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.authorFang, Bo
dc.contributor.authorZhao, Weixiong
dc.contributor.authorXu, Xuezhe
dc.contributor.authorZhou, Jiacheng
dc.contributor.authorMa, Xiao
dc.contributor.authorWang, Shuo
dc.contributor.authorZhang, Weijun
dc.contributor.authorVenables, Dean S.
dc.contributor.authorChen, Weidong
dc.contributor.funderChina Special Fund for Meteorological Research in the Public Interest
dc.contributor.funderYouth Innovation Promotion Association of the Chinese Academy of Sciences
dc.contributor.funderNatural Science Foundation of Anhui Province
dc.contributor.funderNational Natural Science Foundation of China
dc.contributor.funderNational Key Research and Development Program of China
dc.date.accessioned2018-09-24T12:37:01Z
dc.date.available2018-09-24T12:37:01Z
dc.date.issued2017
dc.description.abstractThis 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.sponsorshipNational 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.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationFang, 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.25.026910en
dc.identifier.doi10.1364/OE.25.026910
dc.identifier.endpage26922
dc.identifier.issn1094-4087
dc.identifier.issued22
dc.identifier.journaltitleOptics Expressen
dc.identifier.startpage26910
dc.identifier.urihttps://hdl.handle.net/10468/6885
dc.identifier.volume25
dc.language.isoenen
dc.publisherOptical Society of Americaen
dc.relation.urihttps://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 Agreementen
dc.subjectPortable broadband cavity enhanced spectrometeren
dc.subjectBBCESen
dc.titlePortable broadband cavity-enhanced spectrometer utilizing Kalman filtering: application to real-time, in situ monitoring of glyoxal and nitrogen dioxideen
dc.typeArticle (peer-reviewed)en
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