high beam quality was presented. The pump source was an acousto-optical Q-switched Nd: YVO4 laser. By pumping the MgO: PPLN crystal, the mid-infrared laser with high efficiency and high peak power was obtained. And the mid-infrared beam quality was improved by adding an aperture in the cavity. The whole laser was cooled by thermoelectric cooling and air cooling. Therefore, the size of the laser was miniaturized. Experimental results indicate that the acousto-optical Q-switched Nd: YVO4 laser can realize the pulse laser with the highest power of 9.3 W at 1.064 μm. The corresponding optical to optical conversion efficiency is 27.2% and the peak power is ~27.5 kW. With the Nd: YVO4 laser pump, the MgO: PPLN-OPO can output the pulse laser at 3.765 μm. When adding the aperture in the cavity, the maximum output power of the MgO: PPLN-OPO decreases from 1.20 W to 1.08 W. However, the beam quality improves obviously. The Mx2 and My2factors change from 1.89 and 1.98 to 1.20 and 1.29, respectively. The pulse width and the peak power of mid-infrared laser are 8.4 ns and ~4.3 kW, respectively.

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    Xiang Bai, Yang He, Deyang Yu, Kuo Zhang, Fei Chen. Miniaturized mid-infrared MgO: PPLN optical parametric oscillator with high beam quality[J]. Infrared and Laser Engineering, 2020, 49(7): 20190512

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    Paper Information

    Category: 激光器与激光光学

    Received: Apr. 2, 2020

    Accepted: --

    Published Online: Aug. 19, 2020

    The Author Email:

    DOI:10.3788/IRLA20190512

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