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 CH20 is found, using distributed feedback QCLs operating in pulsed mode at 5.34 μm and 5.6 μm, respectively
Trace gas sensing using quantum cascade lasers and optoacoustic detection / Spagnolo, Vincenzo Luigi; Elia, A.; Franco, C. D.; Lugarà, P. M.; Vitiello, M. S.; Scamarcio, G.. - 7222:(2009). (Intervento presentato al convegno Photonic West 2009 tenutosi a San Jose, CA nel January 25-28, 2009) [10.1117/12.813678].
Trace gas sensing using quantum cascade lasers and optoacoustic detection
SPAGNOLO, Vincenzo Luigi;
2009-01-01
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 CH20 is found, using distributed feedback QCLs operating in pulsed mode at 5.34 μm and 5.6 μm, respectivelyI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
