Highly Sensitive Measurement of Oxygen Concentration Based on Reflector-Enhanced Photoacoustic Spectroscopy
Oxygen (O<sub>2</sub>) is a colorless and odorless substance, and is the most important gas in human life and industrial production. In this invited paper, a highly sensitive O<sub>2</sub> sensor based on reflector-enhanced photoacoustic spectroscopy (PAS) is reported for the...
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| Format: | Article |
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MDPI AG
2022-07-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/14/5087 |
| _version_ | 1797416056139022336 |
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| author | Shuhan Yang Shunda Qiao Xiaonan Liu Yufei Ma |
| author_facet | Shuhan Yang Shunda Qiao Xiaonan Liu Yufei Ma |
| author_sort | Shuhan Yang |
| collection | DOAJ |
| description | Oxygen (O<sub>2</sub>) is a colorless and odorless substance, and is the most important gas in human life and industrial production. In this invited paper, a highly sensitive O<sub>2</sub> sensor based on reflector-enhanced photoacoustic spectroscopy (PAS) is reported for the first time. A diode laser emitting at 760 nm was used as the excitation source. The diode laser beam was reflected by the adopted reflector to pass thorough the photoacoustic cell twice and further increase the optical absorption. With such enhanced absorption strategy, compared with the PAS system without the reflector, the reflector-enhanced O<sub>2</sub>-PAS sensor system had 1.85 times the signal improvement. The minimum detection limit (MDL) of such a reflector-enhanced O<sub>2</sub>-PAS sensor was experimentally determined to be 0.54%. The concentration response of this sensor was investigated when O<sub>2</sub> with a different concentration was used. The obtained results showed it has an excellent linear concentration response. The system stability was analyzed by using Allan variance, which indicated that the MDL for such a reflector-enhanced O<sub>2</sub>-PAS sensor could be improved to 318 ppm when the integration time of this sensor system is 1560 s. Finally, the O<sub>2</sub> concentration on the outside was continuously monitored for 24 h, indicated that this reflector-enhanced O<sub>2</sub>-PAS sensor system has an excellent measurement ability for actual applications in environmental monitoring, medical diagnostics, and other fields. |
| first_indexed | 2024-03-09T05:58:15Z |
| format | Article |
| id | doaj.art-633ae708ade44c1aa75929dfa601b5c4 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T05:58:15Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-633ae708ade44c1aa75929dfa601b5c42023-12-03T12:11:53ZengMDPI AGSensors1424-82202022-07-012214508710.3390/s22145087Highly Sensitive Measurement of Oxygen Concentration Based on Reflector-Enhanced Photoacoustic SpectroscopyShuhan Yang0Shunda Qiao1Xiaonan Liu2Yufei Ma3National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, ChinaNational Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, ChinaNational Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, ChinaNational Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, ChinaOxygen (O<sub>2</sub>) is a colorless and odorless substance, and is the most important gas in human life and industrial production. In this invited paper, a highly sensitive O<sub>2</sub> sensor based on reflector-enhanced photoacoustic spectroscopy (PAS) is reported for the first time. A diode laser emitting at 760 nm was used as the excitation source. The diode laser beam was reflected by the adopted reflector to pass thorough the photoacoustic cell twice and further increase the optical absorption. With such enhanced absorption strategy, compared with the PAS system without the reflector, the reflector-enhanced O<sub>2</sub>-PAS sensor system had 1.85 times the signal improvement. The minimum detection limit (MDL) of such a reflector-enhanced O<sub>2</sub>-PAS sensor was experimentally determined to be 0.54%. The concentration response of this sensor was investigated when O<sub>2</sub> with a different concentration was used. The obtained results showed it has an excellent linear concentration response. The system stability was analyzed by using Allan variance, which indicated that the MDL for such a reflector-enhanced O<sub>2</sub>-PAS sensor could be improved to 318 ppm when the integration time of this sensor system is 1560 s. Finally, the O<sub>2</sub> concentration on the outside was continuously monitored for 24 h, indicated that this reflector-enhanced O<sub>2</sub>-PAS sensor system has an excellent measurement ability for actual applications in environmental monitoring, medical diagnostics, and other fields.https://www.mdpi.com/1424-8220/22/14/5087photoacoustic spectroscopy (PAS)wavelength modulation spectroscopy (WMS)oxygen (O<sub>2</sub>) gas detectionreflector-enhanced |
| spellingShingle | Shuhan Yang Shunda Qiao Xiaonan Liu Yufei Ma Highly Sensitive Measurement of Oxygen Concentration Based on Reflector-Enhanced Photoacoustic Spectroscopy Sensors photoacoustic spectroscopy (PAS) wavelength modulation spectroscopy (WMS) oxygen (O<sub>2</sub>) gas detection reflector-enhanced |
| title | Highly Sensitive Measurement of Oxygen Concentration Based on Reflector-Enhanced Photoacoustic Spectroscopy |
| title_full | Highly Sensitive Measurement of Oxygen Concentration Based on Reflector-Enhanced Photoacoustic Spectroscopy |
| title_fullStr | Highly Sensitive Measurement of Oxygen Concentration Based on Reflector-Enhanced Photoacoustic Spectroscopy |
| title_full_unstemmed | Highly Sensitive Measurement of Oxygen Concentration Based on Reflector-Enhanced Photoacoustic Spectroscopy |
| title_short | Highly Sensitive Measurement of Oxygen Concentration Based on Reflector-Enhanced Photoacoustic Spectroscopy |
| title_sort | highly sensitive measurement of oxygen concentration based on reflector enhanced photoacoustic spectroscopy |
| topic | photoacoustic spectroscopy (PAS) wavelength modulation spectroscopy (WMS) oxygen (O<sub>2</sub>) gas detection reflector-enhanced |
| url | https://www.mdpi.com/1424-8220/22/14/5087 |
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