Piezo-enhanced acoustic detection module for mid-infrared trace gas sensing using a grooved quartz tuning fork

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dc.citation.firstpage35267
dc.citation.issueNumber24
dc.citation.journalTitleOptics Express
dc.citation.lastpage35278
dc.citation.volumeNumber27
dc.contributor.authorLi, Shangzhi
dc.contributor.authorLi, Shangzhi
dc.contributor.authorWu, Hongpeng
dc.contributor.authorWu, Hongpeng
dc.contributor.authorCui, Ruyue
dc.contributor.authorCui, Ruyue
dc.contributor.authorSampaolo, Angelo
dc.contributor.authorPatimisco, Pietro
dc.contributor.authorSpagnolo, Vincenzo
dc.contributor.authorSpagnolo, Vincenzo
dc.contributor.authorSpagnolo, Vincenzo
dc.contributor.authorTittel, Frank K.
dc.contributor.authorDong, Lei
dc.contributor.authorDong, Lei
dc.date.accessioned2021-10-19T15:35:28Z
dc.date.available2021-10-19T15:35:28Z
dc.date.issued2019
dc.description.abstractA grooved quartz tuning fork (QTF) with a prong spacing of 800 µm for QEPAS application is reported. The prongs spacing is large enough to facilitate optical alignments when a degraded laser beam is used for QEPAS-based trace gas sensors. The grooved QTF has a resonance frequency of 15.2 kHz at atmospheric pressure and is characterized by four rectangular grooves carved on the QTF prong surfaces. With a grooved-prong, the electrical resistance R of the QTF is reduced resulting in an enhanced piezoelectric signal, while the Q factor is not affected, remaining as high as 15000 at atmospheric pressure. The geometric parameters of the acoustic micro resonators (AmRs) for on-beam QEPAS were optimized to match the grooved QTF, and a signal-to-noise gain factor of ∼ 30 was obtained with an optimum configuration. The performance of the QEPAS-based sensor was demonstrated exploiting an interband cascade laser (ICL) for CH4 detection and a 1σ normalized noise equivalent absorption (NNEA) coefficient of 4.1×10−9 cm−1 W/√Hz was obtained at atmospheric pressure.
dc.identifier.citationLi, Shangzhi, Li, Shangzhi, Wu, Hongpeng, et al.. "Piezo-enhanced acoustic detection module for mid-infrared trace gas sensing using a grooved quartz tuning fork." <i>Optics Express,</i> 27, no. 24 (2019) Optica Publishing Group: 35267-35278. https://doi.org/10.1364/OE.27.035267.
dc.identifier.digitaloe-27-24-35267
dc.identifier.doihttps://doi.org/10.1364/OE.27.035267
dc.identifier.urihttps://hdl.handle.net/1911/111572
dc.language.isoeng
dc.publisherOptica Publishing Group
dc.rightsPublished under the terms of the OSA Open Access Publishing Agreement
dc.rights.urihttps://www.osapublishing.org/library/license_v1.cfm
dc.titlePiezo-enhanced acoustic detection module for mid-infrared trace gas sensing using a grooved quartz tuning fork
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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