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Proceedings Paper

Intracavity quartz-enhanced photoacoustic spectroscopy for CO/N2O detection in the part-per-trillion concentration range
Author(s): Jakob Hayden; Marilena Giglio; Angelo Sampaolo; Pietro Patimisco; Vincenzo Spagnolo; Bernhard Lendl
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Paper Abstract

A mid-infrared gas sensor based on intracavity quartz-enhanced photoacoustic spectroscopy (I-QEPAS) and a custom quartz tuning fork is here reported. A 4.59 μm distributed feedback quantum cascade laser was optically coupled into a high-finesse Brewster window linear optical cavity. A power enhancement factor of ~ 250 has been achieved. A spectrophone composed of a custom tuning fork having 1.5 mm prong spacing, acoustically coupled with a pair of micro-resonator tubes, was placed in the focal point of the high-finesse cavity. The sensor was calibrated for humidified carbon monoxide and nitrous oxide detection. Gas concentration sensitivities in the part-per-trillion range were achieved for both gas species.

Paper Details

Date Published: 31 January 2020
PDF: 6 pages
Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 1128821 (31 January 2020); doi: 10.1117/12.2545796
Show Author Affiliations
Jakob Hayden, Technische Univ. Wien (Austria)
Marilena Giglio, Univ. and Politecnico of Bari, IFN-CNR (Italy)
Angelo Sampaolo, Univ. and Politecnico of Bari, IFN-CNR (Italy)
Pietro Patimisco, Univ. and Politecnico of Bari, IFN-CNR (Italy)
Vincenzo Spagnolo, Univ. and Politecnico of Bari, IFN-CNR (Italy)
Bernhard Lendl, Technische Univ. Wien (Austria)

Published in SPIE Proceedings Vol. 11288:
Quantum Sensing and Nano Electronics and Photonics XVII
Manijeh Razeghi; Jay S. Lewis; Giti A. Khodaparast; Pedram Khalili, Editor(s)

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