Portable broadband cavity-enhanced spectrometer utilizing Kalman filtering: application to real-time, in situ monitoring of glyoxal and nitrogen dioxide

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dc.contributor.author Fang, Bo
dc.contributor.author Zhao, Weixiong
dc.contributor.author Xu, Xuezhe
dc.contributor.author Zhou, Jiacheng
dc.contributor.author Ma, Xiao
dc.contributor.author Wang, Shuo
dc.contributor.author Zhang, Weijun
dc.contributor.author Venables, Dean S.
dc.contributor.author Chen, Weidong
dc.date.accessioned 2018-09-24T12:37:01Z
dc.date.available 2018-09-24T12:37:01Z
dc.date.issued 2017
dc.identifier.citation Fang, B., Zhao, W., Xu, X., Zhou, J., Ma, X., Wang, S., Zhang, W., Venables, D. S. and Chen, W. (2017) 'Portable broadband cavity-enhanced spectrometer utilizing Kalman filtering: application to real-time, in situ monitoring of glyoxal and nitrogen dioxide', Optics Express, 25(22), pp. 26910-26922. doi: 10.1364/OE.25.026910 en
dc.identifier.volume 25
dc.identifier.issued 22
dc.identifier.startpage 26910
dc.identifier.endpage 26922
dc.identifier.issn 1094-4087
dc.identifier.uri http://hdl.handle.net/10468/6885
dc.identifier.doi 10.1364/OE.25.026910
dc.description.abstract This article describes the development and field application of a portable broadband cavity enhanced spectrometer (BBCES) operating in the spectral range of 440-480 nm for sensitive, real-time, in situ measurement of ambient glyoxal (CHOCHO) and nitrogen dioxide (NO2). The instrument utilized a custom cage system in which the same SMA collimators were used in the transmitter and receiver units for coupling the LED light into the cavity and collecting the light transmitted through the cavity. This configuration realised a compact and stable optical system that could be easily aligned. The dimensions and mass of the optical layer were 676 × 74 × 86 mm3 and 4.5 kg, respectively. The cavity base length was about 42 cm. The mirror reflectivity at λ = 460 nm was determined to be 0.9998, giving an effective absorption pathlength of 2.26 km. The demonstrated measurement precisions (1σ) over 60 s were 28 and 50 pptv for CHOCHO and NO2 and the respective accuracies were 5% and 4%. By applying a Kalman adaptive filter to the retrieved concentrations, the measurement precisions of CHOCHO and NO2 were improved to 8 pptv and 40 pptv in 21 s. en
dc.description.sponsorship National Key Research and Development Program of China (2016YFC0202205); National Natural Science Foundation of China (41375127); Natural Science Foundation of Anhui Province (1508085J03); Youth Innovation Promotion Association of the Chinese Academy of Sciences (2016383); China Special Fund for Meteorological Research in the Public Interest (GYHY201406039) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Optical Society of America en
dc.relation.uri https://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-22-26910
dc.rights © 2017, Optical Society of America under the terms of the OSA Open Access Publishing Agreement en
dc.subject Portable broadband cavity enhanced spectrometer en
dc.subject BBCES en
dc.title Portable broadband cavity-enhanced spectrometer utilizing Kalman filtering: application to real-time, in situ monitoring of glyoxal and nitrogen dioxide 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.description.version Published Version en
dc.contributor.funder China Special Fund for Meteorological Research in the Public Interest
dc.contributor.funder Youth Innovation Promotion Association of the Chinese Academy of Sciences
dc.contributor.funder Natural Science Foundation of Anhui Province
dc.contributor.funder National Natural Science Foundation of China
dc.contributor.funder National Key Research and Development Program of China
dc.description.status Peer reviewed en
dc.identifier.journaltitle Optics Express en
dc.internal.IRISemailaddress d.venables@ucc.ie en


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