Simultaneous dual-gas QEPAS detection based on a fundamental and overtone combined vibration of quartz tuning fork

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dc.citation.articleNumber121104
dc.citation.issueNumber12
dc.citation.journalTitleApplied Physics Letters
dc.citation.volumeNumber110
dc.contributor.authorWu, Hongpeng
dc.contributor.authorYin, Xukun
dc.contributor.authorDong, Lei
dc.contributor.authorPei, Kailong
dc.contributor.authorSampaolo, Angelo
dc.contributor.authorPatimisco, Pietro
dc.contributor.authorZheng, Huadan
dc.contributor.authorMa, Weiguang
dc.contributor.authorZhang, Lei
dc.contributor.authorYin, Wangbao
dc.contributor.authorXiao, Liantuan
dc.contributor.authorSpagnolo, Vincenzo
dc.contributor.authorJia, Suotang
dc.contributor.authorTittel, Frank K.
dc.date.accessioned2017-03-28T21:32:36Z
dc.date.available2017-03-28T21:32:36Z
dc.date.issued2017
dc.description.abstractA dual-gas quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor system based on a frequency division multiplexing technique of a quartz tuning fork (QTF) was developed and experimentally demonstrated. Two beams from two independently modulated lasers are focused at two different positions between the QTF prongs to excite both the QTF fundamental and 1st overtone flexural modes simultaneously. The 2f-wavelength modulation technique is employed by applying two sinusoidal dithers, whose frequencies are equal to a half of the QTF fundamental and 1st overtone frequencies, respectively, to the currents of two excitation lasers. The resonance frequency difference between two flexural modes ensures that the correlated photoacoustic signals generated by different target gases do not interfere with each other. The proposed QEPAS methodology realizes a continuous real-time dual-gas monitoring with a simple setup and small sensor size compared with previous multi-gas QEPAS sensors.
dc.identifier.citationWu, Hongpeng, Yin, Xukun, Dong, Lei, et al.. "Simultaneous dual-gas QEPAS detection based on a fundamental and overtone combined vibration of quartz tuning fork." <i>Applied Physics Letters,</i> 110, no. 12 (2017) AIP Publishing LLC: http://dx.doi.org/10.1063/1.4979085.
dc.identifier.doihttp://dx.doi.org/10.1063/1.4979085
dc.identifier.urihttps://hdl.handle.net/1911/94042
dc.language.isoeng
dc.publisherAIP Publishing LLC
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.titleSimultaneous dual-gas QEPAS detection based on a fundamental and overtone combined vibration of quartz tuning fork
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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