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    Journals >Acta Optica Sinica >Volume 40 >Issue 16 >Page 1630001 > Article
    • Acta Optica Sinica
    • Vol. 40, Issue 16, 1630001 (2020)
    Measurement of Gas Concentration Under Strong Interference by Frequency Multiplexing Based on High-Frequency Reference Signal
    Jiuxiang Lian1, Bin Zhou1、*, Yihong Wang1, and Jian Li2
    Author Affiliations
  • 1School of Energy and Environment, Southeast University, Nanjing, Jiangsu 210096, China
  • 2College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, China
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    DOI: 10.3788/AOS202040.1630001 Cite this Article Set citation alerts
    Jiuxiang Lian, Bin Zhou, Yihong Wang, Jian Li. Measurement of Gas Concentration Under Strong Interference by Frequency Multiplexing Based on High-Frequency Reference Signal[J]. Acta Optica Sinica, 2020, 40(16): 1630001 Copy Citation Text show less
    Light intensity signals. (a) Interference-free light intensity signal; (b) interference (f=1 kHz) light intensity signal; (c) corrected light intensity signal
    Fig. 1. Light intensity signals. (a) Interference-free light intensity signal; (b) interference (f=1 kHz) light intensity signal; (c) corrected light intensity signal
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    Spectra of light intensity signal at fundamental frequency (f=1 kHz). (a) Overall view; (b) detailed view
    Fig. 2. Spectra of light intensity signal at fundamental frequency (f=1 kHz). (a) Overall view; (b) detailed view
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    Spectra of light intensity signal at double-frequency (f=1 kHz)
    Fig. 3. Spectra of light intensity signal at double-frequency (f=1 kHz)
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    Normalized second harmonic signal and residual obtained by simulation (f=1 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
    Fig. 4. Normalized second harmonic signal and residual obtained by simulation (f=1 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
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    Light intensity signals. (a) Interference-free light intensity signal; (b) interference (f=8 kHz) light intensity signal; (c) corrected light intensity signal
    Fig. 5. Light intensity signals. (a) Interference-free light intensity signal; (b) interference (f=8 kHz) light intensity signal; (c) corrected light intensity signal
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    Spectra of light intensity signal at fundamental frequency (f=8 kHz). (a) Overall view; (b) detailed view
    Fig. 6. Spectra of light intensity signal at fundamental frequency (f=8 kHz). (a) Overall view; (b) detailed view
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    Spectra of light intensity signal at double-frequency (f=8 kHz)
    Fig. 7. Spectra of light intensity signal at double-frequency (f=8 kHz)
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    Normalized second harmonic signal and residual obtained by simulation (f=8 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
    Fig. 8. Normalized second harmonic signal and residual obtained by simulation (f=8 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
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    Molar fraction and its error of methane at different interference frequencies
    Fig. 9. Molar fraction and its error of methane at different interference frequencies
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    Simulated molar fraction of methane without correction
    Fig. 10. Simulated molar fraction of methane without correction
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    Simulated molar fraction of methane with correction
    Fig. 11. Simulated molar fraction of methane with correction
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    Schematic of experimental system
    Fig. 12. Schematic of experimental system
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    Interference signal in experimental (f=1 kHz)
    Fig. 13. Interference signal in experimental (f=1 kHz)
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    Normalized second harmonic signal and residual obtained by experiment (f=1 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
    Fig. 14. Normalized second harmonic signal and residual obtained by experiment (f=1 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
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    Interference signal in experiment (f=8 kHz)
    Fig. 15. Interference signal in experiment (f=8 kHz)
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    Normalized second harmonic signal and residual obtained by experiment (f=8 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
    Fig. 16. Normalized second harmonic signal and residual obtained by experiment (f=8 kHz). (a) 2f/1f signal; (b) residual of 2f/1f signal
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    Measured molar fraction of methane without correction
    Fig. 17. Measured molar fraction of methane without correction
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    Measured molar fraction of methane with correction
    Fig. 18. Measured molar fraction of methane with correction
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    Interference frequencyrange /kHzTemperature /℃Interference frequency range /kHzTemperature /℃Interference frequency range /kHzTemperature /℃
    0--0.219.10--3.619.30--7.019.3
    0--0.419.10--3.819.30--7.219.3
    0--0.619.10--4.019.20--7.419.3
    0--0.819.10--4.219.20--7.619.3
    0--1.019.10--4.419.20--7.819.3
    0--1.219.20--4.619.20--8.019.3
    0--1.419.10--4.819.30--8.219.4
    0--1.619.10--5.019.30--8.419.4
    0--1.819.10--5.219.30--8.619.4
    0--2.019.20--5.419.30--8.819.3
    0--2.219.20--5.619.30--9.019.4
    0--2.419.20--5.819.40--9.219.4
    0--2.619.20--6.019.40--9.419.4
    0--2.819.20--6.219.40--9.619.4
    0--3.019.30--6.419.40--9.819.4
    0--3.219.30--6.619.40--10.019.4
    0--3.419.30--6.819.4
    Table 1. Experimental temperature at different interference frequency ranges
    Abstract
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    Jiuxiang Lian, Bin Zhou, Yihong Wang, Jian Li. Measurement of Gas Concentration Under Strong Interference by Frequency Multiplexing Based on High-Frequency Reference Signal[J]. Acta Optica Sinica, 2020, 40(16): 1630001
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    Paper Information
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