We have demonstrated experimentally the simultaneous self-conjugation of extraordinarily and ordinarily polarized light waves (λ=514 nm), with the polarization state preserved, in a Ce:BaTiO<sub>3</sub> crystal. Conjugate o waves originate from coupling between o and e waves by means of a circular photogalvanic effect. The conjugator also takes advantage of the Ce:BaTiO<sub>3</sub> crystal, for which it is easy to generate an extraordinary conjugate beam by photorefractive backscattering. This beam of light is necessary for double phase conjugation.
© 2000 Optical Society of America
(070.5040) Fourier optics and signal processing : Phase conjugation
(190.0190) Nonlinear optics : Nonlinear optics
(190.5040) Nonlinear optics : Phase conjugation
(190.5330) Nonlinear optics : Photorefractive optics
Hong Chang Kung, Hon Fai Yau, Hsiao Yi Lee, Nickolai Kukhtarev, Tzu Chiang Chen, Ching Cherng Sun, Chi Ching Chang, and Yuh Ping Tong, "Double phase conjugation with orthogonally polarized beams in a BaTiO3 crystal," Opt. Lett. 25, 1031-1033 (2000)