A quantitative analysis of the steady-state photorefractive index perturbations caused by a given optical irradiance distribution in a periodically poled ferroelectric is presented. Axially invariant index perturbations that are due to the photogalvanic effect are reduced compared with those in a homogeneously poled crystal by approximately the square of the product of the poling-grating wave vector (Kg) and a characteristic transverse dimension of the irradiance. This result is consistent with empirical observations in periodically poled LiNbO3 of much higher resistance to photorefractive damage.
© 1996 Optical Society of America
Original Manuscript: January 2, 1996
Published: June 15, 1996
Minoru Taya, Matthew C. Bashaw, and M. M. Fejer, "Photorefractive effects in periodically poled ferroelectrics," Opt. Lett. 21, 857-859 (1996)