A method of intensity-dependent polarization switching is proposed. The effect is based on simultaneous action of two phase-matched second-order processes in a quadratic medium. Using analytical and numerical techniques, we demonstrate that a single linearly polarized fundamental wave, when it is propagating in such a medium, can efficiently generate a new fundamental wave of orthogonal polarization. The polarization switching is explained by an effective four-wave-mixing process that is performed through second-order cascading.
© 1999 Optical Society of America
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(200.4740) Optics in computing : Optical processing
(230.5440) Optical devices : Polarization-selective devices
S. Saltiel and Y. Deyanova, "Polarization switching as a result of cascading of two simultaneously phase-matched quadratic processes," Opt. Lett. 24, 1296-1298 (1999)