We report on a quartz-enhanced photoacoustic (QEPAS) sensor employing a monolithic distributed-feedback quantum cascade laser array operating in a pulsed mode as a light source. The array consists of 32 quantum cascade lasers emitting in a spectral range from 1190 cm(-1) to 1340 cm(-1), which covers two absorption branches of nitrous oxide (N2O) and several absorption features of (CH4). The versatility of the QEPAS technique combined with the rapid wavelength tuning provided by the ultra-compact, low-power consuming laser source allowed the detection of N2O and CH4 with detection sensitivities below a part-per-million at atmospheric pressure.
Quartz-enhanced photoacoustic spectroscopy employing a distributed feedback-quantum cascade laser array for nitrous oxide and methane broadband detection
Patimisco, P.;Zifarelli, A.;Elefante, A.;Passaro, V.;
2019-01-01
Abstract
We report on a quartz-enhanced photoacoustic (QEPAS) sensor employing a monolithic distributed-feedback quantum cascade laser array operating in a pulsed mode as a light source. The array consists of 32 quantum cascade lasers emitting in a spectral range from 1190 cm(-1) to 1340 cm(-1), which covers two absorption branches of nitrous oxide (N2O) and several absorption features of (CH4). The versatility of the QEPAS technique combined with the rapid wavelength tuning provided by the ultra-compact, low-power consuming laser source allowed the detection of N2O and CH4 with detection sensitivities below a part-per-million at atmospheric pressure.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
