Abstract

We find strong optical nonlinearities in Sr_xBa_1−xNb₂O₆ (x = 0.61 and x = 0.75) and in BaTiO₃ crystals caused by thermally induced changes of the refractive indices. This gives strong spatial self-phase modulation and self-focusing of Gaussian light beams and light-induced birefringence. The light intensities are of the order of 10²–10³ mW/mm², and the time response of the effect is of the order of milliseconds.

© 1992 Optical Society of America

Image and hologram fixing method with SrXBa₁₋XNb₂O₆ crystals

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