• Chinese Optics Letters
  • Vol. 20, Issue 3, 031201 (2022)
Xiaonan Liu and Yufei Ma*
Author Affiliations
  • National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
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    DOI: 10.3788/COL202220.031201 Cite this Article Set citation alerts
    Xiaonan Liu, Yufei Ma. Sensitive carbon monoxide detection based on light-induced thermoelastic spectroscopy with a fiber-coupled multipass cell [Invited][J]. Chinese Optics Letters, 2022, 20(3): 031201 Copy Citation Text show less
    Simulation of CO absorption spectra based on HITRAN 2012: (a) absorption line strength; (b) absorption coefficient of 50,000 ppm CO:N2 at 296 K, 1 atm, and 40 m optical path length.
    Fig. 1. Simulation of CO absorption spectra based on HITRAN 2012: (a) absorption line strength; (b) absorption coefficient of 50,000 ppm CO:N2 at 296 K, 1 atm, and 40 m optical path length.
    Schematic diagram of CO-LITES sensing system. MPC, multipass cell; QTF, quartz tuning fork; ∑, adder; PC, personal computer; FC, fiber collimator; DFB, distributed feedback.
    Fig. 2. Schematic diagram of CO-LITES sensing system. MPC, multipass cell; QTF, quartz tuning fork; ∑, adder; PC, personal computer; FC, fiber collimator; DFB, distributed feedback.
    Normalized and squared amplitude of QTF response as a function of frequency.
    Fig. 3. Normalized and squared amplitude of QTF response as a function of frequency.
    Normalized 2f signal amplitude of CO-LITES sensor as a function of laser wavelength modulation depth.
    Fig. 4. Normalized 2f signal amplitude of CO-LITES sensor as a function of laser wavelength modulation depth.
    CO-LITES sensor 2f signal for different concentrations.
    Fig. 5. CO-LITES sensor 2f signal for different concentrations.
    Linear relationship between the peak value of the 2f signal and CO concentration.
    Fig. 6. Linear relationship between the peak value of the 2f signal and CO concentration.
    Allan deviation analysis of the CO-LITES sensor.
    Fig. 7. Allan deviation analysis of the CO-LITES sensor.
    MethodNNEA (cm1·W·Hz1/2)
    QEPAS[39]1.45×105
    This work1.15×107
    Table 1. Performance Comparison of Two QTF-Based Methods for CO Detection
    Xiaonan Liu, Yufei Ma. Sensitive carbon monoxide detection based on light-induced thermoelastic spectroscopy with a fiber-coupled multipass cell [Invited][J]. Chinese Optics Letters, 2022, 20(3): 031201
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