Abstract

A newly developed method for the characterization of the optical nonlinearities and dynamics is applied to Kerr liquids. The time-resolved pump-probe system based on the $4f$ nonlinear imaging technique with phase object is used to obtain the diffraction pattern of the nonlinear filter induced in the liquid $\mathrm{C}{\mathrm{S}}_2$ placed in the Fourier plane by a charge-coupled device at various delay times. A theory based on two-beam coupling in perpendicular linear polarizations is used to interpret the measurement results. Good agreement is obtained between theory and experiment, suggesting a new method for simultaneous measurements of both magnitude and sign of the intensity-dependent refractive index as well as the dynamics of the Kerr liquids.

© 2009 Optical Society of America

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