Spectroscopic Investigation of Photovoltaic Effects in Doped LiNbO3

Photo‐induced currents and voltages determining the photorefractive effect in transition metal doped crystals have been measured in the spectral region between 1.5 and 4.0 eV. The current density , the constant κ describing the anisotropic charge transfer, the conductivity σ during illumination, and the saturation field have been investigated. The results yield information on the photorefractive centers and on the optical storage properties of mono‐ and double‐doped .