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Chinese Journal of Lasers, Volume. 49, Issue 4, 0404002(2022)

New Method for Measuring Laser Wavelength Stability by Using Frequency-Modulated Continuous Wave Interferometer

Yuan Guo1, Gang Zheng1、*, Qiming Sheng2, Mengdi Nie1, Lang Bai1, and Yuan Han2
Author Affiliations
  • 1School of Opto-Electronic Engineering, Xi’an Technological University, Xi’an, Shaanxi 710021, China
  • 2School of Electronic Information Engineering, Xi’an Technological University, Xi’an, Shaanxi 710021, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (11)
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    References (15)
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    Figures & Tables(11)
    FMCW interferometric optical path

    Fig. 1. FMCW interferometric optical path

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    Waveforms of sawtooth modulated signal and beat signal of FMCW interferometer

    Fig. 2. Waveforms of sawtooth modulated signal and beat signal of FMCW interferometer

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    Schematic of measurement system

    Fig. 3. Schematic of measurement system

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    Flow chart of wavelength drift demodulation algorithm

    Fig. 4. Flow chart of wavelength drift demodulation algorithm

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    Experimental device

    Fig. 5. Experimental device

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    Thermal insulation stability of F-P cavity

    Fig. 6. Thermal insulation stability of F-P cavity

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    Theoretical wavelength drift

    Fig. 7. Theoretical wavelength drift

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    Measured wavelength drifts under different cavity lengths

    Fig. 8. Measured wavelength drifts under different cavity lengths

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    Test of wavelength stability by spectrometer

    Fig. 9. Test of wavelength stability by spectrometer

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    Test of wavelength stability by FMCW interferometric cavity

    Fig. 10. Test of wavelength stability by FMCW interferometric cavity

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    • Table 1. Performance comparison among FMCW interferometric cavity measurement method and existing measurement methods

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      Table 1. Performance comparison among FMCW interferometric cavity measurement method and existing measurement methods

      Measurement methodRelative measurement resolutionMeasuring time
      Optical beating method±1×10-9-±1×10-140.11.0 s
      Interference comparator1×10-81 s15 min
      Method using specific wavelength-sensitive material properties1×10-70.11.0 s
      FMCW interferometric cavity measurement method1.02×10-80.02 s
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    Yuan Guo, Gang Zheng, Qiming Sheng, Mengdi Nie, Lang Bai, Yuan Han. New Method for Measuring Laser Wavelength Stability by Using Frequency-Modulated Continuous Wave Interferometer[J]. Chinese Journal of Lasers, 2022, 49(4): 0404002

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    Paper Information

    Category: Measurement and metrology

    Received: May. 26, 2021

    Accepted: Jul. 8, 2021

    Published Online: Jan. 18, 2022

    The Author Email: Zheng Gang (zhengg@xatu.edu.cn)

    DOI:10.3788/CJL202249.0404002

    Topics

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