Compact laser spectroscopy-based sensor using a transformer-based model for analysis of multiple molecules

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dc.contributor.authorBayraklı, İsmail
dc.contributor.authorEken, Enes
dc.date.accessioned2024-09-30T06:34:13Z
dc.date.available2024-09-30T06:34:13Z
dc.date.issued2024
dc.departmentMühendislik Fakültesi
dc.description.abstractInterest in the development of compact sensors that consume low energy is increasing day by day. This study reports, to our knowledge, such a novel sensor system that can analyze multiple molecules simultaneously with high sensitivity under ambient conditions (900 mbar and 300 K). To quantify molecules, a distributed feedback quantum cascade laser (DFB QCL) was combined with a compact multi-pass absorption (mpass) cell without the need for vacuum components, lock-in amplifier, or any electric filters. By using a transformer-encoder-based model, the noise level was reduced and the pressure-broadened absorption lines of the molecules were separated, narrowed (resolved), and displayed one by one. In this way, molecules can be quantified using pressure-broadened overlapping absorption lines under ambient conditions. To test our sensor system, CO2 and N2O molecules were used. Depending on the concentration values, SNR can be improved by up to 50 times. Better results are obtained at higher concentration values. Detection limits for N2O and CO2 molecules were determined to be 30 ppb and 180 ppm, respectively. The analysis time of molecules is around 80 ms.
dc.identifier.doi10.1364/AO.534782
dc.identifier.endpage6947en_US
dc.identifier.issn1559-128X
dc.identifier.issue26en_US
dc.identifier.scopusqualityQ2
dc.identifier.startpage6941en_US
dc.identifier.urihttps:/dx.doi.org/10.1364/AO.534782
dc.identifier.urihttps://hdl.handle.net/20.500.12451/12497
dc.identifier.volume63en_US
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherOptica Publishing Group (formerly OSA)
dc.relation.ispartofApplied Optics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectDistributed Feedback Lasers
dc.subjectFeedback Amplifiers
dc.subjectLaser Mode Locking
dc.subjectQ Switched Lasers
dc.titleCompact laser spectroscopy-based sensor using a transformer-based model for analysis of multiple molecules
dc.typeArticle

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