An acoustically resonant system for detection of low-level infrared absorption in atmospheric pollutants
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- Paul D. Goldan
- Aeronomy Laboratory, National Oceanic and Atmospheric Adminstration, Boulder, Colorado 80302
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- Kenya Goto
- National Bureau of Standards, Boulder, Colorado 80302
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<jats:p>The use of acoustic detection for the measurement of infrared absorption in gases has been shown to be of value in measuring atmospheric pollutant gases. Further improvements in detection sensitivity may be achieved by the use of an acoustically resonant system and multipass optics wherein the incident laser radiation is reflected many times through the absorption sample. We have demonstrated acoustic Q's exceeding 750 and sensitivity increases of at least 10 using multipass optics. A microphone amplifier pair is described whose noise limitation approaches the thermal noise on the microphone diaphragm.</jats:p>
収録刊行物
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- Journal of Applied Physics
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Journal of Applied Physics 45 (10), 4350-4355, 1974-10-01
AIP Publishing
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詳細情報 詳細情報について
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- CRID
- 1360018294495935104
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- NII論文ID
- 30015884318
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- NII書誌ID
- AA00693547
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- ISSN
- 10897550
- 00218979
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