Coherent anti-Stokes Raman scattering velocimetry with nearly degenerate pumps

The time evolution of the anti-Stokes signal produced from the non-linear interaction of a short Stokes pulse and two long pump pulses that are nearly degenerate in frequency has been investigated. It is shown that this approach allows us to specify the accuracy of CARS (coherent anti-Stokes Raman s...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2002-04, Vol.74 (4-5), p.445-452
Main Authors: RIBET, I, POT, T, LEFEBVRE, M
Format: Article
Language:English
Subjects:
Coherent scattering
Evolution
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Instrumentation for fluid dynamics
Laminar
Nonlinear optics
Optics
Physics
Pumps
Raman scattering
Spectra
Stimulated raman scattering
cars
Velocimetry
Velocity measurement
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Summary:The time evolution of the anti-Stokes signal produced from the non-linear interaction of a short Stokes pulse and two long pump pulses that are nearly degenerate in frequency has been investigated. It is shown that this approach allows us to specify the accuracy of CARS (coherent anti-Stokes Raman scattering) velocimetry and to extend the range of operation of the method. In addition, an original optical scheme capable of delivering short visible pulses with good spatial and spectral properties is reported. The optical bench has been used for the characterisation of a low-pressure laminar Mach-10 flow.
ISSN:0946-2171
1432-0649
DOI:10.1007/s003400200806