LIGHT-INDUCED CHARGE-TRANSPORT PROCESSES IN PHOTOREFRACTIVE CRYSTALS .2. MATERIALS

The charge transport processes in different photorefractive oxide crys tals are reviewed and consequences for applications are outlined. - Th e light-induced charge transport processes in LiNbO3, LiTaO3, BaTiO3, Ba1-xSrxTiO3 (0 less than or equal to x less than or equal to 1, BST), Ba1-xCaxTiO3 (0 less than or equal to x less than or equal to 1, BCT) , KNbO3, KTa1-xNbxO3 (0 less than or equal to x less than or equal to 1, KTN), Sr1-xBaxNb2O6 (0 less than or equal to x less than or equal t o 1, SBN) and Bi-12(Si,Ti,Ge)O-20 (BSO, BTO, EGO) are discussed. Utili zing the knowledge on the charge transport processes, consequences for applications are deduced; improved techniques for nondestructive read out of holograms with light of the recording wavelength are described.