Acoustic amplifier for detection of atmospheric pollutants
作者:
C. F. Dewey,
R. D. Kamm,
C. E. Hackett,
期刊:
Applied Physics Letters
(AIP Available online 1973)
卷期:
Volume 23,
issue 11
页码: 633-635
ISSN:0003-6951
年代: 1973
DOI:10.1063/1.1654774
出版商: AIP
数据来源: AIP
摘要:
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.
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