Simultaneous Detection of CO<sub>2</sub> and CH<sub>4</sub> Using a DFB Diode Laser-Based Absorption Spectrometer
In this paper, an attractive gas sensing technique based on fiber optical sensing ideal was developed for the detection of multi-gas species simultaneously. Calibration-free laser absorption spectroscopy (LAS) was used and combined with a multi-pass optical absorption cell, two fiber-coupled near-in...
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MDPI AG
2022-09-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/10/10/390 |
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| author | Xu Wu Yulong Du Shijian Shi Cong Jiang Xueliang Deng Song Zhu Xiaolong Jin Jingsong Li |
| author_facet | Xu Wu Yulong Du Shijian Shi Cong Jiang Xueliang Deng Song Zhu Xiaolong Jin Jingsong Li |
| author_sort | Xu Wu |
| collection | DOAJ |
| description | In this paper, an attractive gas sensing technique based on fiber optical sensing ideal was developed for the detection of multi-gas species simultaneously. Calibration-free laser absorption spectroscopy (LAS) was used and combined with a multi-pass optical absorption cell, two fiber-coupled near-infrared (NIR) distributed feedback (DFB) diode lasers are used and coupled into a single optical path for measuring CO<sub>2</sub> and CH<sub>4</sub> absorption spectra simultaneously. The optimal sampling pressure, laser tuning characteristics, spectral sampling points, and potential optical interference are theoretically and experimentally investigated in detail. The results indicated that the proposed technique has good reliability and has been successfully demonstrated for ambient CO<sub>2</sub> and CH<sub>4</sub> detection by using a single sample cell and detector. An Allan–Werle deviation analysis shows that detection limits of 0.12 ppm for CH<sub>4</sub> and 35.97 ppm for CO<sub>2</sub> can be obtained with an integration time of 181 s and 166 s, respectively. The proposed technique can be expanded to measure more molecules simultaneously by combing laser array and may pave a new way for developing a low-cost and ultra-compact multi-gas laser spectroscopy sensing system. |
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| id | doaj.art-82b348b0882642478e6b82a5086db09a |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-09T20:28:16Z |
| publishDate | 2022-09-01 |
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| spelling | doaj.art-82b348b0882642478e6b82a5086db09a2023-11-23T23:29:53ZengMDPI AGChemosensors2227-90402022-09-01101039010.3390/chemosensors10100390Simultaneous Detection of CO<sub>2</sub> and CH<sub>4</sub> Using a DFB Diode Laser-Based Absorption SpectrometerXu Wu0Yulong Du1Shijian Shi2Cong Jiang3Xueliang Deng4Song Zhu5Xiaolong Jin6Jingsong Li7Laser Spectroscopy and Sensing Laboratory, Anhui University, Hefei 230601, ChinaLaser Spectroscopy and Sensing Laboratory, Anhui University, Hefei 230601, ChinaLaser Spectroscopy and Sensing Laboratory, Anhui University, Hefei 230601, ChinaLaser Spectroscopy and Sensing Laboratory, Anhui University, Hefei 230601, ChinaHefei Meteorological Bureau, Hefei 230041, ChinaHefei Meteorological Bureau, Hefei 230041, ChinaHefei Meteorological Bureau, Hefei 230041, ChinaLaser Spectroscopy and Sensing Laboratory, Anhui University, Hefei 230601, ChinaIn this paper, an attractive gas sensing technique based on fiber optical sensing ideal was developed for the detection of multi-gas species simultaneously. Calibration-free laser absorption spectroscopy (LAS) was used and combined with a multi-pass optical absorption cell, two fiber-coupled near-infrared (NIR) distributed feedback (DFB) diode lasers are used and coupled into a single optical path for measuring CO<sub>2</sub> and CH<sub>4</sub> absorption spectra simultaneously. The optimal sampling pressure, laser tuning characteristics, spectral sampling points, and potential optical interference are theoretically and experimentally investigated in detail. The results indicated that the proposed technique has good reliability and has been successfully demonstrated for ambient CO<sub>2</sub> and CH<sub>4</sub> detection by using a single sample cell and detector. An Allan–Werle deviation analysis shows that detection limits of 0.12 ppm for CH<sub>4</sub> and 35.97 ppm for CO<sub>2</sub> can be obtained with an integration time of 181 s and 166 s, respectively. The proposed technique can be expanded to measure more molecules simultaneously by combing laser array and may pave a new way for developing a low-cost and ultra-compact multi-gas laser spectroscopy sensing system.https://www.mdpi.com/2227-9040/10/10/390laser absorption spectroscopycalibration-freemulti-gas detectionCO<sub>2</sub>CH<sub>4</sub> |
| spellingShingle | Xu Wu Yulong Du Shijian Shi Cong Jiang Xueliang Deng Song Zhu Xiaolong Jin Jingsong Li Simultaneous Detection of CO<sub>2</sub> and CH<sub>4</sub> Using a DFB Diode Laser-Based Absorption Spectrometer Chemosensors laser absorption spectroscopy calibration-free multi-gas detection CO<sub>2</sub> CH<sub>4</sub> |
| title | Simultaneous Detection of CO<sub>2</sub> and CH<sub>4</sub> Using a DFB Diode Laser-Based Absorption Spectrometer |
| title_full | Simultaneous Detection of CO<sub>2</sub> and CH<sub>4</sub> Using a DFB Diode Laser-Based Absorption Spectrometer |
| title_fullStr | Simultaneous Detection of CO<sub>2</sub> and CH<sub>4</sub> Using a DFB Diode Laser-Based Absorption Spectrometer |
| title_full_unstemmed | Simultaneous Detection of CO<sub>2</sub> and CH<sub>4</sub> Using a DFB Diode Laser-Based Absorption Spectrometer |
| title_short | Simultaneous Detection of CO<sub>2</sub> and CH<sub>4</sub> Using a DFB Diode Laser-Based Absorption Spectrometer |
| title_sort | simultaneous detection of co sub 2 sub and ch sub 4 sub using a dfb diode laser based absorption spectrometer |
| topic | laser absorption spectroscopy calibration-free multi-gas detection CO<sub>2</sub> CH<sub>4</sub> |
| url | https://www.mdpi.com/2227-9040/10/10/390 |
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