In certain crystals, photorefractive two-beam coupling is predicted for orthogonally polarized optical beams. The prediction follows from the phenomenological tensor form of the photogalvanic current. We demonstrate this coupling by measuring the complex beam-coupling coefficient in barium titanate and show that the photogalvanic current correctly predicts the form for the coefficient as a function of the beam crossing angle.
© 1992 Optical Society of America
Original Manuscript: January 6, 1992
Published: June 1, 1992
R. M. Pierce and R. S. Cudney, "Photorefractive coupling between orthogonally polarized light beams in barium titanate," Opt. Lett. 17, 784-786 (1992)