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dc.contributor.authorAlquaity, Awad
dc.contributor.authorAlsaif, Bidoor
dc.contributor.authorFarooq, Aamir
dc.date.accessioned2017-10-11T12:03:22Z
dc.date.available2017-10-11T12:03:22Z
dc.date.issued2017-12-07
dc.identifier.citationAlquaity A, Al-Saif B, Farooq A (2017) Widely-tunable and sensitive optical sensor for multi-species detection in the mid-IR. Measurement Science and Technology. Available: http://dx.doi.org/10.1088/1361-6501/aa912b.
dc.identifier.issn0957-0233
dc.identifier.issn1361-6501
dc.identifier.doi10.1088/1361-6501/aa912b
dc.identifier.urihttp://hdl.handle.net/10754/625859
dc.description.abstractPulsed cavity ringdown spectroscopy (CRDS) technique was used to develop a novel widely-tunable laser-based sensor for sensitive measurements of ethylene, propene, 1-butene and allene in the mid-IR. The use of an external-cavity quantum cascade laser (EC-QCL) enabled the sensor to cover a wide wavelength range from 10 to 11.1 µm (900 – 1000 cm-1) to detect multiple gases relevant to combustion and environment. The sensor operation was validated in a room-temperature static cell using well-characterized absorption lines of carbon dioxide near 938.69 cm-1 and 974.62 cm-1. Detection limits for ethylene, propene, 1-butene, and allene were measured to be 17, 134, 754 and 378 ppb, respectively, at 296 K and 760 Torr for a single-pass path-length of 70 cm. The excellent sensitivity of the optical sensor enabled it to measure the aforementioned gases at levels smaller than 1% of their recommended exposure limits. To the best of our knowledge, this is one of the first successful applications of the pulsed CRDS technique to measure trace levels of multiple gases in the 10 – 11 µm wavelength region.
dc.description.sponsorshipResearch reported in this publication was funded by King Abdullah University of Science and Technology (KAUST) under the competitive center funding (CCF) program.
dc.publisherIOP Publishing
dc.relation.urlhttp://iopscience.iop.org/article/10.1088/1361-6501/aa912b
dc.rightsThis is an author-created, un-copyedited version of an article accepted for publication/published in Measurement Science and Technology. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://doi.org/10.1088/1361-6501/aa912b. As the Version of Record of this article is going to be/has been published on a subscription basis, this Accepted Manuscript will be available for reuse under a CC BY-NC-ND 3.0 licence after a 12 month embargo period.
dc.titleWidely-tunable and sensitive optical sensor for multi-species detection in the mid-IR
dc.typeArticle
dc.contributor.departmentChemical Kinetics & Laser Sensors Laboratory
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalMeasurement Science and Technology
dc.eprint.versionPost-print
kaust.personAlquaity, Awad
kaust.personAlsaif, Bidoor
kaust.personFarooq, Aamir
refterms.dateFOA2018-10-05T00:00:00Z
dc.date.published-online2017-12-07
dc.date.published-print2018-01-01


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