Sampaolo, AngeloPatimisco, PietroGluszek, AleksanderHudzikowski, ArkadiuszGiglio, MarilenaZheng, HuadanTittel, Frank K.Spagnolo, Vincenzo2017-02-082017-02-082017Sampaolo, Angelo, Patimisco, Pietro, Gluszek, Aleksander, et al.. "Low power consumption quartz-enhanced photoacoustic gas sensor employing a quantum cascade laser in pulsed operation." <i>Proceedings of SPIE,</i> 10111, (2017) SPIE: http://dx.doi.org/10.1117/12.2252326.https://hdl.handle.net/1911/93862We report here an analysis of the performance of a quartz-enhanced photoacoustic (QEPAS) system operating in a pulsed mode by employing a quantum cascade laser (QCL). The QEPAS system is based on a quartz tuning fork (QTF) having fundamental resonance frequency of 4.2 kHz and a first overtone resonance of 25.4 KHz. Water vapor was used as a target gas by selecting its absorption line falling at 1296.5 cm-1 with a line strength of 1.69⋅10-22 cm/molecule. The QEPAS signal was investigated, while varying the QCL duty-cycle from continuous wave operation, down to 5%, which corresponds to a laser power consumption of 0.17 mW and a pulse-width of 4 μs.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlequartz tuning forkphotoacoustic spectroscopyquantum cascade lasergas sensinghttp://dx.doi.org/10.1117/12.2252326