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实验研究了基因改性菌紫质BR_D96N薄膜在不同偏振光记录下的全息存储特性,比较了不同偏振态记录光和读出光对衍射像光强及信噪比的影响.实验结果表明,与其他偏振全息记录相比,正交圆偏振光记录可实现衍射光偏振状态与散射噪声偏振状态的分离,得到高信噪比的衍射像,同时还具有高的衍射效率.以He_Ne激光器(633nm,3mW)为记录和读出光源,用空间光调制器作为数据输入元件,CCD作为数据读出器件,采用傅里叶变换全息记录的方法,在BR_D96N薄膜样品60μm×42μm的面积上进行了正交圆偏振全息数据存储,达到了2×108bit cm2的存储面密度,并实现了编码数据的无误读出与还原.
The holographic storage characteristics of the genetically modified bacteriorhodopsin BR_D96N film under different polarized light recordings were studied experimentally and the effects of different polarized recording and reading lights on the light intensity and the signal-to-noise ratio were compared. The experimental results show that Compared with other polarization holographic recording, the orthogonal circularly polarized light recording can separate the polarization state of the diffracted light from the polarization state of the scattering noise to obtain a diffraction image with high signal-to-noise ratio and high diffraction efficiency. The He_Ne laser (633nm, 3mW) for the recording and reading of light source, the spatial light modulator as a data input component, CCD as a data readout device, using Fourier transform holographic recording method, BR_D96N film samples were orthogonal to the area of ?? 60μm × 42μm Circular polarization holographic data storage, reached 2 × 108bit cm2 of the storage area density, and to achieve the correct reading and restoring of encoded data.