期刊
QUANTUM ELECTRONICS
卷 40, 期 2, 页码 167-172出版社
TURPION LTD
DOI: 10.1070/QE2010v040n02ABEH014147
关键词
photoacoustics; laser spectroscopy; quartz tuning fork; QEPAS
资金
- Russian Foundation for Basic Research [06-02-08055]
- Russian Academy of Sciences
A microphotoacoustic highly selective sensor of ammonia is built. Main attention is paid to the operation mechanism of the acoustic sensor based on a quartz tuning fork. The optimal dimensions and configuration of the acoustic resonator are determined, which made it possible to increase the sensor sensitivity by two-three times compared to the sensitivity of the existing devices. The detector sensitivity for ammonia was 60 ppb (0.05 mg m(-3)) for the measurement time of 10 s and a 25-mW, 1.53-mu m laser beam in the acoustic resonator.
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