Acoustic amplifier for detection of atmospheric pollutants
- 1 December 1973
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 23 (11) , 633-635
- https://doi.org/10.1063/1.1654774
Abstract
Kreuzer has demonstrated the feasibility of detecting atmospheric pollutants using acoustic signals produced by volumetric absorption of infrared radiation. We have investigated a substantial improvement of this technique wherein the optical excitation beam is modulated at a frequency corresponding to a natural acoustic resonance of the sample chamber. Acoustic amplification factors exceeding 100 have been observed.Keywords
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