Compact sensor for wide concentration range methane and ethane detection employing quartz tuning fork as photodetector in tunable diode laser spectroscopy

Andrea Zifarelli; Stefano Dello Russo; Giansergio Menduni; Marilena Giglio; Pietro Patimisco; Angelo Sampaolo; Vincenzo Spagnolo

doi:10.1117/12.2608338

5 March 2022 Compact sensor for wide concentration range methane and ethane detection employing quartz tuning fork as photodetector in tunable diode laser spectroscopy

Andrea Zifarelli, Stefano Dello Russo, Giansergio Menduni, Marilena Giglio, Pietro Patimisco, Angelo Sampaolo, Vincenzo Spagnolo

Author Affiliations +

Proceedings Volume 12009, Quantum Sensing and Nano Electronics and Photonics XVIII; 120090J (2022) https://doi.org/10.1117/12.2608338
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We report on a sensor for methane (C1) and ethane (C2) detection employing a quartz tuning fork as a photodetector for tunable diode laser spectroscopy (TDLAS). In this configuration, the QTF is immersed in the gas mixture under investigation within a vacuum-tight cell. Concentrations of methane and ethane in nitrogen-based mixtures ranged from traces up to percent. An interband cascade laser emitting at 3.345 μm was used as light source. Natural gas-like mixtures were generated in 1:10 nitrogen dilution, and gas mixtures composition was retrieved with an accuracy >98%. Decreasing the target gases concentration, minimum detection limits of 770 ppb and 75 ppb for C1 and C2, respectively, were measured at 10 s integration time.

Conference Presentation

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Andrea Zifarelli, Stefano Dello Russo, Giansergio Menduni, Marilena Giglio, Pietro Patimisco, Angelo Sampaolo, and Vincenzo Spagnolo "Compact sensor for wide concentration range methane and ethane detection employing quartz tuning fork as photodetector in tunable diode laser spectroscopy", Proc. SPIE 12009, Quantum Sensing and Nano Electronics and Photonics XVIII, 120090J (5 March 2022); https://doi.org/10.1117/12.2608338

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