Ppb-level formaldehyde detection using a CW room-temperature interband cascade laser and a miniature dense pattern multipass gas cell

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dc.citation.firstpage19821en_US
dc.citation.issueNumber15en_US
dc.citation.journalTitleOptics Expressen_US
dc.citation.lastpage19830en_US
dc.citation.volumeNumber23en_US
dc.contributor.authorDong, Leien_US
dc.contributor.authorYu, Yajunen_US
dc.contributor.authorLi, Chunguangen_US
dc.contributor.authorSo, Stephenen_US
dc.contributor.authorTittel, Frank K.en_US
dc.date.accessioned2015-10-30T15:40:40Zen_US
dc.date.available2015-10-30T15:40:40Zen_US
dc.date.issued2015en_US
dc.description.abstractA ppb-level formaldehyde (H2CO) sensor was developed using a thermoelectrically cooled (TEC), continuous-wave (CW) room temperature interband cascade laser (ICL) emitting at 3.59 μm and a miniature dense pattern multipass gas cell with >50 m optical path length. Performance of the sensor was investigated with two measurement schemes: direct absorption (DAS) and wavelength modulation spectroscopy (WMS). With an integration time of less than 1.5 second, a detection limit of ~3 ppbv for H2CO measurement with precision of 1.25 ppbv for DAS and 0.58 ppbv for WMS, respectively, was achieved without zero air based background subtraction. An Allan-Werle variance analysis indicated that the precisions can be further improved to 0.26 ppbv @ 300s for DAS and 69 pptv @ 90 s for WMS, respectively. A side-by-side comparison between two measurement schemes is also discussed in detail.en_US
dc.identifier.citationDong, Lei, Yu, Yajun, Li, Chunguang, et al.. "Ppb-level formaldehyde detection using a CW room-temperature interband cascade laser and a miniature dense pattern multipass gas cell." <i>Optics Express,</i> 23, no. 15 (2015) The Optical Society: 19821-19830. http://dx.doi.org/10.1364/OE.23.019821.en_US
dc.identifier.doihttp://dx.doi.org/10.1364/OE.23.019821en_US
dc.identifier.urihttps://hdl.handle.net/1911/82000en_US
dc.language.isoengen_US
dc.publisherThe Optical Societyen_US
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.en_US
dc.titlePpb-level formaldehyde detection using a CW room-temperature interband cascade laser and a miniature dense pattern multipass gas cellen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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