Continuous wave, thermoelectrically cooled, quantum cascade laser based sensor platform for the quantitative detection of exhaled human breath is reported. The sensor is based on a 2f wavelength modulation quartz enhanced photoacoustic spectroscopy (QEPAS) technique, which is very well suited for real time breath analysis, due to the fast gas exchange inside a compact QEPAS gas cell. The quantum cascade laser has be designed to target the interference-free NO absorption line at 1900.075 cm1. A 1s minimum detectable concentration of 8 parts per billion in volume with 1 sec time resolution was obtained. Preliminary breath test demonstrated extremely fast response and fast signal decay
Quantum-cascade-laser-based optoacoustic detection for breath sensor applications / Spagnolo, Vincenzo Luigi; Lewicki, R.; Dong, L.; Tittel, F. K.. - STAMPA. - (2011), pp. 332-335. (Intervento presentato al convegno IEEE International Symposium on Medical Measurements and Applications, MeMeA 2011 tenutosi a Bari, Italy nel May 30-31, 2011) [10.1109/MeMeA.2011.5966773].
Quantum-cascade-laser-based optoacoustic detection for breath sensor applications
SPAGNOLO, Vincenzo Luigi;
2011-01-01
Abstract
Continuous wave, thermoelectrically cooled, quantum cascade laser based sensor platform for the quantitative detection of exhaled human breath is reported. The sensor is based on a 2f wavelength modulation quartz enhanced photoacoustic spectroscopy (QEPAS) technique, which is very well suited for real time breath analysis, due to the fast gas exchange inside a compact QEPAS gas cell. The quantum cascade laser has be designed to target the interference-free NO absorption line at 1900.075 cm1. A 1s minimum detectable concentration of 8 parts per billion in volume with 1 sec time resolution was obtained. Preliminary breath test demonstrated extremely fast response and fast signal decayI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
