Trace gas sensing using quantum cascade lasers and optoacoustic detection

Vincenzo Spagnolo; Angela Elia; Cinzia Di Franco; Pietro Mario Lugarà; Miriam S. Vitiello; Gaetano Scamarcio

doi:10.1117/12.813678

26 January 2009 Trace gas sensing using quantum cascade lasers and optoacoustic detection

Vincenzo Spagnolo, Angela Elia, Cinzia Di Franco, Pietro Mario Lugarà, Miriam S. Vitiello, Gaetano Scamarcio

Proceedings Volume 7222, Quantum Sensing and Nanophotonic Devices VI; 72220K (2009) https://doi.org/10.1117/12.813678
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

We report on the realization of a optoacoustic sensor based on mid-infrared quantum-cascade lasers (QCLs) for the detection of nitric oxide (NO) and formaldehyde (CH₂O). A resonant photoacoustic cell equipped with 4 electret microphones was excited in its first longitudinal mode by the modulated laser light. A detection limit for of 300 parts in 10⁹ (ppbv) for NO and 150 ppbv for CH₂O is found, using distributed feedback QCLs operating in pulsed mode at 5.34 μm and 5.6 μm, respectively.

Citation Download Citation

Vincenzo Spagnolo, Angela Elia, Cinzia Di Franco, Pietro Mario Lugarà, Miriam S. Vitiello, and Gaetano Scamarcio "Trace gas sensing using quantum cascade lasers and optoacoustic detection", Proc. SPIE 7222, Quantum Sensing and Nanophotonic Devices VI, 72220K (26 January 2009); https://doi.org/10.1117/12.813678

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