Abstract
When optical radiation is incident on a BaTiO3 crystal, the absorbed radiation heats the crystal which causes changes in the extraordinary index of refraction. This thermally-induced bulk index change occurs in addition to any photorefractive index changes and may be as much as three orders of magnitude larger than photorefractive index changes. The bulk index of refraction changes with time until the crystal temperature reaches equilibrium.
© 1991 Optical Society of America
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