Amplitude-modulated cavity-enhanced absorption spectroscopy with phase-sensitive detection: A new approach applied to the fast and sensitive detection of NO2

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dc.contributor.authorZhou, Jiacheng
dc.contributor.authorZhao, Weixiong
dc.contributor.authorZhang, Yang
dc.contributor.authorFang, Bo
dc.contributor.authorCheng, Feihu
dc.contributor.authorXu, Xuezhe
dc.contributor.authorNi, Shichuan
dc.contributor.authorZhang, Weijun
dc.contributor.authorYe, Chunxiang
dc.contributor.authorChen, Weidong
dc.contributor.authorVenables, Dean S.
dc.contributor.funderNational Natural Science Foundation of Chinaen
dc.contributor.funderYouth Innovation Promotion Association of the Chinese Academy of Sciencesen
dc.contributor.funderSecond Tibetan Plateau Scientific Expedition and Researchen
dc.contributor.funderInstrument Developing Project of the Chinese Academy of Sciencesen
dc.contributor.funderHefei Institutes of Physical Science, Chinese Academy of Sciencesen
dc.date.accessioned2022-03-03T10:31:18Z
dc.date.available2022-03-03T10:31:18Z
dc.date.issued2022-02-10
dc.date.updated2022-03-03T10:02:36Z
dc.description.abstractAccurate and sensitive measurements of NO2 play an extremely important role in atmospheric studies. Increasingly, studies require NO2 measurements with parts per trillion by volume (pptv-level) detection limits. Other desirable instrument attributes include ease of use, long-term stability, and low maintenance. In this work, we report the development of an amplitude-modulated multimode-diode-laser-based cavity-enhanced absorption spectroscopy (AM-CEAS) system operating at 406 nm that uses phase-sensitive detection for extremely sensitive NO2 detection. The laser was TTL-modulated at 35 kHz. The mirror reflectivity was determined to be 99.985% based on the ring-down time measurement. The cavity base length was 47.5 cm, giving an effective absorption pathlength of ∼3.26 km. AM-CEAS achieved a 1σ detection precision of 35 pptv in a 1 s data acquisition time (4.98 × 10–10 cm–1), over 4 times lower than that attained using a ring-down approach and the same optical system. The AM-CEAS precision improved to 8 pptv over a data acquisition time of 30 s (1.14 × 10–10 cm–1). The AM-CEAS method with the multimode diode laser integrates the advantages of high light injection efficiency like on-axis alignment cavity ring-down spectroscopy, low cavity-mode noise like off-axis alignment CEAS, and narrow-bandwidth high-sensitivity weak signal detection of modulation spectroscopy, providing a powerful, straightforward, and general method for ultrasensitive absorption and extinction measurements.en
dc.description.sponsorshipNational Natural Science Foundation of China (42022051; U21A2028; 41627810); Second Tibetan Plateau Scientific Expedition and Research (2019QZKK0606); Youth Innovation Promotion Association of Chinese Academy of Sciences (Y202089); Instrument Developing Project of the Chinese Academy of Sciences (YJ KYYQ20180049); Hefei Institutes of Physical Science, Chinese Academy of Sciences (Director’s Fund YZJJ202101; BJPY2019B02)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationZhou, J., Zhao, W., Zhang, Y., Fang, B., Cheng, F., Xu, X., Ni, S.,Zhang, W., Ye, C., Chen, W. and Venables, D. S. (2021) 'Amplitude-modulated cavity-enhanced absorption spectroscopy with phase-sensitive detection: A new approach applied to the fast and sensitive detection of NO2', Analytical Chemistry, 94(7), pp. 3368-3375. doi: 10.1021/acs.analchem.1c05484en
dc.identifier.doi10.1021/acs.analchem.1c05484en
dc.identifier.eissn1520-6882
dc.identifier.endpage3375en
dc.identifier.issn0003-2700
dc.identifier.issued7en
dc.identifier.journaltitleAnalytical Chemistryen
dc.identifier.startpage3368en
dc.identifier.urihttps://hdl.handle.net/10468/12711
dc.identifier.volume94en
dc.language.isoenen
dc.publisherACS Publicationsen
dc.rights© 2022, American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Analytical Chemistry, after technical editing by the publisher. To access the final edited and published work see: https://doi.org/10.1021/acs.analchem.1c05484en
dc.subjectAmplitude-modulated multimode-diode-laser-based cavity-enhanced absorption spectroscopy systemen
dc.subjectAM-CEASen
dc.subjectNO2en
dc.titleAmplitude-modulated cavity-enhanced absorption spectroscopy with phase-sensitive detection: A new approach applied to the fast and sensitive detection of NO2en
dc.typeArticle (peer-reviewed)en
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