Growth and properties of a new holographic storage material: Ce:Pr:LiNO3 crystal

Wei Zheng; Liancheng Zhao; Rui Wang; Yuheng Xu

doi:10.1117/12.483294

17 September 2002 Growth and properties of a new holographic storage material: Ce:Pr:LiNO₃ crystal

Wei Zheng, Liancheng Zhao, Rui Wang, Yuheng Xu

Proceedings Volume 4930, Advanced Optical Storage Technology; (2002) https://doi.org/10.1117/12.483294
Event: Photonics Asia, 2002, Shanghai, China

Abstract

Pr:LiNbO₃ crystal can be used in two-color gated storage process for its special energy-level structure. Compared with other crystals used as volume holographic storage media, it has a great merit that an image recording does not erase the recorded one in multiplex storage process. But its photorefractive effect appears weaker than other crystals in the same conditions. We doped photorefractive sensitizing element Ce into Pr:LibNO₃ to get Ce:Pr:LiNbO₃ crystal with Czochralski method. The structure of crystals has been determined by X-ray powder diffraction method. The results indicate Pr:LiNbO₃ and Ce:Pr:LiNbO₃ keep the same structural characteristics as pure lithium niobate. In the absorption spectra of Pr:LiNbO₃ and Ce:Pr:LiNbO₃ samples with non-polarized light in wavelength of 300 - 900 nm, the absorption edge of Ce:Pr:LiNbO₃ shifts to the red compared with that of Pr:LiNbO₃. The diffraction efficiency, writing time and especially erasing time of Ce:Pr:LiNbO₃ have been measured. We find that maximum diffraction efficiency of Ce:Pr:LiNbO₃ has increased without at cost of decreasing the erasing time. The effect of doping ions on the optical properties of Ce:Pr:LiNbO₃ crystal as holographic recording media has been studied systematically.

Citation Download Citation

Wei Zheng, Liancheng Zhao, Rui Wang, and Yuheng Xu "Growth and properties of a new holographic storage material: Ce:Pr:LiNO₃ crystal", Proc. SPIE 4930, Advanced Optical Storage Technology, (17 September 2002); https://doi.org/10.1117/12.483294

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