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 2.91 THz. H2S absorption features with line-strength up to ~10-21 cm/mol were selected and QEPAS normalized noise-equivalent absorption in the 10-9 W•cm-1•Hz-1/2 range was achieved.
Quartz-Enhanced Photoacoustic sensors for H2S trace gas detection / Spagnolo, Vincenzo Luigi; Patimisco, P.; Sampaolo, A.; Pennetta, R.; Siciliani de Cumis, M.; Viciani, S.; Borri, S.; De Natale, P.; D'Amato, F.; Vitiello, M. S.; Scamarcio, G.. - 9370:(2015). (Intervento presentato al convegno Conference on Quantum Sensing and Nanophotonic Devices XII tenutosi a San Francisco, CA nel Feruary 08-12, 2015) [10.1117/12.2078929].
Quartz-Enhanced Photoacoustic sensors for H2S trace gas detection
SPAGNOLO, Vincenzo Luigi;Patimisco P.;
2015-01-01
Abstract
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 2.91 THz. H2S absorption features with line-strength up to ~10-21 cm/mol were selected and QEPAS normalized noise-equivalent absorption in the 10-9 W•cm-1•Hz-1/2 range was achieved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
