Repetitively Mode-Locked Cavity-Enhanced Absorption Spectroscopy (RML-CEAS) for Near-Infrared Gas Sensing

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dc.citation.articleNumber2792en_US
dc.citation.issueNumber12en_US
dc.citation.journalTitleSensorsen_US
dc.citation.volumeNumber17en_US
dc.contributor.authorHe, Qixinen_US
dc.contributor.authorLou, Minhanen_US
dc.contributor.authorZheng, Chuantaoen_US
dc.contributor.authorYe, Weilinen_US
dc.contributor.authorWang, Yidingen_US
dc.contributor.authorTittel, Frank K.en_US
dc.date.accessioned2017-12-19T15:24:10Zen_US
dc.date.available2017-12-19T15:24:10Zen_US
dc.date.issued2017en_US
dc.description.abstractA Pound-Drever-Hall (PDH)-based mode-locked cavity-enhanced sensor system was developed using a distributed feedback diode laser centered at 1.53 µm as the laser source. Laser temperature scanning, bias control of the piezoelectric ceramic transducer (PZT) and proportional-integral-derivative (PID) feedback control of diode laser current were used to repetitively lock the laser modes to the cavity modes. A gas absorption spectrum was obtained by using a series of absorption data from the discrete mode-locked points. The 15 cm-long Fabry-Perot cavity was sealed using an enclosure with an inlet and outlet for gas pumping and a PZT for cavity length tuning. The performance of the sensor system was evaluated by conducting water vapor measurements. A linear relationship was observed between the measured absorption signal amplitude and the H2O concentration. A minimum detectable absorption coefficient of 1.5 × 10–8 cm–1 was achieved with an averaging time of 700 s. This technique can also be used for the detection of other trace gas species by targeting the corresponding gas absorption line.en_US
dc.identifier.citationHe, Qixin, Lou, Minhan, Zheng, Chuantao, et al.. "Repetitively Mode-Locked Cavity-Enhanced Absorption Spectroscopy (RML-CEAS) for Near-Infrared Gas Sensing." <i>Sensors,</i> 17, no. 12 (2017) MDPI: https://doi.org/10.3390/s17122792.en_US
dc.identifier.digitalsensors-17-02792en_US
dc.identifier.doihttps://doi.org/10.3390/s17122792en_US
dc.identifier.urihttps://hdl.handle.net/1911/98898en_US
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.rightsThis is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.subject.keywordinfrared absorption spectroscopyen_US
dc.subject.keywordcavity enhanced absorption spectroscopyen_US
dc.subject.keywordgas sensoren_US
dc.titleRepetitively Mode-Locked Cavity-Enhanced Absorption Spectroscopy (RML-CEAS) for Near-Infrared Gas Sensingen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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