Cu-diffused layers in LiNbO3 for reversible holographic storage

Some holographic recording characteristics of Cu-diffused layers fabricated in Rh-doped LiNbO₃ have been examined in comparison with those fabricated in undoped lithium niobate.The diffusion layers, whose thickness depends on the diffusion temperature, are found to be enormously susceptible to optically-induced refractive index changes and to be able to attain a high diffraction efficiency. A distinguished difference is found between the persistence of holograms stored in Rh-doped and undoped LiNbO₃.