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8 February 2015 Quartz-enhanced photoacoustic sensors for H2S trace gas detection
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We report on three different quartz enhanced photoacoustic (QEPAS) sensors operating in the near-IR, mid-IR and THz spectral ranges, employing quartz tuning forks of different sizes and shapes. To test our sensors in the near-IR we used a diode laser working at 2.7 μm, while in the mid-IR we employed a quantum cascade laser (QCL) operating at 7.9 μm, fiber-coupled to the QEPAS cell. In the THz range we employed a QCL emitting at 2.95 THz. H2S absorption features with line-strength up to 10-20 cm/mol were selected and QEPAS normalized noise-equivalent absorption in the 10-10 W•cm-1•Hz-1/2 range was achieved..
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vincenzo Spagnolo, Pietro Patimisco, Angelo Sampaolo, Riccardo Pennetta, Mario Siciliani de Cumis, Silvia Viciani, Simone Borri, Paolo De Natale, Francesco D'Amato, Miriam S. Vitiello, and Gaetano Scamarcio "Quartz-enhanced photoacoustic sensors for H2S trace gas detection", Proc. SPIE 9370, Quantum Sensing and Nanophotonic Devices XII, 93700Y (8 February 2015);

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