用两种照明方法在LiNbO3:Cu:Ce晶体中实现非挥发全息存储 |
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引用本文: | 刘友文,刘立人,刘德安,周常河,徐良瑛.用两种照明方法在LiNbO3:Cu:Ce晶体中实现非挥发全息存储[J].中国激光,2001,28(12):1099-1102. |
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作者姓名: | 刘友文 刘立人 刘德安 周常河 徐良瑛 |
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作者单位: | 刘友文:中国科学院上海光机所,上海,201800 刘立人:中国科学院上海光机所,上海,201800 刘德安:中国科学院上海光机所,上海,201800 周常河:中国科学院上海光机所,上海,201800 徐良瑛:中国科学院上海硅酸盐研究所,上海,200050
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基金项目: | 国家自然科学基金(No.69837020)和中国科学院百人计划资助项目. |
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摘 要: | 报道了用两种照明方法在LiNbO3:Cu:Ce晶体中实现非挥发全息存储,一种是用紫外光敏化和红光同时记录的方法,另一种是用氩离子的458nm蓝光敏化和红光同时记录的方法.结果表明第二种方法可以获得更高的光固定(非挥发)衍射效率和光固定效率,但引起弱光致散射.优化的蓝光光强为700W/m2左右时,获得最大光固定折射率变化为5×10-5.
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关 键 词: | 光折变效应 非挥发全息存储 LiNbO3:Cu:Ce晶体 |
收稿时间: | 2000/10/8 |
Realization of Non-volatile Holographic Storage in LiNbO3:Cu:Ce Crystals with Two Illumination Schemes |
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Abstract: | Realization of non-volatile holographic storage in LiNbO 3∶Cu∶Ce crystals with two illumination schemes is reported in this paper, one is with ultraviolet light for sensitization and red light recording proposed by Buse et al., and the other is with 458 nm blue light from Ar + laser for sensitization and red light recording. It is shown that the fixed (nonvolatile) diffraction efficiency and the fixing efficiency with the second scheme are higher than those with the first scheme, but the second scheme causes weakly light-induced scattering. When the optimal intensity of blue light is around 700 W/m 2, the nonvolatile refractive-index change is up to 5×10 -5. |
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Keywords: | photorefractive effect nonvolatile holographic storage LiNbO 3∶Cu∶Ce crystals |
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