Abstract
We investigate the absorption and photorefractive properties of Ce:BaTiO 3 (cerium doped barium titanate) crystals. The absorption coefficient, electro-optic gain coefficient, and total effective trap density at wavelength 514.5 nm increase systematically with cerium doping concentration. The absorption and the electro-optic gain coefficients exhibit a dependence on the optical intensity. This indicates that there are at least two active photorefractive species. One of these crystals has the highest beam-coupling gain coefficient reported to date, γ=8.06 cm −1 for ordinarily polarized light. The response time of as-grown Ce:BaTiO 3 with 15 ppm cerium is 220 ms at an intensity of 800 mW/cm 2.
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