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

Show simple item record Chandran, Satheesh Ruth, Albert A. Martin, Eamonn P. Alexander, Justin K. Peters, Frank H. Anandarajah, Prince M. 2019-12-05T14:47:09Z 2019-12-05T14:47:09Z 2019-11-28
dc.identifier.citation Chandran, 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/s19235217 en
dc.identifier.volume 19 en
dc.identifier.issued 23 en
dc.identifier.startpage 1 en
dc.identifier.endpage 15 en
dc.identifier.issn 1424-8220
dc.identifier.doi 10.3390/s19235217 en
dc.description.abstract A 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 discussed en
dc.description.sponsorship Enterprise Ireland (EI Commercialisation Fund (CF 2017 0683)); en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher MDPI en
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 ( en
dc.subject Cavity-enhanced absorption spectroscopy en
dc.subject Off-axis alignment en
dc.subject Frequency comb en
dc.subject Gain switching en
dc.subject Near infrared (IR) range en
dc.subject Fourier transform spectroscopy en
dc.subject NH3 sensing en
dc.subject Ammonia detection en
dc.title Off-axis cavity-enhanced absorption spectroscopy of 14NH3 in air using a gain-switched frequency comb at 1.514 μm en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Albert Ruth, Physics, University College Cork, Cork, Ireland. +353-21-490-3000 Email: en
dc.internal.availability Full text available en 2019-12-05T14:39:26Z
dc.description.version Published Version en
dc.internal.rssid 500168541
dc.contributor.funder Enterprise Ireland en
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Sensors en
dc.internal.copyrightchecked No
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress en
dc.internal.IRISemailaddress en
dc.internal.IRISemailaddress en
dc.identifier.articleid 5217 en
dc.relation.project info: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.project info:eu-repo/grantAgreement/SFI/SFI Career Development Award/15/CDA/3640/IE/PROgrammable multicarrier Transmitter for flexible Optical Networks (PROTON)/ en

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