高密度盘式全息存储及其热固定的实验研究  

Experimental Study on High-Density Holographic Disk Storage with Batch Thermal Fixing

作　　者：万玉红[1] 陶世荃 袁韦华 江竹青[1] 丁晓红[1] 刘国庆[1] 王大勇[1] 

机构地区：[1]北京工业大学应用数理学院,北京100022

出　　处：《中国激光》2005年第3期361-364,共4页Chinese Journal of Lasers

基　　金：国家973计划(G19990330);国家自然科学基金(69977005)资助项目.

摘　　要：利用空间角度复用方式与球面参考波相结合的全息复用存储技术,在盘状LiNbO3∶Fe晶体单一扇形区域内成功存储10000幅高分辨率图像,存储面密度达33 7 bits/μm2.在此基础上,将分批热固定的方法应用于盘式体全息存储,分4批次存储了5000幅高分辨率图像,从而将存储面密度进一步提高到50 bits/μm2.会聚的球面参考波及优化的光路配置减小了参考光的反射光斑尺寸,同时也减少了有害的杂散光从晶体表面反射进入成像光路,保证存储图像能得到良好的再现.Ten thousand images have been successfully stored in a single section of a disk-shaped, iron-doped LiNbO3 crystal using spatio-angular multiplexing with a convergent spherical reference beam, resulting in an areal density of 33.7 bits/μm2. On this basis, the batch thermal fixing technique was applied to holographic disk storage. 5000 high-resolution images, divided in four batches, have been stored and fixed in the same crystal again but within a smaller area, resulting in a higher areal density of 50 bits/μm2. The application of convergent spherical reference beam and optimized optical set-up eliminated the detrimental scattering (from the crystal surface) and prevented it from entering the image detector. The images were reconstructed with good fidelity.

关 键 词：全息 盘式全息存储 分批热固定 光折变晶体 

分 类 号：TB877[一般工业技术—摄影技术]