| 光折变多重存储的栅自增强读出特性研究 |
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| 引用本文： | 刘继芳,李家立,李育林,忽满利,张培琨. 光折变多重存储的栅自增强读出特性研究[J]. 光子学报, 1999, 28(3): 209-213 |
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| 作者姓名： | 刘继芳 李家立 李育林 忽满利 张培琨 |
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| 作者单位： | 1. 西安电子科技大学技术物理系,西安,710071
2. 中国科学院西安光学精密机械研究所,西安,710068 |
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| 基金项目： | 国家自然科学基金,陕西自然科学基金 |
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| 摘 要： | 研究了光折变重存储读出时折射率栅自增强特性与记录晶体厚度、记录时的光强比以及写入的折射率栅振幅之间的关系.结果表明记录晶体的厚度大于某一值,才有自增强效应;较小的参物光强比具有较大的自增强效果,能获得较大的读出衍射效率;自增强读出所能达到的最大衍射效率与写入的栅振幅大小无关,而读出时衍射效率增加的速率与写入的栅振幅成反比.
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| 关 键 词： | 多重全息存储 栅自增强读出 衍射效率 |
| 收稿时间： | 1999-01-25 |
| 修稿时间： | 1990-01-25 |
PHOTOREFRACTIVE HOLOGRAM GRATING SELF-ENHANCEMENT DURING READOUT |
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| Liu Jifang,Li Jiali,Li Yulin,Hu Manli,Zhang Peikun. PHOTOREFRACTIVE HOLOGRAM GRATING SELF-ENHANCEMENT DURING READOUT[J]. Acta Photonica Sinica, 1999, 28(3): 209-213 |
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| Authors: | Liu Jifang Li Jiali Li Yulin Hu Manli Zhang Peikun |
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| Affiliation: | 1. Technical Physics Department, Xidian University, Xi’an 710071;2. Xi’an Institute of Optics & Precision Mechanics, Chinese Academy of sciences, Xi’an 710068 |
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| Abstract: | The relationships between the photorefractive index gating self enhancement during readout and the thickness of record crystal,the intensity ratio of reference beam to signal beam,as well as the index amplitude were investigated It is shown that to obtain grating self enhancement during readout,the thichness of record crystal should be larger than a certain value A small writing beam ratio results in large self enhancement and high diffraction efficiency The index grating amplitude recorded affects not the maxim diffraction efficiency but the increase speed of the diffraction efficiency during readout |
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| Keywords: | Multiplexing hologram storage Grating enhancement Diffraction efficiency |
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