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用于双色全息存储(Fe,Cu):LiNbO3晶体的参量优化计算
引用本文:李熊 江竹青 孙砚宾 孔芳 陶世荃. 用于双色全息存储(Fe,Cu):LiNbO3晶体的参量优化计算[J]. 光学学报, 2007, 27(11): 1955-1959
作者姓名:李熊 江竹青 孙砚宾 孔芳 陶世荃
作者单位:北京工业大学应用数理学院,北京100022
基金项目:国家自然科学基金(60377003)资助课题.
摘    要:在确定Cu在LiNbO3晶体中对应于365nm和633nm的激发系数、复合系数、光伏系数的基础上,采用龙格-库塔(Runge-Kutta)数值方法理论研究了双掺杂(Fe,Cu):LiNbO3晶体的深浅能级的掺杂组分比、氧化-还原状态对双色全息存储的记录灵敏度和动态范围的影响,并探讨了同时取得尽可能大的灵敏度和动态范围的晶体条件。结果表明,为了同时得到较大的记录灵敏度和动态范围,在实际应用中选用浅能级掺杂浓度为5.0×10^25m^-3,深能级掺杂浓度为3×10^24~3×10^25m^-3之间的弱氧化晶体是合适的。

关 键 词:全息术 体全息存储 双色全息记录 光折变(Fe  Cu):LiNbO3晶体 记录灵敏度 动态范围
文章编号:0253-2239(2007)11-1955-5
收稿时间:2007-01-29
修稿时间:2007-01-29

Optimized Parameters for Nonvolatile Holographic Recording in (Fe,Cu)∶LiNbO3Crystals
Li Xiong ,Jiang Zhuqing, Sun Yanbin, Kong Fang ,Tao Shiquan. Optimized Parameters for Nonvolatile Holographic Recording in (Fe,Cu)∶LiNbO3Crystals[J]. Acta Optica Sinica, 2007, 27(11): 1955-1959
Authors:Li Xiong   Jiang Zhuqing   Sun Yanbin   Kong Fang   Tao Shiquan
Affiliation:College of Applied Sciences, Beijing University of Technology, Beijing 100022
Abstract:The photo-excitation coefficient, electron recombination coefficient and bulk photovoltaic coefficient of Cu in LiNbO3 are obtained. The effects of doped composition ratio of the deeper and shallower trap centers, oxidization-reduction state on the recording sensitivity and dynamic range are simulated numerically. The crystal conditions for simultaneously optimizing sensitivity and dynamic range are also investigated. The results show that, it is available to choose doping concentration of shallower trap centers as 5.0×1025 m-3 and doping concentration of deeper trap centers as 3×1024~3×1025 m-3 to achieving the larger sensitivity and dynamic range simultaneously in the practical applications.
Keywords:holography   volume holographic storage   two-center holographic recording   photorefractive crystal (Fe,Cu)LiNbO3   recording sensitivity   dynamic range
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