Measuring photorefractive trap density without the electro-optic effect.
Two optical beams can couple in a photorefractive crystal without using the electro-optic effect. Beam coupling is due to a spatially modulated absorption caused by the rearrangement of trapped charges. We use these gratings to determine the effective photorefractive trap density for several barium titanate crystals.
Pierce
R M
RM
Department of Physics, University of Southern California, University Park, Los Angeles, California 90089-0484, USA.
Cudney
R S
RS
Bacher
G D
GD
Feinberg
J
J