Abstract

An ellipsometric method for measuring second-order cascaded phase shift is experimentally demonstrated in a ${\text{KNbO}}_3$ single crystal. We analyze the polarization state composed of the two orthogonal polarizations of the transmitted fundamental wave, one of which experiences intensity-dependent depletion and phase shift while the other does not. This method does not require a well-defined beam profile or interferometric stability.

© 1998 Optical Society of America

High-order nonlinear phase shift caused by cascaded third-order processes

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