This paper describes a new technique to mitigate the effect of beam steering on CARS measurements in turbulent, variable density environments. The new approach combines Planar BOXCARS phase-matching with elliptical shaping of one of the beams to generate a signal insensitive to beam steering, while keeping the same spatial resolution. Numerical and experimental results are provided to demonstrate the effectiveness of this approach. One set of experiments investigated the effect of beam shaping in the presence of a controlled and well quantified displacement of the beams at the focal plane. Another set of experiments, more qualitative, proved the effectiveness of the technique in the presence of severe beam steering due to turbulence.
Beam Shaping for CARS Measurements in Turbulent Environments
48th AIAA Aerospace Sciences Meeting ; 2010 ; Orlando, FL, United States
2010-01-04
Conference paper
No indication
English
BEAM SHAPING FOR CARS MEASUREMENTS IN TURBULENT ENVIRONMENTS
British Library Conference Proceedings | 2010
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