Characterization of a photorefractive rhodium doped barium titanate at 1.06 μm

Abstract We characterize Rh:BaTiO 3 by cw two-beam coupling experiments at 1.06 μm. We demonstrate that all our measurements are well described by a single-carrier, single-site model as soon as the incident intensity is large enough. The effective trap density is found to be equal to N eff = 6 × 10 16 cm −3 and the maximum measured gain is 23 cm −1 . At 20 W cm −2 with a measured absorption of 0.15 cm −1 , the time constant is 75 s.

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