THz Quartz-enhanced photoacoustic sensor for H2S trace gas detection
dc.citation.firstpage | 7574 | |
dc.citation.issueNumber | 6 | |
dc.citation.journalTitle | Optics Express | |
dc.citation.lastpage | 7582 | |
dc.citation.volumeNumber | 23 | |
dc.contributor.author | Spagnolo, Vincenzo | |
dc.contributor.author | Patimisco, Pietro | |
dc.contributor.author | Pennetta, Riccardo | |
dc.contributor.author | Sampaolo, Angelo | |
dc.contributor.author | Scamarcio, Gaetano | |
dc.contributor.author | Vitiello, Miriam S. | |
dc.contributor.author | Tittel, Frank K. | |
dc.date.accessioned | 2016-06-22T17:41:38Z | |
dc.date.available | 2016-06-22T17:41:38Z | |
dc.date.issued | 2015 | |
dc.description.abstract | We report on a quartz-enhanced photoacoustic (QEPAS) gas sensing system for hydrogen sulphide (H2S) detection. The system architecture is based on a custom quartz tuning fork (QTF) optoacoustic transducer with a novel geometry and a quantum cascade laser (QCL) emitting 1.1 mW at a frequency of 2.913 THz. The QTF operated on the first flexion resonance frequency of 2871 Hz, with a quality factor Q = 17,900 at 20 Torr. The tuning range of the available QCL allowed the excitation of a H2S rotational absorption line with a line-strength as small as S = 1.13·10−22 cm/mol. The measured detection sensitivity is 30 ppm in 3 seconds and 13 ppm for a 30 seconds integration time, which corresponds to a minimum detectable absorption coefficient αmin = 2.3·10−7 cm−1 and a normalized noise-equivalent absorption NNEA = 4.4·10−10W·cm−1·Hz-1/2, several times lower than the values previously reported for near-IR and mid-IR H2S QEPAS sensors. | |
dc.identifier.citation | Spagnolo, Vincenzo, Patimisco, Pietro, Pennetta, Riccardo, et al.. "THz Quartz-enhanced photoacoustic sensor for H2S trace gas detection." <i>Optics Express,</i> 23, no. 6 (2015) The Optical Society: 7574-7582. http://dx.doi.org/10.1364/OE.23.007574. | |
dc.identifier.doi | http://dx.doi.org/10.1364/OE.23.007574 | |
dc.identifier.uri | https://hdl.handle.net/1911/90525 | |
dc.language.iso | eng | |
dc.publisher | The Optical Society | |
dc.rights | Article 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.title | THz Quartz-enhanced photoacoustic sensor for H2S trace gas detection | |
dc.type | Journal article | |
dc.type.dcmi | Text | |
dc.type.publication | publisher version |
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