Intracavity quartz-enhanced photoacoustic spectroscopy for CO/N2O detection in the part-per-trillion concentration range

Jakob Hayden; Marilena Giglio; Angelo Sampaolo; Pietro Patimisco; Vincenzo Spagnolo; Bernhard Lendl

doi:10.1117/12.2545796

31 January 2020 Intracavity quartz-enhanced photoacoustic spectroscopy for CO/N₂O detection in the part-per-trillion concentration range

Jakob Hayden, Marilena Giglio, Angelo Sampaolo, Pietro Patimisco, Vincenzo Spagnolo, Bernhard Lendl

Author Affiliations +

Proceedings Volume 11288, Quantum Sensing and Nano Electronics and Photonics XVII; 1128821 (2020) https://doi.org/10.1117/12.2545796
Event: SPIE OPTO, 2020, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Jakob Hayden, Marilena Giglio, Angelo Sampaolo, Pietro Patimisco, Vincenzo Spagnolo, and Bernhard Lendl "Intracavity quartz-enhanced photoacoustic spectroscopy for CO/N₂O detection in the part-per-trillion concentration range", Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 1128821 (31 January 2020); https://doi.org/10.1117/12.2545796

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