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Infrared and Laser Engineering, Volume. 50, Issue 8, 20210341(2021)

Cavity-length detuning of mid-infrared femtosecond doubly resonant optical parametric oscillators (Invited)

Chengxiao Ning1 and Zhaowei Zhang1,2
Author Affiliations
  • 1School of Optical & Electronic Information, Huazhong University of Science & Technology, Wuhan 430074, China
  • 2Wuhan National Laboratory for Optoelectronics, Huazhong University of Science & Technology, Wuhan 430074, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
    Equations (8)
    References (19)
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    Figures & Tables(9)
    Schematic of the DRO structure in numerical simulation

    Fig. 1. Schematic of the DRO structure in numerical simulation

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    Output spectrum and output power vs cavity length detuning in the DRO

    Fig. 2. Output spectrum and output power vs cavity length detuning in the DRO

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    Near-degenerate optical spectrum generated by the DRO

    Fig. 3. Near-degenerate optical spectrum generated by the DRO

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    Calculated relative intra-cavity group delay (GD) curve of DRO

    Fig. 4. Calculated relative intra-cavity group delay (GD) curve of DRO

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    Signal light central wavelength correspondings to each level center at different cavity length detuning and the calculated relative intra-cavity GD (blue circle)，the black solid line is the relative group delay curve

    Fig. 5. Signal light central wavelength correspondings to each level center at different cavity length detuning and the calculated relative intra-cavity GD (blue circle)，the black solid line is the relative group delay curve

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    The temporal (a) and spectral intensities (b) of the DRO under positive cavity length detuning

    Fig. 6. The temporal (a) and spectral intensities (b) of the DRO under positive cavity length detuning

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    FWHM of the DRO output soliton with different intra-cavity TODs

    Fig. 7. FWHM of the DRO output soliton with different intra-cavity TODs

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    • Table 1. Parameters used in the numerical simulation of the DRO

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      Table 1. Parameters used in the numerical simulation of the DRO

      SymbolParameterValue
      λpCentral wavelength of the pump light/nm1035
      frepPump repetition/MHz80
      tpDuration of the pump pulses/fs180
      LcLength of the PPLN crystal/mm3
      LzThickness of the ZnSe plate/mm1.8
      LsThickness of the SiO2 plate/mm 3
      ΛPoling period of the PPLN crystal/μm31.4
      deff2nd order nonlinear optical coefficient/pm·V−125[14]
      RReflection of the output coupling mirror60%

    • Table 2. Intra-cavity TODs under different thickness of the SiO2 and ZnSe plates

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      Table 2. Intra-cavity TODs under different thickness of the SiO2 and ZnSe plates

      SiO2 /mm ZnSe/mmTOD/fs3
      00.552424
      31.84500
      63.156576
      94.48634
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    Chengxiao Ning, Zhaowei Zhang. Cavity-length detuning of mid-infrared femtosecond doubly resonant optical parametric oscillators (Invited)[J]. Infrared and Laser Engineering, 2021, 50(8): 20210341

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    Paper Information

    Category: Special issue—ultrafast and ultraintense mid-infrared laser technology

    Received: May. 27, 2021

    Accepted: --

    Published Online: Nov. 2, 2021

    The Author Email:

    DOI:10.3788/IRLA20210341

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology