Improving the accuracy and precision of broadband optical cavity measurements

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dc.contributor.authorChen, Jun
dc.contributor.authorFullam, Donovan P.
dc.contributor.authorYu, Shuaishuai
dc.contributor.authorBöge, Olaf
dc.contributor.authorLe, Phuoc Hoa
dc.contributor.authorHerrmann, Hartmut
dc.contributor.authorVenables, Dean S.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderNational Natural Science Foundation of Chinaen
dc.date.accessioned2019-05-07T11:07:18Z
dc.date.available2019-05-07T11:07:18Z
dc.date.issued2019-04-10
dc.date.updated2019-05-07T10:31:56Z
dc.description.abstractMost extinction measurements require a stable light source to attain high precision and accuracy. Here, we present a convenient approach to normalize light source intensity in broadband optical cavity measurements. In the absence of sample extinction, we show that the in-band signal – the high finesse spectral region of the optical cavity in which sample extinction is measured with high sensitivity – is strongly correlated with the out-of-band signal. The out-of-band signal is insensitive to sample extinction and can act as a proxy for light source intensity. This normalization approach strongly suppressed in-band intensity changes in two incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) instruments with dissimilar light sources and optical cavity properties. Intensity fluctuations in an arc lamp system were suppressed by a factor of 7 to 16 and in the LED spectrometer by a factor of 10. This approach therefore improves the accuracy and precision of extinction measurements where either property is limited by the light source stability.en
dc.description.sponsorshipNational Natural Science Foundation of China (91544225)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationChen, J., Fullam, D. P., Yu, S., Böge, O., Le, P. H., Herrmann, H. and Venables, D. S. (2019) 'Improving the accuracy and precision of broadband optical cavity measurements', Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 218, pp. 178-183. doi: 10.1016/j.saa.2019.04.015en
dc.identifier.doi10.1016/j.saa.2019.04.015en
dc.identifier.eissn1873-3557
dc.identifier.endpage183en
dc.identifier.issn1386-1425
dc.identifier.journaltitleSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopyen
dc.identifier.startpage178en
dc.identifier.urihttps://hdl.handle.net/10468/7856
dc.identifier.volume218en
dc.language.isoenen
dc.publisherElsevier B.V.en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Frontiers Programme (RFP)/11/RFP.1/GEO/3200/IE/A steeply rising tail: Quantifying the absorption of organic aerosols in the near-ultraviolet/en
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S1386142519303907
dc.rights© 2019, Elsevier B.V. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectNormalizationen
dc.subjectBroadband optical cavityen
dc.subjectAtmosphericen
dc.subjectUV/visibleen
dc.subjectAerosolen
dc.subjectGasesen
dc.titleImproving the accuracy and precision of broadband optical cavity measurementsen
dc.typeArticle (peer-reviewed)en
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Fig. S1. Optical and sample handling configuration of the LED IBBCEAS instrument
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