Crystal Research and Technology
Cryst. Res. Technol. 37 (2002) 976 - Abstract -

X. H. Zhen, W. S. Xu**, C. Z. Zhao*, L. C. Zhao, Y. H. Xu**

School of Material Science and Engineering, Harbin Institute of Technology, Harbin, P. R. China
*Department of Physics, Harbin Normal University, Harbin, P. R. China
**Department of Applied Chemistry, Harbin Institute of Technology, Harbin, P. R. China

Structure and Photo-Damage Resistance of Li-Rich LiNbO3 Crystals Co-Doped with Zn2+/ Er3+

The pure congruent LiNbO3, Er:LiNbO3 and Zn,Er co-doped Li-rich LiNbO3 crystals were grown by Czochralski method. The X-ray diffraction method and ultraviolet-visible absorption spectra of the crystals were used to analyze the structure of the crystals. The photo-damage ability resistance of the crystals was measured. The Zn,Er co-doped Li-rich LiNbO3 crystals show a decrease in lattice constant values, a shift in absorption edge of ultraviolet-visible absorption spectra towards shorter wavelength, and three orders of magnitude increase in photo-damage resistance compared to congruent LiNbO3 crystal. The intrinsic and extrinsic defects are discussed to explain the enhance of the photo-damage ability resistance.

Keywords: Zn:Er:LiNbO3 Li-rich crystal, absorption spectrum, photo-damage ability resistance


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