Comb segmentation spectroscopy for rapid detection of molecular absorption lines

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We perform fast comb spectroscopy by dividing the probe comb into several sub-comb segments so as to produce multi-heterodyne beats focused around targeted molecular absorption lines. This concentrated scheme of comb spectroscopy is able to achieve a 30 dB signal-to-noise ratio with just a single shot measurement of 10 mu s acquisition time. Such high signal sensitivity is Verified by measuring separate absorption lines of (HCN)-C-13-N-14 and (CO2)-C-12 gases simultaneously. In addition, atmospheric (CO2)-C-12 concentration over a 1.3 km open-air path is traced with a signal repeatability of 15 ppm at a 5 kHz update rate. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Publisher
OPTICAL SOC AMER
Issue Date
2019-03
Language
English
Article Type
Article
Citation

OPTICS EXPRESS, v.27, no.6, pp.9088 - 9096

ISSN
1094-4087
DOI
10.1364/OE.27.009097
URI
http://hdl.handle.net/10203/253973
Appears in Collection
ME-Journal Papers(저널논문)
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