Improving the accuracy and precision of broadband optical cavity measurements

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dc.contributor.author Chen, Jun
dc.contributor.author Fullam, Donovan P.
dc.contributor.author Yu, Shuaishuai
dc.contributor.author Böge, Olaf
dc.contributor.author Le, Phuoc Hoa
dc.contributor.author Herrmann, Hartmut
dc.contributor.author Venables, Dean S.
dc.date.accessioned 2019-05-07T11:07:18Z
dc.date.available 2019-05-07T11:07:18Z
dc.date.issued 2019-04-10
dc.identifier.citation Chen, 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.2019.04.015 en
dc.identifier.volume 218 en
dc.identifier.startpage 178 en
dc.identifier.endpage 183 en
dc.identifier.issn 1386-1425
dc.identifier.uri http://hdl.handle.net/10468/7856
dc.identifier.doi 10.1016/j.saa.2019.04.015 en
dc.description.abstract Most 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.sponsorship National Natural Science Foundation of China (91544225) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier B.V. en
dc.relation.uri http://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.uri https://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject Normalization en
dc.subject Broadband optical cavity en
dc.subject Atmospheric en
dc.subject UV/visible en
dc.subject Aerosol en
dc.subject Gases en
dc.title Improving the accuracy and precision of broadband optical cavity measurements en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Dean Venables, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: d.venables@ucc.ie en
dc.internal.availability Full text available en
dc.check.info Access to this article is restricted until 24 months after publication by request of the publisher. en
dc.check.date 2021-04-10
dc.date.updated 2019-05-07T10:31:56Z
dc.description.version Accepted Version en
dc.internal.rssid 484333092
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder National Natural Science Foundation of China en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy en
dc.internal.copyrightchecked Yes
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress d.venables@ucc.ie en
dc.relation.project info: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.identifier.eissn 1873-3557


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© 2019, Elsevier B.V. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license. Except where otherwise noted, this item's license is described as © 2019, Elsevier B.V. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.
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