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Hybrid Faraday rotation spectrometer for sub-ppm detection of atmospheric O_2

Author(s): Zhang, Eric J; Brumfield, Brian; Wysocki, Gerard

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Abstract: Faraday rotation spectroscopy (FRS) of O2 is performed at atmospheric conditions using a DFB diode laser and permanent rare-earth magnets. Polarization rotation is detected with a hybrid-FRS detection method that combines the advantages of two conventional approaches: balanced optical-detection and conventional FRS with an optimized analyzer offset angle for maximum sensitivity enhancement. A measurement precision of 0.6 ppmv·Hz-1/2 for atmospheric O2 has been achieved. The theoretical model of hybrid detection is described, and the calculated detection limits are in excellent agreement with experimental values.
Publication Date: 30-Jun-2014
Electronic Publication Date: 20-Jun-2014
Citation: Zhang, Eric J, Brumfield, Brian, Wysocki, Gerard. (2014). Hybrid Faraday rotation spectrometer for sub-ppm detection of atmospheric O_2. Optics Express, 22 (13), 15957 - 15957. doi:10.1364/OE.22.015957
DOI: doi:10.1364/OE.22.015957
EISSN: 1094-4087
Pages: 15957 - 15957
Type of Material: Journal Article
Journal/Proceeding Title: Optics Express
Version: Final published version. This is an open access article.

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