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Sub-ppm-level ammonia detection using photoacoustic spectroscopy with an optical microphone based on a phase interferometer

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dc.affiliation.dptoUC3M. Departamento de Tecnología Electrónicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Sensores y Técnicas de Instrumentaciónes
dc.contributor.authorBonilla Manrique, Óscar Elías
dc.contributor.authorPosada Román, Julio Enrique
dc.contributor.authorGarcía Souto, José Antonio
dc.contributor.authorRuiz Llata, Marta
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.date.accessioned2022-10-21T09:26:19Z
dc.date.available2022-10-21T09:26:19Z
dc.date.issued2019-07-01
dc.description.abstractA sensitive optical microphone for photoacoustic spectroscopy based on the common path topology of a fibre laser Doppler vibrometer (FLDV) using phase-generated carrier demodulation and a slim diaphragm as an acoustic wave transducer was demonstrated. A resonant gas cell was adapted to enhance gas-detection performance and simultaneously provide efficient cancellation of the window background acoustic signal. Ammonia (NH3) was selected as the target gas. The absorption line was experimentally identified using a distributed feedback laser diode emitting at 1530 nm. The linearity and sensitivity of the gas sensor were measured using wavelength modulation spectroscopy with second harmonic detection. A Teflon diaphragm was used to implement the optical microphone, along with the FLDV, showing a minimum detectable pressure of 79.5 mu Pa/Hz(1/2). The noise-equivalent absorption sensitivity for NH3 detection at the absorption line at 1531.7 nm was 1.85 x 10(-8) W cm(-1) Hz(-1/2), and the limit of detection was 785 ppbv.en
dc.description.sponsorshipThis research was funded by the Government of Spain, grant number TEC2017-86271-R.en
dc.description.statusPublicado
dc.format.extent14es
dc.identifier.bibliographicCitationSensors 2019, 19(13), 2890, 14 p.en
dc.identifier.doihttps://doi.org/10.3390/s19132890
dc.identifier.issn1424-3210
dc.identifier.issn1424-8220 (online)
dc.identifier.publicationfirstpage1es
dc.identifier.publicationissue13es
dc.identifier.publicationlastpage14es
dc.identifier.publicationtitleSensorsen
dc.identifier.publicationvolume19es
dc.identifier.urihttps://hdl.handle.net/10016/35915
dc.identifier.uxxiAR/0000024346
dc.language.isoengen
dc.publisherMDPIen
dc.relation.projectIDGobierno de España. TEC2017-86271-Res
dc.rights© 2019 by the authors. Licensee MDPI, Basel, Switzerlanden
dc.rightsThis article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).en
dc.rightsAtribución 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subject.ecienciaElectrónicaes
dc.subject.otherPhotoacoustic spectroscopye
dc.subject.otherGas detectionen
dc.subject.otherOptical microphoneen
dc.subject.otherResonant cellen
dc.subject.otherMembraneen
dc.titleSub-ppm-level ammonia detection using photoacoustic spectroscopy with an optical microphone based on a phase interferometeren
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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