Chinese Optics Letters, Volume. 20, Issue 3, 031201(2022)
Sensitive carbon monoxide detection based on light-induced thermoelastic spectroscopy with a fiber-coupled multipass cell [Invited]
Figures & Tables(8)
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.
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.
Fig. 3. Normalized and squared amplitude of QTF response as a function of frequency.
Fig. 4. Normalized 2f signal amplitude of CO-LITES sensor as a function of laser wavelength modulation depth.
Fig. 6. Linear relationship between the peak value of the 2f signal and CO concentration.
Table 1. Performance Comparison of Two QTF-Based Methods for CO Detection
View tableView in ArticleTable 1. Performance Comparison of Two QTF-Based Methods for CO Detection
Method NNEA ( ) QEPAS[ 39 ]This work
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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
Paper Information
Category: Instrumentation, Measurement, and Optical Sensing
Received: Dec. 5, 2021
Accepted: Dec. 29, 2021
Published Online: Jan. 26, 2022
The Author Email: Yufei Ma (mayufei@hit.edu.cn)
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