We have grown and characterized crystals of BaTiO_3 doped with Rh. These crystals have a
blue-green color that is probably due to charge-transfer optical transitions involving Rh^ 4+ …

We measure and analyze beam-coupling gain and response time in BaTiO_3 crystals
doped with cobalt at levels of 50 and 100 parts in 10^ 6 for various oxidation and reduction …

Variably valent iron impurities have been suggested as the source of photorefractive charge
carriers in BaTiO_3. High-purity BaTiO_3 crystals were grown with transition-metal impurity …

We present the experimental results on the measurement of temporal and steady-state light-
induced absorption change in undoped and rhodium-doped barium titanate (Rh: BaTiO 3) …

We investigate the intensity-dependent absorption coefficient of photorefractive Rh: BaTiO3
from the maximum (633 nm) to the near infra-red end (1.06 μm) of this crystal's sensitivity. A …

Impurity levels, light-induced and thermo-induced charge transfer processes in Rh-doped
and Ce-doped photorefractive BaTiO 3 were studied. The thermal depths and optical …

Temperature dependences of the total effective trap density N eff and the electro-optic
coefficient r 33 in Ce-doped and Rh-doped BaTiO 3 were determined by two-beam coupling …

We report the beam-coupling properties of a cobalt-doped oxygen-reduced n-type barium
titanate crystal in the 0° and 45° crystallographic orientations. Oxygen reduction improved …

Determination of the origin of the centers responsible these boules indica. tes a segregation
coefficient near unity for the photorefractive effect in BaTiO, is complicated by (see Table II) …

The photorefractive properties of a nominally pure single crystal of BaTiO_3 were altered by
treating the crystal at 650° C in oxygen at different partial pressures. Treatment altered the …