Trace gases detection by photoacoustic technique based on a lineal chirp excitation scheme
DOI:
https://doi.org/10.37537/rev.elektron.2.1.34.2018Keywords:
Photoacoustic spectroscopy, trace gases, chirpAbstract
We present a new photoacoustic gas-trace measurement setup, based on a chirped optical chopper. This method combines features of the resonant and pulsed techniques. To show the advantages of this setup, we carried out a comparison with the resonant method in samples of NO2 contained in a one-dimensional acoustic resonator. The results show the chirped technique allows carrying out short-term acquisitions with good signal-to-noise ratio.Downloads
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