Defect structure and optical fixing holographic storage of Mg:Mn:Fe:LiNbO3 crystals by Zheng Wei, Gui Qiang, and Xu Yuheng

Crystal Research and Technology

Cryst. Res. Technol. 43, 526 (2008) - Abstract -

Defect structure and optical fixing holographic storage of Mg:Mn:Fe:LiNbO₃ crystals

Zheng Wei, Gui Qiang, and Xu Yuheng*

College of Material Science and Engineering, 317#, Harbin University of Science and Technology, Harbin, 150040, China
*Department of Applied Chemistry, Harbin Institute of Technology, Harbin, 150001, China

Keywords	lithium niobate, defects structure, photorefractive properties
PACS	42.70.Nq, 61.72.-y, 42.65.Hw
DOI	10.1002/crat.200711092

Mg:Mn:Fe:LiNbO₃ crystals were grown by the Czochralski method. The defect structure was analyzed by UV-vis spectra and IR spectra. The holographic storage of Mg:Mn:Fe:LiNbO₃ crystals was measured by the two color fixed method. The results show that with the increase of MgO doping concentration, the writing time becomes shorter, the dynamic range decreases, photorefractive sensitivity increases and fixing diffraction efficiency decreases. When the MgO doping concentration exceeds 4.5 mol%, the fixing diffraction efficiency approaches zero. The effect of doping Mg ions on the holographic storage properties of Mn:Fe:LiNbO₃ crystals is discussed.

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