Trace gases detection by photoacoustic technique based on a lineal chirp excitation scheme

Revista Elektrón

Carlos Carreño Romano¹  German Perez Fogwill¹  Martin G. Gonzalez²  Guillermo D. Santiago² 

[1] FIUBA;GLOMAE-FIUBA;

关键词: Espectroscopía fotoacústica;    gases traza;    chirp;   

DOI  :  

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown