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Laser Doppler Velocimetry Using the Photoacoustic Effect of $CO_2$ Laser  

최종운 (호남대 공대 정보통신공학과)
유문종 (호남대 공대 광통신공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.53, no.1, 2004 , pp. 36-40 More about this Journal
Abstract
A new laser Doppler velocimeter employing a $CO_2$ laser has been developed by using its photoacoustic effect. A change in the pressure of a discharge, induced by mixing of a returned wave with an originally existing wave inside the cavity, is employed to detect the Doppler frequency shift. We found that a Doppler frequency shift as much as 34 KHz was detected, and also a good linear relationship between the velocity and the Doppler frequency shift was obtained.
Keywords
photoacoustic; Doppler; $CO_2$;
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[ Kirk H.Michaelian ] / Photoacoustic Infrared Spectroscopy
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