Quartz-enhanced photoacoustic spectroscopy employing a distributed feedback-quantum cascade laser array for nitrous oxide and methane broadband detection

M. Giglio; P. Patimisco; A. Sampaolo; A. Zifarelli; G. Menduni; A. Elefante; R. Blanchard; C. Pfluegl; M. F. Witinski; D. Vakhshoori; V. Passaro; F. K. Tittel; V. Spagnolo

doi:10.1117/12.2507926

1 March 2019 Quartz-enhanced photoacoustic spectroscopy employing a distributed feedback-quantum cascade laser array for nitrous oxide and methane broadband detection

M. Giglio, P. Patimisco, A. Sampaolo, A. Zifarelli, G. Menduni, A. Elefante, R. Blanchard, C. Pfluegl, M. F. Witinski, D. Vakhshoori, V. Passaro, F. K. Tittel, V. Spagnolo

Author Affiliations +

Proceedings Volume 10939, Novel In-Plane Semiconductor Lasers XVIII; 109391Q (2019) https://doi.org/10.1117/12.2507926
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

We report on a quartz-enhanced photoacoustic (QEPAS) sensor employing a monolithic distributed-feedback quantum cascade laser array operating in a pulsed mode as a light source. The array consists of 32 quantum cascade lasers emitting in a spectral range from 1190 cm^-1 to 1340 cm^-1, which covers two absorption branches of nitrous oxide (N₂O) and several absorption features of (CH₄). The versatility of the QEPAS technique combined with the rapid wavelength tuning provided by the ultra-compact, low-power consuming laser source allowed the detection of N₂O and CH₄ with detection sensitivities below a part-per-million at atmospheric pressure.

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M. Giglio, P. Patimisco, A. Sampaolo, A. Zifarelli, G. Menduni, A. Elefante, R. Blanchard, C. Pfluegl, M. F. Witinski, D. Vakhshoori, V. Passaro, F. K. Tittel, and V. Spagnolo "Quartz-enhanced photoacoustic spectroscopy employing a distributed feedback-quantum cascade laser array for nitrous oxide and methane broadband detection", Proc. SPIE 10939, Novel In-Plane Semiconductor Lasers XVIII, 109391Q (1 March 2019); https://doi.org/10.1117/12.2507926

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