Hybrid Faraday rotation spectrometer for subppm detection of atmospheric O2

Eric J. Zhang; Brian Brumfield; Gerard Wysocki

doi:10.1364/OE.22.015957

Hybrid Faraday rotation spectrometer for subppm detection of atmospheric O₂

Eric J. Zhang
, Brian Brumfield
, Gerard Wysocki

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

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.

Original language	English (US)
Pages (from-to)	15957-15968
Number of pages	12
Journal	Optics Express
Volume	22
Issue number	13
DOIs	https://doi.org/10.1364/OE.22.015957
State	Published - Jun 30 2014

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1364/OE.22.015957

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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.",

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AU - Zhang, Eric J.

AU - Brumfield, Brian

AU - Wysocki, Gerard

PY - 2014/6/30

Y1 - 2014/6/30

N2 - 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.

AB - 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.

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Hybrid Faraday rotation spectrometer for subppm detection of atmospheric O₂

Abstract

All Science Journal Classification (ASJC) codes

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