A gas sensor based on quartz-enhanced photoa-coustic detection and an external cavity quantum cascade laser was realized and characterized for trace nitric oxide monitoring using the NO R(6.5) absorption doublet at 1900.075 cm -1. Signal and noise dependence on gas pressure were studied to optimize sensor performance. The NO concentration resulting in a noise-equivalent signal was found to be 15 parts per billion by volume, with 100 mW optical excitation power and a data acquisition time of 5 s.
NO trace gas sensor based on quartz-enhanced photoacoustic spectroscopy and external cavity quantum cascade laser / Spagnolo, Vincenzo Luigi; Kosterev, A. A.; Dong, L.; Lewicki, R.; Tittel, F. K.. - In: APPLIED PHYSICS. B, LASERS AND OPTICS. - ISSN 0946-2171. - 100:1(2010), pp. 125-130. [10.1007/s00340-010-3984-z]
NO trace gas sensor based on quartz-enhanced photoacoustic spectroscopy and external cavity quantum cascade laser
SPAGNOLO, Vincenzo Luigi;
2010-01-01
Abstract
A gas sensor based on quartz-enhanced photoa-coustic detection and an external cavity quantum cascade laser was realized and characterized for trace nitric oxide monitoring using the NO R(6.5) absorption doublet at 1900.075 cm -1. Signal and noise dependence on gas pressure were studied to optimize sensor performance. The NO concentration resulting in a noise-equivalent signal was found to be 15 parts per billion by volume, with 100 mW optical excitation power and a data acquisition time of 5 s.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
