High-Power DFB Diode Laser-Based CO-QEPAS Sensor: Optimization and Performance

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dc.citation.articleNumber122
dc.citation.issueNumber1
dc.citation.journalTitleSensors
dc.citation.volumeNumber18
dc.contributor.authorMa, Yufei
dc.contributor.authorTong, Yao
dc.contributor.authorHe, Ying
dc.contributor.authorYu, Xin
dc.contributor.authorTittel, Frank K.
dc.date.accessioned2018-07-11T18:51:13Z
dc.date.available2018-07-11T18:51:13Z
dc.date.issued2018
dc.description.abstractA highly sensitive carbon monoxide (CO) trace gas sensor based on quartz-enhanced photoacoustic spectroscopy (QEPAS) was demonstrated. A high-power distributed feedback (DFB), continuous wave (CW) 2.33 μm diode laser with an 8.8 mW output power was used as the QEPAS excitation source. By optimizing the modulation depth and adding an optimum micro-resonator, compared to a bare quartz tuning fork (QTF), a 10-fold enhancement of the CO-QEPAS signal amplitude was achieved. When water vapor acting as a vibrational transfer catalyst was added to the target gas, the signal was further increased by a factor of ~7. A minimum detection limit (MDL) of 11.2 ppm and a calculated normalized noise equivalent absorption (NNEA) coefficient of 1.8 × 10−5 cm−1W/√Hz were obtained for the reported CO-QEPAS sensor.
dc.identifier.citationMa, Yufei, Tong, Yao, He, Ying, et al.. "High-Power DFB Diode Laser-Based CO-QEPAS Sensor: Optimization and Performance." <i>Sensors,</i> 18, no. 1 (2018) MDPI: https://doi.org/10.3390/s18010122.
dc.identifier.doihttps://doi.org/10.3390/s18010122
dc.identifier.urihttps://hdl.handle.net/1911/102397
dc.language.isoeng
dc.publisherMDPI
dc.rightsThis is an open access article distributed under the Creative Commons Attribution License which 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.keywordQEPAS
dc.subject.keywordcarbon monoxide
dc.subject.keywordhigh power diode laser
dc.subject.keywordgas sensor
dc.titleHigh-Power DFB Diode Laser-Based CO-QEPAS Sensor: Optimization and Performance
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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