Abstract
Abstract The defect structure of LiNbO3 crystals doped with optical-damage-resistant impurities Zn and In was studied by X-ray and neutron diffraction methods. Photoinduced charge transport in these crystals is discussed in the context of the deduced defect models. In LiNbO3:Zn and LiNbO3:In an increase of the photoconductivity σph and the resulting lowering of photorefraction is related to a variation of the intrinsic defect (NbLi and VLi) concentration. In crystals co-doped with iron an increase of σph is due to a change of the lattice site of the Fe3+-electron trap.
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