Nitrous oxide quartz-enhanced photoacoustic detection employing a broadband distributed-feedback quantum cascade laser array

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dc.citation.articleNumber171101ﾠen_US
dc.citation.journalTitleApplied Physics Lettersen_US
dc.citation.volumeNumber113en_US
dc.contributor.authorGiglio, Marilenaen_US
dc.contributor.authorPatimisco, Pietroen_US
dc.contributor.authorSampaolo, Angeloen_US
dc.contributor.authorZifarelli, Andreaen_US
dc.contributor.authorBlanchard, Romainen_US
dc.contributor.authorPfluegl, Christianen_US
dc.contributor.authorWitinski, Mark F.en_US
dc.contributor.authorVakhshoori, Daryooshen_US
dc.contributor.authorTittel, Frank K.en_US
dc.contributor.authorSpagnolo, Vincenzoen_US
dc.date.accessioned2018-11-19T16:38:36Zen_US
dc.date.available2018-11-19T16:38:36Zen_US
dc.date.issued2018en_US
dc.description.abstractWe present a gas sensing system based on quartz-enhanced photoacoustic spectroscopy (QEPAS) employing a monolithic distributed-feedback quantum cascade laser (QCL) array operated in a pulsed mode as a light source. The array consists of 32 quantum cascade lasers emitting in a spectral range from 1190 cm−1 to 1340 cm−1. The optoacoustic detection module was composed of a custom quartz tuning fork with a prong spacing of 1 mm, coupled with two micro-resonator tubes to enhance the signal-to-noise ratio. The QEPAS sensor was validated by detecting the absorption of the P- and R-branches of nitrous oxide. The measurements were performed by switching the array QCLs in sequence while tuning their operating temperature to retrieve the fine structure of the two N2O branches. A sensor calibration was performed, demonstrating a linear responsivity for N2O:N2 concentrations from 1000 down to 200 parts-per-million. With a 10 s lock-in integration time, a detection sensitivity of less than 60 parts-per-billion was achieved permitting the monitoring of nitrous oxide at global atmospheric levels.en_US
dc.identifier.citationGiglio, Marilena, Patimisco, Pietro, Sampaolo, Angelo, et al.. "Nitrous oxide quartz-enhanced photoacoustic detection employing a broadband distributed-feedback quantum cascade laser array." <i>Applied Physics Letters,</i> 113, (2018) AIP Publishing: https://doi.org/10.1063/1.5049872.en_US
dc.identifier.doihttps://doi.org/10.1063/1.5049872en_US
dc.identifier.urihttps://hdl.handle.net/1911/103358en_US
dc.language.isoengen_US
dc.publisherAIP Publishingen_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.titleNitrous oxide quartz-enhanced photoacoustic detection employing a broadband distributed-feedback quantum cascade laser arrayen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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