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Composition and temperature dependence of the light-induced scattering in Fe-doped lithium niobate

Shi Li-Hong Yan Wen-Bo Shen Xu-Nan Chen Gui-Feng Chen Hong-Jian Qiao Hui-Bin Jia Fang-Fang Lin Ai-Diao

Composition and temperature dependence of the light-induced scattering in Fe-doped lithium niobate

Shi Li-Hong, Yan Wen-Bo, Shen Xu-Nan, Chen Gui-Feng, Chen Hong-Jian, Qiao Hui-Bin, Jia Fang-Fang, Lin Ai-Diao
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  • Received Date:  22 February 2012
  • Accepted Date:  30 April 2012
  • Published Online:  05 December 2012

Composition and temperature dependence of the light-induced scattering in Fe-doped lithium niobate

  • 1. Department of Physics, Tianjin Urban Construction Institute, Tianjin 300384, China;
  • 2. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant No. 61108060), the Excellent Young Researcher Foundation from Hebei University of Technology, China (Grant No. 2011001), and the Key Project of Ministry of Education of China (Grant No. 212016).

Abstract: In this paper, Fe-doped lithium niobate crystals with different Li compositions are prepared. The composition and temperature dependence of the light-induced scattering in Fe-doped lithium niobate are studied. The results show that the crystals with the compositions lower than 49.0 mol% suffer from the serious light-induced scattering, but when the composition increases to 49.3 mol% the light-induced scattering is suppressed significantly, in particular at a composition of 49.8 mol% the light-induced scattering disappears completely. It is also found that the light-induced scattering of the crystals with lower compositions can be suppressed completely by elevating the temperature to 150 ℃. However the temperature for the complete suppression of the light-induced scattering in the crystal with a composition of 49.3 mol% is only 80 ℃. Based on these results, it is suggested that a critical Li composition may exist in a range from 48.9 mol% to 49.3 mol% and beyond this composition the suppression and temperature dependence of the light-induced scattering will change significantly.

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