A Sensitive Carbon Dioxide Sensor Based on Photoacoustic Spectroscopy with a Fixed Wavelength Quantum Cascade Laser

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dc.citation.articleNumber4187
dc.citation.issueNumber19
dc.citation.journalTitleSensors
dc.citation.volumeNumber19
dc.contributor.authorQiao, Shunda
dc.contributor.authorQu, Yanchen
dc.contributor.authorMa, Yufei
dc.contributor.authorHe, Ying
dc.contributor.authorWang, Yao
dc.contributor.authorHu, Yinqiu
dc.contributor.authorYu, Xin
dc.contributor.authorZhang, Zhonghua
dc.contributor.authorTittel, Frank K.
dc.date.accessioned2019-10-23T14:49:57Z
dc.date.available2019-10-23T14:49:57Z
dc.date.issued2019
dc.description.abstractA photoacoustic spectroscopy (PAS) based carbon dioxide (CO2) sensor with a fixed wavelength quantum cascade laser (FW-QCL) was demonstrated. The emission wavelength of the FW-QCL at 4.42 μm in the mid-infrared spectral region matched a fundamental CO2 absorption line. Amplitude modulation of the laser intensity was used to match the resonant photoacoustic (PA) cell. The noise from the background was reduced with the correlation demodulation technique. The experimental results showed that the sensor had excellent signal stability and a concentration linear response. When the integration time was 1 s, a 1σ minimum detection limit (MDL) of 2.84 parts per million (ppm) for CO2 detection was achieved. The long-term stability of the sensor was evaluated by means of an Allan deviation analysis. With an integration time of ~100 s, the MDL was improved to 1 ppm. This sensor was also used to measure the CO2 concentration from some common emission sources, such as cigarette smoking, automobile exhaust, and the combustion of some carbon-containing materials, which confirmed the stability and robustness of the reported FW-QCL based CO2-PAS sensor system.
dc.identifier.citationQiao, Shunda, Qu, Yanchen, Ma, Yufei, et al.. "A Sensitive Carbon Dioxide Sensor Based on Photoacoustic Spectroscopy with a Fixed Wavelength Quantum Cascade Laser." <i>Sensors,</i> 19, no. 19 (2019) MDPI: https://doi.org/10.3390/s19194187.
dc.identifier.doihttps://doi.org/10.3390/s19194187
dc.identifier.urihttps://hdl.handle.net/1911/107493
dc.language.isoeng
dc.publisherMDPI
dc.rightsThis is an open access article distributed under theﾠCreative Commons Attribution Licenseﾠwhich permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.keywordphotoacoustic spectroscopy
dc.subject.keywordcarbon dioxide detection
dc.subject.keywordquantum cascade laser
dc.titleA Sensitive Carbon Dioxide Sensor Based on Photoacoustic Spectroscopy with a Fixed Wavelength Quantum Cascade Laser
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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