Near-infrared acetylene sensor system using off-axis integrated-cavity output spectroscopy and two measurement schemes

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dc.citation.firstpage26205
dc.citation.issueNumber20
dc.citation.journalTitleOptics Express
dc.citation.lastpage26216
dc.citation.volumeNumber26
dc.contributor.authorZheng, Kaiyuan
dc.contributor.authorZheng, Chuantao
dc.contributor.authorHe, Qixin
dc.contributor.authorYao, Dan
dc.contributor.authorHu, Lien
dc.contributor.authorZhang, Yu
dc.contributor.authorWang, Yiding
dc.contributor.authorTittel, Frank K.
dc.date.accessioned2018-11-15T17:16:13Z
dc.date.available2018-11-15T17:16:13Z
dc.date.issued2018
dc.description.abstractFor highly sensitive and accurate acetylene (C2H2) detection, a near-infrared (NIR) off-axis integrated-cavity output spectroscopy (OA-ICOS) sensor system based on an ultra-compact cage-based absorption cell was proposed. The absorption cell with dimensions of 10 cm × 8 cm × 6 cm realized a dense-pattern and an easily-aligned stable optical system. The OA-ICOS sensor system employed a 6cm-long optical cavity that was formed by two mirrors with a reflectivity of 99.35% and provided an effective absorption path length of ∼9.28 m. The performance of the C2H2 sensor system based on two measurement schemes, i.e. laser direct absorption spectroscopy (LDAS) and wavelength modulation spectroscopy (WMS) is reported. A NIR distributed feedback (DFB) laser was employed for targeting a C2H2 absorption line at 6523.88 cm−1. An Allan deviation analysis yielded a detection sensitivity of 760 parts-per-billion in volume (ppbv) for an averaging time of 304 s using the LDAS-based OA-ICOS. A detection sensitivity of 85 ppbv for an averaging time of 250 s was obtained using the WMS-based OA-ICOS, which was further improved by a factor of ~9 compared to the result obtained with the LDAS method. The proposed sensor system has the advantages of reduced size and cost with acceptable detection sensitivity, which is suitable for applications in trace gas sensing in harsh environments and weight-limited balloon-embedded observations.
dc.identifier.citationZheng, Kaiyuan, Zheng, Chuantao, He, Qixin, et al.. "Near-infrared acetylene sensor system using off-axis integrated-cavity output spectroscopy and two measurement schemes." <i>Optics Express,</i> 26, no. 20 (2018) Optical Society of America: 26205-26216. https://doi.org/10.1364/OE.26.026205.
dc.identifier.digitaloe-26-20-26205
dc.identifier.doihttps://doi.org/10.1364/OE.26.026205
dc.identifier.urihttps://hdl.handle.net/1911/103344
dc.language.isoeng
dc.publisherOptical Society of America
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.titleNear-infrared acetylene sensor system using off-axis integrated-cavity output spectroscopy and two measurement schemes
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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