+c-face incident pentagon mutually pumped phase conjugator

The mutually pumped phase conjugator with +c-face incident geometry is first demonstrated in a photorefractive pentagon-shaped 0°-cut BaTiO ₃ crystal. Designed by choosing the appropriate geometry such as the orientation between two mutual incoherent beams and the special cut crystal's c-axis, a novel configuration can be formed in the crystal when the mutually pumped phase conjugation is established. This configuration provides more efficient interaction, which provides fast response and high stability as well as large angular acceptance and high image resolution.