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    Journals >Infrared and Laser Engineering >Volume 51 >Issue 5 >Page 2021G008 > Article
    • Infrared and Laser Engineering
    • Vol. 51, Issue 5, 2021G008 (2022)
    Experimental study on tunable characteristics of optical parametric oscillator based on ZnGeP2in long-infared dual-band
    Dongdong Meng1、2, Zhanduo Qiao1, Baoguang Gao1、2, Tianqi Wang1, and Zhongwei Fan1、*
    Author Affiliations
  • 1The Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
  • 2School of Optoelectronics, University of Chinese Academy of Sciences, Beijing 100049, China
    • show less
    DOI: 10.3788/IRLA2021G008 Cite this Article
    Dongdong Meng, Zhanduo Qiao, Baoguang Gao, Tianqi Wang, Zhongwei Fan. Experimental study on tunable characteristics of optical parametric oscillator based on ZnGeP2in long-infared dual-band[J]. Infrared and Laser Engineering, 2022, 51(5): 2021G008 Copy Citation Text show less

    Abstract

    A widely tunable long-infrared optical parametric oscillator (OPO) based on ZnGeP2 (ZGP) with nanosecond pulses output in dual bands was reported in this paper. As a fundamental laser of ZGP-OPO, KTP- OPO of 2.1 μm based on type Ⅱ phase match was pumped by 1064 nm fundamental delivering <10 ns pulses at 50 Hz. Furthermore, the ZGP-OPO of 7-11 μm based on type Ⅰ phase match was designed. Continuous-tunable signal wavelengths of 2.815-2.963 μm corresponding idle wavelengths of 7.82-9.08 μm was obtained using angle tuning of ZGP. Continuous-tunable signal wavelengths of 2.624-2.662 μm and 2.745-2.956 μm, which correspond the idle wavelengths of 7.94-9.07 μm and 10.20-10.82 μm respectively , were obtained using pump wavelengths tuning. The single-pulse energy was 0.8 mJ at 8.03 μm, pump to idler conversion efficiency was 9.4%.

    Keywords

    $ \dfrac{{n_p^\rm {o}}}{{{\lambda _p}}} = \dfrac{{n_s^\rm {e}(\theta )}}{{{\lambda _s}}} + \dfrac{{n_i^\rm {e}(\theta )}}{{{\lambda _i}}} $(1)

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    $ n_{\rm e}^2(\theta ) = \frac{{n_{\rm o}^2n_{\rm e}^2}}{{n_{\rm o}^2{{\sin }^2}\theta + n_{\rm e}^2{{\cos }^2}\theta }} $(2)

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    $ n_{\rm o}^2 = 8.040\;9 + \frac{{1.686\;25{\lambda ^2}}}{{{\lambda ^2} - 0.408\;24}} + \frac{{1.288{\lambda ^2}}}{{{\lambda ^2} - 611.05}} $(3)

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    $ n_{\rm e}^2 = 8.092\;9 + \frac{{1.864\;9{\lambda ^2}}}{{{\lambda ^2} - 0.414\;68}} + \frac{{0.840\;52{\lambda ^2}}}{{{\lambda ^2} - 452.05}} $(4)

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    $ \frac{1}{{{\lambda _p}}} = \frac{1}{{{\lambda _s}}} + \frac{1}{{{\lambda _i}}} $(5)

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    Abstract
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    Dongdong Meng, Zhanduo Qiao, Baoguang Gao, Tianqi Wang, Zhongwei Fan. Experimental study on tunable characteristics of optical parametric oscillator based on ZnGeP2in long-infared dual-band[J]. Infrared and Laser Engineering, 2022, 51(5): 2021G008
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