基于化学计量比Mg:Fe:LiNbO_3的全息存储系统

Digital Volume Holographic Data Storage System Based on Stoichiometric Mg:Fe:LiNbO_3 Crystal

以K_2O为助熔剂,采用顶部籽晶熔融法成功地生长出近化学计量比Mg∶Fe∶LiNbO_3(Mg∶Fe∶SLN)晶体。测量了晶体的紫外吸收光谱及响应时间,且和同成分Fe∶LiNbO_3(Fe∶CLN)晶体作了比较。结果表明,Mg∶Fe∶SLN晶体更适于作为全息存储器来应用。针对全息存储中固有的高原生误码率问题,采用快速响应矩阵码(QR)编码技术对原始数据进行编码,缓解了对系统设计和部件质量等方面的压力。以Mg∶Fe∶SLN晶体作为存储介质,构建了体全息存储系统,将QR码编、译码技术用于包含音频和视频的多媒体数据的全息存储,重构数据能成功回放。

The near stoichiometric Mg ： Fe ： LiNbO3 （Mg ： Fe = SLN） crystal has been prepared by using the top seed solution method with K2 O as fluxing medium. The ultraviolet absorption spectrum and response time of Mg = Fe ： SLN has been tested and compared with the congruent Fe ： LiNbOa＇s （Fe ： CLN） crystal. The results indicated that Mg = Fe ： SLN is much more suitable for holographic storage medium than Fe ： CLN. Against the high inherent primary error code rate in the holographic storage,QR （Quick Response Code） coding technique was employed to encode the raw data, thus the pressure of system design and component quality and other aspects have been relieved. The volume holographic data storage system has been constructed by using Mg ： Fe = SLN crystal as the storage medium. The reconfigureable data can be successfully replayed by applying the QR encoding and decoding technique to the multimedia data holographic storage including video and audio information.