Enhanced two-wave mixing in a photorefractive waveguide having a periodically reversed c-axis by electrical poling technique

Propagation angle sensitivity of two-wave mixing is observed in a photorefractive BaTiO3 waveguide having a periodically reversed c-axis. The periodic reversal of the c-axis is realized for the first time by adopting an electrical poling technique in which the polarization of the applied electric field is cyclically reversed along the waveguide axis.