Investigation and Optimization of a Line-Locked Quartz Enhanced Spectrophone for Rapid Carbon Dioxide Measurement
We have developed a rapid quartz enhanced spectrophone for carbon dioxide (CO<sub>2</sub>) measurement, in which the laser wavelength was tightly locked to a CO<sub>2</sub> absorption line and a custom quartz tuning fork (QTF) operating at 12.5 kHz was employed. The intrinsic...
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MDPI AG
2021-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/15/5225 |
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| author | Hui Zhang Wenling Jin Mengpeng Hu Mai Hu Jingqiu Liang Qiang Wang |
| author_facet | Hui Zhang Wenling Jin Mengpeng Hu Mai Hu Jingqiu Liang Qiang Wang |
| author_sort | Hui Zhang |
| collection | DOAJ |
| description | We have developed a rapid quartz enhanced spectrophone for carbon dioxide (CO<sub>2</sub>) measurement, in which the laser wavelength was tightly locked to a CO<sub>2</sub> absorption line and a custom quartz tuning fork (QTF) operating at 12.5 kHz was employed. The intrinsic QTF oscillation-limited response time, as well as the optimal feedback interval, was experimentally investigated. By tightly locking the laser to the R(16) transition of CO<sub>2</sub>, we obtained a stable laser operation with its center wavelength variation kept within 0.0002 cm<sup>−1</sup>, merely three times the laser linewidth. The reported CO<sub>2</sub> sensor achieved a detection limit of 7 ppm, corresponding to a normalized noise equivalent absorption coefficient (NNEA) of 4.7 × 10<sup>−9</sup> W·cm<sup>−1</sup>·Hz<sup>−1/2</sup>, at a response time of 0.5 s. The detection limit can be further improved to 0.45 ppm at an integration time of 270 s, illustrating a good system stability. This spectrophone enables the realization of compact and fast-response gas sensors for many scenarios, where CO<sub>2</sub> concentration from sub-ppm to hundreds of thousands of ppm is expected. |
| first_indexed | 2024-03-09T04:41:55Z |
| format | Article |
| id | doaj.art-6b4bcb61c40a4a0ca102cb1d2e89c5ef |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T04:41:55Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-6b4bcb61c40a4a0ca102cb1d2e89c5ef2023-12-03T13:19:29ZengMDPI AGSensors1424-82202021-08-012115522510.3390/s21155225Investigation and Optimization of a Line-Locked Quartz Enhanced Spectrophone for Rapid Carbon Dioxide MeasurementHui Zhang0Wenling Jin1Mengpeng Hu2Mai Hu3Jingqiu Liang4Qiang Wang5State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaNational Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaState Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaState Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaState Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaWe have developed a rapid quartz enhanced spectrophone for carbon dioxide (CO<sub>2</sub>) measurement, in which the laser wavelength was tightly locked to a CO<sub>2</sub> absorption line and a custom quartz tuning fork (QTF) operating at 12.5 kHz was employed. The intrinsic QTF oscillation-limited response time, as well as the optimal feedback interval, was experimentally investigated. By tightly locking the laser to the R(16) transition of CO<sub>2</sub>, we obtained a stable laser operation with its center wavelength variation kept within 0.0002 cm<sup>−1</sup>, merely three times the laser linewidth. The reported CO<sub>2</sub> sensor achieved a detection limit of 7 ppm, corresponding to a normalized noise equivalent absorption coefficient (NNEA) of 4.7 × 10<sup>−9</sup> W·cm<sup>−1</sup>·Hz<sup>−1/2</sup>, at a response time of 0.5 s. The detection limit can be further improved to 0.45 ppm at an integration time of 270 s, illustrating a good system stability. This spectrophone enables the realization of compact and fast-response gas sensors for many scenarios, where CO<sub>2</sub> concentration from sub-ppm to hundreds of thousands of ppm is expected.https://www.mdpi.com/1424-8220/21/15/5225quartz enhanced photoacoustic spectroscopycarbon dioxidecustom quartz tuning forkwavelength lockinglaser spectroscopy |
| spellingShingle | Hui Zhang Wenling Jin Mengpeng Hu Mai Hu Jingqiu Liang Qiang Wang Investigation and Optimization of a Line-Locked Quartz Enhanced Spectrophone for Rapid Carbon Dioxide Measurement Sensors quartz enhanced photoacoustic spectroscopy carbon dioxide custom quartz tuning fork wavelength locking laser spectroscopy |
| title | Investigation and Optimization of a Line-Locked Quartz Enhanced Spectrophone for Rapid Carbon Dioxide Measurement |
| title_full | Investigation and Optimization of a Line-Locked Quartz Enhanced Spectrophone for Rapid Carbon Dioxide Measurement |
| title_fullStr | Investigation and Optimization of a Line-Locked Quartz Enhanced Spectrophone for Rapid Carbon Dioxide Measurement |
| title_full_unstemmed | Investigation and Optimization of a Line-Locked Quartz Enhanced Spectrophone for Rapid Carbon Dioxide Measurement |
| title_short | Investigation and Optimization of a Line-Locked Quartz Enhanced Spectrophone for Rapid Carbon Dioxide Measurement |
| title_sort | investigation and optimization of a line locked quartz enhanced spectrophone for rapid carbon dioxide measurement |
| topic | quartz enhanced photoacoustic spectroscopy carbon dioxide custom quartz tuning fork wavelength locking laser spectroscopy |
| url | https://www.mdpi.com/1424-8220/21/15/5225 |
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