Abstract
A series of Zn:Ru:Fe:LiNbO3 crystals has been grown by Czochralski method. Their infrared transmittance spectra and UV–vis absorption spectra were measured and discussed to investigate their defect structure. The nonvolatile holographic recording of Zn:Ru:Fe:LiNbO3 crystals was characterized by the two-photon fixed method. We found that the recording time of Zn:Ru:Fe:LiNbO3 crystals became shorter and nonvolatile diffraction efficiency increases with the increase of Zn doping concentration, especially doping with Zn approaches the so-called threshold. And the nonvolatility is best when the concentration of ZnO up to 5mol%. The intrinsic and extrinsic defects were discussed to explain the nonvolatile holographic properties in the crystals.
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