Laser Doppler velocimetry using the photoacoustic effect of RF-excited CO<sub>2</sub> laser

Jong-woon Choi

doi:10.1117/12.650536

22 February 2006 Laser Doppler velocimetry using the photoacoustic effect of RF-excited CO₂ laser

Jong-woon Choi

Proceedings Volume 6101, Laser Beam Control and Applications; 61010F (2006) https://doi.org/10.1117/12.650536
Event: Lasers and Applications in Science and Engineering, 2006, San Jose, California, United States

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.

Citation Download Citation

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); https://doi.org/10.1117/12.650536

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