Photothermal Interferometry Gas Sensor Based on the First Harmonic Signal
Photothermal interferometry (PTI) incorporated with wavelength modulation spectroscopy is a typical ultrasensitive spectroscopic technique for trace gas detection. In this paper, to our best knowledge, we demonstrate that the first harmonic signal is the best choice for a PTI spectroscopy gas sensin...
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IEEE
2018-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8329238/ |
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| author | Zhiming Yang Guolu Yin Chuancan Liang Tao Zhu |
| author_facet | Zhiming Yang Guolu Yin Chuancan Liang Tao Zhu |
| author_sort | Zhiming Yang |
| collection | DOAJ |
| description | Photothermal interferometry (PTI) incorporated with wavelength modulation spectroscopy is a typical ultrasensitive spectroscopic technique for trace gas detection. In this paper, to our best knowledge, we demonstrate that the first harmonic signal is the best choice for a PTI spectroscopy gas sensing system for the first time. Both the theoretical and experimental results confirm that the first harmonics signal has the largest peak-to-peak amplitude in all harmonic signals. The noise measurement indicates that the all harmonic signals nearly have the same noise level. The detection limit in terms of noise equivalent concentration is improved by 30%, from 114 to 78 ppb ( <inline-formula><tex-math notation="LaTeX">${\text{9}}\,\times \,{\text{10}}^{-8}\,{\text{cm}}^{-1}$</tex-math> </inline-formula> in absorption coefficient) by use of the first harmonic signal instead of the second harmonic signal. |
| format | Article |
| id | doaj-art-e5f07738c2ec4d8fa3eaaa9bd69a9b13 |
| institution | Matheson Library |
| issn | 1943-0655 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-e5f07738c2ec4d8fa3eaaa9bd69a9b132025-07-01T23:37:37ZengIEEEIEEE Photonics Journal1943-06552018-01-011021710.1109/JPHOT.2018.28218458329238Photothermal Interferometry Gas Sensor Based on the First Harmonic SignalZhiming Yang0https://orcid.org/0000-0001-8196-7528Guolu Yin1https://orcid.org/0000-0002-8004-4198Chuancan Liang2https://orcid.org/0000-0001-6983-4378Tao Zhu3https://orcid.org/0000-0001-6211-4570The Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing, ChinaThe Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing, ChinaThe Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing, ChinaThe Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing, ChinaPhotothermal interferometry (PTI) incorporated with wavelength modulation spectroscopy is a typical ultrasensitive spectroscopic technique for trace gas detection. In this paper, to our best knowledge, we demonstrate that the first harmonic signal is the best choice for a PTI spectroscopy gas sensing system for the first time. Both the theoretical and experimental results confirm that the first harmonics signal has the largest peak-to-peak amplitude in all harmonic signals. The noise measurement indicates that the all harmonic signals nearly have the same noise level. The detection limit in terms of noise equivalent concentration is improved by 30%, from 114 to 78 ppb ( <inline-formula><tex-math notation="LaTeX">${\text{9}}\,\times \,{\text{10}}^{-8}\,{\text{cm}}^{-1}$</tex-math> </inline-formula> in absorption coefficient) by use of the first harmonic signal instead of the second harmonic signal.https://ieeexplore.ieee.org/document/8329238/Optical fiber sensorsphotothermal effectsgasesspectroscopyinterference |
| spellingShingle | Zhiming Yang Guolu Yin Chuancan Liang Tao Zhu Photothermal Interferometry Gas Sensor Based on the First Harmonic Signal IEEE Photonics Journal Optical fiber sensors photothermal effects gases spectroscopy interference |
| title | Photothermal Interferometry Gas Sensor Based on the First Harmonic Signal |
| title_full | Photothermal Interferometry Gas Sensor Based on the First Harmonic Signal |
| title_fullStr | Photothermal Interferometry Gas Sensor Based on the First Harmonic Signal |
| title_full_unstemmed | Photothermal Interferometry Gas Sensor Based on the First Harmonic Signal |
| title_short | Photothermal Interferometry Gas Sensor Based on the First Harmonic Signal |
| title_sort | photothermal interferometry gas sensor based on the first harmonic signal |
| topic | Optical fiber sensors photothermal effects gases spectroscopy interference |
| url | https://ieeexplore.ieee.org/document/8329238/ |
| work_keys_str_mv | AT zhimingyang photothermalinterferometrygassensorbasedonthefirstharmonicsignal AT guoluyin photothermalinterferometrygassensorbasedonthefirstharmonicsignal AT chuancanliang photothermalinterferometrygassensorbasedonthefirstharmonicsignal AT taozhu photothermalinterferometrygassensorbasedonthefirstharmonicsignal |