| 近化学计量比Ce∶Mn∶LiNbO3晶体光折变性能研究 |
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| 引用本文： | 杨春晖,许艳波,王锐,徐玉恒.近化学计量比Ce∶Mn∶LiNbO3晶体光折变性能研究[J].光子学报,2007,36(5):909-911. |
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| 作者姓名： | 杨春晖 许艳波 王锐 徐玉恒 |
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| 作者单位： | 哈尔滨工业大学,应用化学系,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金
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黑龙江省科技攻关项目 |
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| 摘 要： | 在LiNbO3中掺进0.015mass%MnCO3和 0.1mass%CeO2,以Czchralski法生长Li/Nb比为1.38的近化学计量比Ce∶Mn∶LiNbO3(Ce∶Mn∶SLN)晶体和Li/Nb比为0.946的同成分Ce∶Mn∶LiNbO3(Ce∶Mn∶CLN)晶体.测试了晶体的红外光谱和紫外可见吸收光谱,讨论了Ce∶Mn∶SLN晶体OH－吸收峰和吸收边移动机理.利用二波耦合光路测试了晶体的指数增益系数,Ce∶Mn∶SLN晶体指数增益系数Γ达到27 cm2－.同时,研究了Ce∶Mn∶SLN指数增益系数提高的机理.
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| 关 键 词： | Ce：Mn：LiNbO3晶体 晶体生长 指数增益系数 |
| 文章编号： | 1004-4213（2007）05-0909-3 |
| 收稿时间： | 2005-01-25 |
| 修稿时间： | 2005-01-25 |
Research on Photorefractive Properties of Near Stiometric Ce: Mn - LiNbO3 Crystals |
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| YANG Chun-hui,XU Yan-bo,WANG Rui,XU Yu-heng.Research on Photorefractive Properties of Near Stiometric Ce: Mn - LiNbO3 Crystals[J].Acta Photonica Sinica,2007,36(5):909-911. |
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| Authors: | YANG Chun-hui XU Yan-bo WANG Rui XU Yu-heng |
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| Institution: | Harbin Institute of Technology,Department of Implied Chemistry,Harbin 150001,China |
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| Abstract: | CeO2(0.1 wt%):MnCO3(0.1 wt%):LN crystals with different Li/Nb ratios( 1.38, 0.946) were grown by Czochralski method.The crystals are near stoichiometric LiNbO3(SLN)crystals when the Li/Nb ratio is 1.38, while it is congruent LiNbO3(CLN) crystals when the Li/Nb ratio is 0.946. The IR spectra and the UV-absorption spectra were tested.The mechanism of the movement of the OH－ vibration peak and the absorption edge were discussed. The exponential gain coefficient of Ce∶Mn∶LN crystals were measured with two-beam coupling, which of Ce∶Mn∶SLN crystals reach to 27 cm－2, and the mechanisms of the improvement of the exponential gain coefficient were studied. |
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| Keywords: | Ce：Mn：LiNbO3 crystals Crystal growth The exponential gain coefficient |
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