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.
|Autori interni:||SPAGNOLO, Vincenzo Luigi|
|Titolo:||NO trace gas sensor based on quartz-enhanced photoacoustic spectroscopy and external cavity quantum cascade laser|
|Rivista:||APPLIED PHYSICS. B, LASERS AND OPTICS|
|Data di pubblicazione:||2010|
|Digital Object Identifier (DOI):||10.1007/s00340-010-3984-z|
|Appare nelle tipologie:||1.1 Articolo in rivista|