ABSTRACT
A self-aligned photorefractive autocorrelator is implemented for the real-time use of second-order statistics for texture analysis. We demonstrate the measurement of the length scale of the granularity of a rough surface.
ABSTRACT
We solve the undepleted-pumps photorefractive four-wave mixing equations for the case of orthogonally polarized pump beams. Advantages over the parallel-polarized-pumps case include the potential for reflectivity enhancement and easy isolation of the conjugator from the source. The phase-conjugate reflectivities for both the parallel and orthogonally polarized pump beam cases were measured with a BaTiO3 crystal, and the results support our theoretical predictions.
ABSTRACT
Two-beam coupling in photorefractive BaTiO(3) is used to perform time differentiation of time-varying coherent phase and amplitude images. Differentiation of one-dimensional signals and two-dimensional images is performed.
