We report on the realization of an 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 of 150 parts in 109 (ppbv) for NO and CH2O was found, using distributed feedback QCLs operating in pulsed mode at 5.34 mum and 5.62 mum, respectively
Photoacoustic trace gas sensing with mid-IR quantum cascade lasers / Elia, A.; Spagnolo, Vincenzo Luigi; Franco, C. D.; Lugará, P. M.; Scamarcio, G.. - (2009), pp. 46-50. (Intervento presentato al convegno 3rd IEEE International Workshop on Advances in Sensors and Interfaces, IWASI 2009 tenutosi a Trani nel 25-26 June 2009) [10.1109/IWASI.2009.5184766].
Photoacoustic trace gas sensing with mid-IR quantum cascade lasers
SPAGNOLO, Vincenzo Luigi;
2009-01-01
Abstract
We report on the realization of an 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 of 150 parts in 109 (ppbv) for NO and CH2O was found, using distributed feedback QCLs operating in pulsed mode at 5.34 mum and 5.62 mum, respectivelyI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
