正交相位编码的同轴全息加密存储系统的研究  

Study on Collinear Holographic Storage System with Orthogonal Phase Encryption

作　　者：宋海洋 李枷楠 范琳琳 林达奎 王琨 林枭 谭小地 Song Haiyang;Li Jianan;Fan Linlin;Lin Dakui;Wang Kun;Lin Xiao;Tan Xiaodi(Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education,College of Photonic and Electronic Engineering,Fujian Normal University,Fuzhou 350117,Fujian,China;Fujian Provincial Key Laboratory of Photonics Technology,College of Photonic and Electronic Engineering,Fujian Normal University,Fuzhou 350117,Fujian,China)

机构地区：[1]福建师范大学光电与信息工程学院医学光电科学与技术教育部重点实验室,福建福州350117 [2]福建师范大学光电与信息工程学院福建省光子技术重点实验室,福建福州350117

出　　处：《中国激光》2023年第18期219-226,共8页Chinese Journal of Lasers

基　　金：国家重点研发计划(2018YFA0701800);国家自然科学基金(62105065,U22A2080);福建省科技重大专项(2020HZ01012)。

摘　　要：通过调制具有不同编码单元的参考光,对信息光进行分页式加密存储。提出两种参考光编码加密模式,即扇形参考光编码模式和随机位置参考光编码模式,并对这两种方法进行验证。实验结果表明,这两种方式都通过正交相位编码完成加密解密的过程。对两种方法的加密性进行评估,不同密钥对应的加密信息之间的相似度均值分别为0.57和0.02,均方误差的平均值分别为537和1872。随机位置参考光编码模式下的同轴系统安全性更高。正交相位加密技术可以有效地防止存储数据被非法访问和窃取,保证了数据的安全性。Objective Holographic data storage(HDS)has the characteristics of large storage capacity and fast data transmission rate,which makes it a sustainable development technology in the era of big data.Phase-coded holographic data storage systems have attracted great attention because of such advantages as the high efficiency of light energy,stable structure,and easy modulation by a phase spatial light modulator(SLM).An orthogonal-phase cryptographic collinear holographic storage system is a new optical encryption technique that uses the optical interference principle of laser beams to write and read data and orthogonal phase encryption to ensure data security.Currently,orthogonal phase encryption techniques are often used in off-axis holography.Off-axis holographic storage systems are less resistant to environmental interference,whereby the jitter of the system causes the positions of the phase-key pixels used for encryption and decryption to fail to match properly,leading to information leakage.Therefore,in this study,we attempt to apply and explore the possibility of using orthogonal phase encryption with collinear holographic storage systems.Orthogonal phase encryption can protect the stored data from illegal access and theft to ensure data security.This is critical for maintaining the confidentiality of sensitive information involving personal privacy,trade secrets,and similar information.Methods Based on Kogelnik’s coupled wave theory,the propagation of phase during the formation and reproduction of holograms is accurately described by analyzing the propagation process of light.The recording key and the reading key are in an orthogonal state,that is,the number of units with phase difference of 0 is equal to the number of units with phase difference ofπ,so that the reconstruction intensity of the two parts of the signal light is cancelled through the phase orthogonality.In the system investigated in this study,the collinear system stores the signal light in the pagination encryption by modulating the reference

关 键 词：全息 全息数据存储 同轴系统 正交相位 加密 

分 类 号：O436[机械工程—光学工程]