Off-axis cavity-enhanced absorption spectroscopy of 14NH3 in air using a gain-switched frequency comb at 1.514 μm

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dc.contributor.authorChandran, Satheesh
dc.contributor.authorRuth, Albert A.
dc.contributor.authorMartin, Eamonn P.
dc.contributor.authorAlexander, Justin K.
dc.contributor.authorPeters, Frank H.
dc.contributor.authorAnandarajah, Prince M.
dc.contributor.funderEnterprise Irelanden
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2019-12-05T14:47:09Z
dc.date.available2019-12-05T14:47:09Z
dc.date.issued2019-11-28
dc.date.updated2019-12-05T14:39:26Z
dc.description.abstractA custom-designed gain-switched frequency comb (GSFC) source was passively coupled to a medium finesse (F ≈ 522) cavity in off-axis configuration for the detection of ammonia (14NH3) in static dry air. The absorption of ammonia was detected in the near infrared spectral region between 6604 and 6607 cm−1 using a Fourier transform detection scheme. More than 30 lines of the GSFC output (free spectral range 2.5 GHz) overlapped with the strongest ro-vibrational ammonia absorption features in that spectral region. With the cavity in off-axis configuration, an NH3 detection limit of ∼3.7 ppmv in 20 s was accomplished in a laboratory environment. The experimental performance of the prototype spectrometer was characterized; advantages, drawbacks and the potential for future applications are discusseden
dc.description.sponsorshipEnterprise Ireland (EI Commercialisation Fund (CF 2017 0683));en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid5217en
dc.identifier.citationChandran, S., Ruth, A. A., Martin, E. P., Alexander, J. K., Peters, F. H. and Anandarajah, P. M. (2019) 'Off-Axis Cavity-Enhanced Absorption Spectroscopy of 14NH3 in Air Using a Gain-Switched Frequency Comb at 1.514 μm', Sensors, 19 (23), 5217 (15 pp). doi: 10.3390/s19235217en
dc.identifier.doi10.3390/s19235217en
dc.identifier.endpage15en
dc.identifier.issn1424-8220
dc.identifier.issued23en
dc.identifier.journaltitleSensorsen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/9348
dc.identifier.volume19en
dc.language.isoenen
dc.publisherMDPIen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Technology and Innovation Development Award (TIDA)/14/TIDA/2415/IE/Frequency comb sources for cutting-edge trace gas detection/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Career Development Award/15/CDA/3640/IE/PROgrammable multicarrier Transmitter for flexible Optical Networks (PROTON)/en
dc.relation.urihttps://www.mdpi.com/1424-8220/19/23/5217
dc.rights© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This 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.subjectCavity-enhanced absorption spectroscopyen
dc.subjectOff-axis alignmenten
dc.subjectFrequency comben
dc.subjectGain switchingen
dc.subjectNear infrared (IR) rangeen
dc.subjectFourier transform spectroscopyen
dc.subjectNH3 sensingen
dc.subjectAmmonia detectionen
dc.titleOff-axis cavity-enhanced absorption spectroscopy of 14NH3 in air using a gain-switched frequency comb at 1.514 μmen
dc.typeArticle (peer-reviewed)en
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