Light-induced off-axis cavity-enhanced thermoelastic spectroscopy in the near-infrared for trace gas sensing

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dc.citation.firstpage23213
dc.citation.issueNumber15
dc.citation.journalTitleOptics Express
dc.citation.lastpage23224
dc.citation.volumeNumber29
dc.contributor.authorZheng, Kaiyuan
dc.contributor.authorZheng, Chuantao
dc.contributor.authorZheng, Chuantao
dc.contributor.authorHu, Lien
dc.contributor.authorGuan, Gangyun
dc.contributor.authorMa, Yanming
dc.contributor.authorSong, Fang
dc.contributor.authorZhang, Yu
dc.contributor.authorZhang, Yu
dc.contributor.authorWang, Yiding
dc.contributor.authorTittel, Frank K.
dc.date.accessioned2021-07-30T15:21:21Z
dc.date.available2021-07-30T15:21:21Z
dc.date.issued2021
dc.description.abstractA trace gas sensing technique of light-induced off-axis cavity-enhanced thermoelastic spectroscopy (OA-CETES) in the near-infrared was demonstrated by combing a high-finesse off-axis integrated cavity and a high Q-factor resonant quartz tuning fork (QTF). Sensor parameters of the cavity and QTF were optimized numerically and experimentally. As a proof-of-principle, we employed the OA-CETES for water vapor (H2O) detection using a QTF (Q-factor ∼12000 in atmospheric pressure) and a 10cm-long Fabry-Perot cavity (finesse ∼ 482). By probing a H2O line at 7306.75 cm-1, the developed OA-CETES sensor achieved a minimum detection limit (MDL) of 8.7 parts per million (ppm) for a 300 ms integration time and a normalized noise equivalent absorption (NNEA) coefficient of 4.12 × 10−9cm-1 WHz-1/2. Continuous monitoring of indoor and outdoor atmospheric H2O concentration levels was performed for verifying the sensing applicability. The realization of the proposed OA-CETES technique with compact QTF and long effective path cavity allows a class of optical sensors with low cost, high sensitivity and potential for long-distance and multi-point sensing.
dc.identifier.citationZheng, Kaiyuan, Zheng, Chuantao, Zheng, Chuantao, et al.. "Light-induced off-axis cavity-enhanced thermoelastic spectroscopy in the near-infrared for trace gas sensing." <i>Optics Express,</i> 29, no. 15 (2021) Optical Society of Americ: 23213-23224. https://doi.org/10.1364/OE.430745.
dc.identifier.digitaloe-29-15-23213
dc.identifier.doihttps://doi.org/10.1364/OE.430745
dc.identifier.urihttps://hdl.handle.net/1911/111046
dc.language.isoeng
dc.publisherOptical Society of Americ
dc.rightsPublished under the terms of the OSA Open Access Publishing Agreement
dc.rights.urihttps://www.osapublishing.org/library/license_v1.cfm#VOR-OA
dc.titleLight-induced off-axis cavity-enhanced thermoelastic spectroscopy in the near-infrared for trace gas sensing
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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