可擦重写式全息光盘存储系统与光致变色材料

项目名称： 可擦重写式全息光盘存储系统与光致变色材料

项目编号： No.60867001

项目类型： 地区科学基金项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 门克内木乐

作者单位： 内蒙古大学

项目金额： 22万元

中文摘要： 国际上2006年年底上市的第一代全息光盘产品为一次性记录多次读出的全息光盘（HVD-ROM），但可擦重写的全息存储器件（HVD-RW）还未出现，有关研究是近几年的研究热点。目前还未找到一种各项指标都优良的可擦写全息记录材料，有机光致变色材料最有希望被应用。但因为光致变色材料的高灵敏度，实现非破坏性读出遇到了困难。 本项目以细菌视紫红质与俘精酸酐等有机光致变色材料作为全息光盘记录材料，建立了一套可擦写式全息存储系统。系统中利用相位型光栅的衍射在695nm处进行读出，破坏作用小了很多，但还没能实现完全的非破坏性读出；利用共线技术实现了系统体积的缩小，体积为约10×#215;0.6 dm3 ；利用傅里叶变换技术提高了存储密度，单页数据存储密度达200MB/cm2；利用偏振全息记录技术提高了信噪比，可以实现低误码率。系统上还可以实现自动寻址以及信息的加载，编码，读取和解码等全部过程，但目前只能单独操作，单页数据存取速率可达16KB/s。

中文关键词： 可擦重写式全息光盘存储系统；光致变色材料；菌紫质；俘精酸酐；非破坏性读出

英文摘要： The world's first generation of holographic discs were listed on the end of 2006, but they are all WORM (Write Ones Read Many) product (HVD-ROM). The rewriteable holographic storage equipments (HVD-RW) are still in research, whose commercialization is mainly limited by the properties of holographic recording materials. Organic photochromic materials show great potential in the field of rewriteable holographic storage. But the nondestructive readout turns to be difficult because of their high sensitivity. In this project, a rewriteable holographic storage system was established. In this system the organic photochromic films like bacteriorhodopsin films and fulgide/PMMA films were used as the holographic recording material. And the nondestructive readout experiments were done by reconstructing with 695nm laser, which is depending on the diffraction of phase-type gratings. The results show that the recorded signals were also destroyed when reconstructed by 695nm laser, where the B-state and the M-state have no absorption, and the reason is not so clear, but the damaging effects are significantly less than that at 633nm. Using the collinear holography the volume for storage system turned to be smaller,which was about 10×#215;0.6 dm3 . Using the Fourier transform technique the storage density was improved, which is about 200MB/cm2 for a single-page data storage. Using orthogonal polarization hologram technique the signal noise ratio is improved. In the system, the automatic addressing as well as information load, coding, reading and decoding process can be realized independently, and the data access speed is about 16KB/s for a single-page data storage.

英文关键词： HVD-RW system; photochromic materials; bacteriorhodopsin; fulgide; non-destructive readout