We propose what we believe to be a novel and simple method for optical symmetry filtering, using anisotropic self-diffraction in BaTiO3 crystals. This method allows us to distinguish a centrosymmetric pattern from a noncentrosymmetric pattern easily with scale invariance. It is self-referential; no extra reference element is required. Both the theory and the experiment are demonstrated.
© 1999 Optical Society of America
Original Manuscript: September 9, 1998
Revised Manuscript: December 21, 1998
Published: June 10, 1999
Ching-Cherng Sun, Bor Wang, Wei-Chia Su, Arthur E. T. Chiou, and Jenq-Yang Chang, "Optical symmetry filtering by use of anisotropic self-diffraction in BaTiO3 crystals," Appl. Opt. 38, 3720-3725 (1999)