Simultaneous atmospheric nitrous oxide, methane and water vapor detection with a single continuous wave quantum cascade laser

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dc.citation.firstpage2121en_US
dc.citation.issueNumber3en_US
dc.citation.journalTitleOptics Expressen_US
dc.citation.lastpage2132en_US
dc.citation.volumeNumber23en_US
dc.contributor.authorCao, Yingchunen_US
dc.contributor.authorSanchez, Nancy P.en_US
dc.contributor.authorJiang, Wenzheen_US
dc.contributor.authorGriffin, Robert J.en_US
dc.contributor.authorXie, Fengen_US
dc.contributor.authorHughes, Lawrence C.en_US
dc.contributor.authorZah, Chung-enen_US
dc.contributor.authorTittel, Frank K.en_US
dc.date.accessioned2016-06-22T17:41:38Z
dc.date.available2016-06-22T17:41:38Z
dc.date.issued2015en_US
dc.description.abstractA continuous wave (CW) quantum cascade laser (QCL) based absorption sensor system was demonstrated and developed for simultaneous detection of atmospheric nitrous oxide (N2O), methane (CH4), and water vapor (H2O). A 7.73-µm CW QCL with its wavelength scanned over a spectral range of 1296.9-1297.6 cm−1 was used to simultaneously target three neighboring strong absorption lines, N2O at 1297.05 cm−1, CH4 at 1297.486 cm−1, and H2O at 1297.184 cm−1. An astigmatic multipass Herriott cell with a 76-m path length was utilized for laser based gas absorption spectroscopy at an optimum pressure of 100 Torr. Wavelength modulation and second harmonic detection was employed for data processing. Minimum detection limits (MDLs) of 1.7 ppb for N2O, 8.5 ppb for CH4, and 11 ppm for H2O were achieved with a 2-s integration time for individual gas detection. This single QCL based multi-gas detection system possesses applications in environmental monitoring and breath analysis.en_US
dc.identifier.citationCao, Yingchun, Sanchez, Nancy P., Jiang, Wenzhe, et al.. "Simultaneous atmospheric nitrous oxide, methane and water vapor detection with a single continuous wave quantum cascade laser." <i>Optics Express,</i> 23, no. 3 (2015) The Optical Society: 2121-2132. http://dx.doi.org/10.1364/OE.23.002121.
dc.identifier.doihttp://dx.doi.org/10.1364/OE.23.002121en_US
dc.identifier.urihttps://hdl.handle.net/1911/90526
dc.language.isoengen_US
dc.publisherThe Optical Society
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 atmospheric nitrous oxide, methane and water vapor detection with a single continuous wave quantum cascade laseren_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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