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

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dc.citation.articleNumber2792
dc.citation.issueNumber12
dc.citation.journalTitleSensors
dc.citation.volumeNumber17
dc.contributor.authorHe, Qixin
dc.contributor.authorLou, Minhan
dc.contributor.authorZheng, Chuantao
dc.contributor.authorYe, Weilin
dc.contributor.authorWang, Yiding
dc.contributor.authorTittel, Frank K.
dc.date.accessioned2017-12-19T15:24:10Z
dc.date.available2017-12-19T15:24:10Z
dc.date.issued2017
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.
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.
dc.identifier.digitalsensors-17-02792
dc.identifier.doihttps://doi.org/10.3390/s17122792
dc.identifier.urihttps://hdl.handle.net/1911/98898
dc.language.isoeng
dc.publisherMDPI
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).
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.keywordinfrared absorption spectroscopy
dc.subject.keywordcavity enhanced absorption spectroscopy
dc.subject.keywordgas sensor
dc.titleRepetitively Mode-Locked Cavity-Enhanced Absorption Spectroscopy (RML-CEAS) for Near-Infrared Gas Sensing
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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