Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1539460 | Optics Communications | 2009 | 4 Pages |
Abstract
The near-stoichiometric LiNbO3 crystal co-doped with In2O3, Fe2O3, and CuO has been grown from a Li-rich melt (Li/Nb = 1.38, atomic ratio) by the Czochralski method in air atmosphere for the first time. The OHâ absorption spectra were characterized to investigate the structure defects of the crystals. The appearance of the 3506 cmâ1 absorption peak manifests that the composition of the grown crystal is close to the stoichiometric ratio. The photorefractive properties were also measured by the two-wave coupling experiments. The results show that the near-stoichiometric In:Fe:Cu:LiNbO3 crystal has a larger refractive index change, higher recording sensitivity and larger two-wave coupling gain coefficient than those obtained in the congruent In:Fe:Cu:LiNbO3 crystal under the same experimental conditions. The material of near-stoichiometric In:Fe:Cu:LiNbO3 crystal is a promising candidate for blue photorefractive holographic recording.
Keywords
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Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Xiudong Sun, Suhua Luo, Hongxin Shi, Qingxin Meng, Yongyuan Jiang,