Abstract

A photorefractive crystal waveguide with periodically reversed c axis (PCW-PX) is proposed for enhanced photorefractive two-wave mixing. In PCW-PXs, only the guided modes which have a particular propagation angle with respect to the waveguide axis are selectively coupled to the other guided modes. The mode-descriminative photorefractive coupling in two-wave mixing is experimentally verified in prepared BaTiO3 PCW-PXs.

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