Abstract
Measurement of the ultrafast optical nonlinearity of liquids is of interest for both understanding the involved physical processes and for practical applications. By using the recently proposed Z-scan technique, which relies on the beam deformation resulting from the nonlinear interaction between the beam and the material,1 one can easily measure the amplitude and the sign of the nonlinear refractive index of the material. Combining this technique with different pulse durations and its time-resolved version with different polarization configurations, one is able to identify clearly different physical processes that contribute to the observed optical nonlinearity.
© 1993 Optical Society of America
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