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

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dc.citation.articleNumber4187en_US
dc.citation.issueNumber19en_US
dc.citation.journalTitleSensorsen_US
dc.citation.volumeNumber19en_US
dc.contributor.authorQiao, Shundaen_US
dc.contributor.authorQu, Yanchenen_US
dc.contributor.authorMa, Yufeien_US
dc.contributor.authorHe, Yingen_US
dc.contributor.authorWang, Yaoen_US
dc.contributor.authorHu, Yinqiuen_US
dc.contributor.authorYu, Xinen_US
dc.contributor.authorZhang, Zhonghuaen_US
dc.contributor.authorTittel, Frank K.en_US
dc.date.accessioned2019-10-23T14:49:57Zen_US
dc.date.available2019-10-23T14:49:57Zen_US
dc.date.issued2019en_US
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.en_US
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.en_US
dc.identifier.doihttps://doi.org/10.3390/s19194187en_US
dc.identifier.urihttps://hdl.handle.net/1911/107493en_US
dc.language.isoengen_US
dc.publisherMDPIen_US
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 citeden_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.subject.keywordphotoacoustic spectroscopyen_US
dc.subject.keywordcarbon dioxide detectionen_US
dc.subject.keywordquantum cascade laseren_US
dc.titleA Sensitive Carbon Dioxide Sensor Based on Photoacoustic Spectroscopy with a Fixed Wavelength Quantum Cascade Laseren_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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