22 February 2006 Laser Doppler velocimetry using the photoacoustic effect of RF-excited CO2 laser
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Abstract
A new laser Doppler velocimeter employing an RF-excited CO2 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 small as 50 kHz was detected, and also a good linear relationship between the velocity and the Doppler frequency shift was obtained.
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Jong-woon Choi, "Laser Doppler velocimetry using the photoacoustic effect of RF-excited CO2 laser", Proc. SPIE 6101, Laser Beam Control and Applications, 61010F (22 February 2006); doi: 10.1117/12.650536; https://doi.org/10.1117/12.650536
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