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Heterodyne coherent anti-Stokes Raman scattering for spectral phase retrieval and signal amplification

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Abstract

We study interference between a local oscillator and coherent anti-Stokes Raman scattering signal fields by controlling their relative phase and amplitude. This control allows direct observation of the real and imaginary components of the third-order nonlinear susceptibility (χ(3)) of the sample. In addition, we demonstrate that the heterodyne method can be used to amplify the signal.

© 2010 Optical Society of America

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