中国激光, 2003, 30 (8): 713, 网络出版: 2006-06-27
光伏电场对大容量体全息存储的影响与抑制
Suppression and Influence of Photovoltaic DC Field on Volume Hologram
信息光学 大容量体全息存储 光伏效应 光伏电场 光折变晶体 information optics multiplexing volume holographic storage photovoltaic effect photovoltaic DC field photorefractive crystal
摘要
Fe:LiNbO3晶体有很强的光伏效应.通过理论分析和实验验证,在全息存储过程中,光伏效应会在晶体表面产生非均匀的光伏直流电场,它不仅降低了材料的动态范围,并且引起了Bragg失配,使得再现图像失真.消除光伏直流电场的方法是使用电解质溶液短路晶体表面电荷.采用这种方法,在晶体一个公共区域内,可存储1000幅能够清晰再现的全息图像.
Abstract
A nonuniform photovoltaic field is created in Fe:LiNbO 3 during hologram recording exposures. Experimental results and analysis show the degradation of the volume holograms in the presence of the photovoltaic field. A sodium chloride solution is used to short circuit the crystal to improve the stored images quality. 1000 holograms which can be reconstructed with high fidelity have been stored in a common volume of the crystal which was placed in the sodium chloride solution.
刘国栋, 何庆声, 李晓春, 金洪震, 王建岗, 邬敏贤, 金国藩. 光伏电场对大容量体全息存储的影响与抑制[J]. 中国激光, 2003, 30(8): 713. 刘国栋, 何庆声, 李晓春, 金洪震, 王建岗, 邬敏贤, 金国藩. Suppression and Influence of Photovoltaic DC Field on Volume Hologram[J]. Chinese Journal of Lasers, 2003, 30(8): 713.
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