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
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。
全息 全息数据存储 同轴系统 正交相位 加密 中国激光
2023, 50(18): 1813017
Author Affiliations
Abstract
1 College of Photonic and Electronic Engineering, Key Laboratory of Opto-Electronic Science and for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application, Fujian Normal University, Fuzhou 350117, China
2 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
3 HolyMine Corporation, 2032-2-301 Ooka, Numazu, Shizuoka 410-0022, Japan
To increase the storage capacity in holographic data storage (HDS), the information to be stored is encoded into a complex amplitude. Fast and accurate retrieval of amplitude and phase from the reconstructed beam is necessary during data readout in HDS. In this study, we proposed a complex amplitude demodulation method based on deep learning from a single-shot diffraction intensity image and verified it by a non-interferometric lensless experiment demodulating four-level amplitude and four-level phase. By analyzing the correlation between the diffraction intensity features and the amplitude and phase encoding data pages, the inverse problem was decomposed into two backward operators denoted by two convolutional neural networks (CNNs) to demodulate amplitude and phase respectively. The experimental system is simple, stable, and robust, and it only needs a single diffraction image to realize the direct demodulation of both amplitude and phase. To our investigation, this is the first time in HDS that multilevel complex amplitude demodulation is achieved experimentally from one diffraction intensity image without iterations.
holographic data storage complex amplitude demodulation deep learning computational imaging Opto-Electronic Advances
2023, 6(3): 220157
1 Information Photonics Research Center, College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China
2 Fujian Provincial Key Laboratory of Photonics Technology, Fuzhou 350117, China
3 Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fuzhou 350117, China
4 Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China
Embedded data are used to retrieve phases quicker with high accuracy in phase-modulated holographic data storage (HDS). We propose a method to design an embedded data distribution using iterations to enhance the intensity of the high-frequency signal in the Fourier spectrum. The proposed method increases the antinoise performance and signal-to-noise ratio (SNR) of the Fourier spectrum distribution, realizing a more efficient phase retrieval. Experiments indicate that the bit error rate (BER) of this method can be reduced by a factor of one after 10 iterations.
holographic data storage (HDS) phase retrieval embedded data high frequency Frontiers of Optoelectronics
2021, 14(4): 529–539
Author Affiliations
Abstract
1 College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China
2 School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
3 HolyMine Corporation, 2032-2-301 Ooka, Numazu, Shizuoka 410-0022, Japan
In the era of information explosion, the demand of data storage is increased dramatically. Holographic data storage technology is one of the most promising next-generation data storage technologies due to its high storage density, fast data transfer rate, long data life time and less energy consumption. Collinear holographic data storage technology is the typical solution of the holographic data storage technology which owns a more compact, compatible and practical system. This paper gives a brief review of holographic data storage, introduces collinear holographic data storage technology and discusses phase modulation technology being used in the holographic data storage system to achieve higher storage density and higher data transfer rate.
holographic data storage collinear holography high density phase modulation Opto-Electronic Advances
2020, 3(3): 03190004
1 试验物理与计算数学国家重点实验室, 北京 100076
2 北京航天长征飞行器研究所, 北京 100076
3 北京理工大学光电学院, 北京 100081
以历史为引线, 综述了体全息存储技术的研究历史、现状和未来的发展趋势。列举了体全息存储原理、特点以及国内外体全息存储的发展历程。分别介绍了体全息存储驱动器结构、存储材料、信道处理的关键技术的现状, 并对相位型及偏振型体全息存储的最新进展进行了展望。对阻碍体全息存储实用化的技术问题进行了分析, 认为页间串扰噪声、材料散射噪声、材料收缩是限制存储密度的3个瓶颈问题, 是后续研究需要重点解决的问题。
光数据存储 全息 体全息存储 中国激光
2017, 44(10): 1000001
1 Department of Optical Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan
2 Center for Optical Research and Education, Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan
3 Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
红外与激光工程
2016, 45(9): 935004
Research Laboratory for High Density Optical Storage, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Frontiers of Optoelectronics
2014, 7(4): 450–466
School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China
Frontiers of Optoelectronics
2014, 7(4): 443–449
清华大学 精密仪器系 精密测试技术与仪器国家重点实验室，北京 100084
在1∶1体全息存储系统的读出过程中，保证图像的不失真和降低误码率是最关键的问题。提出了一种新颖的放大率补偿算法，定量分析了放大率偏移误差对图像的影响，并通过理论推导和实验模拟证明了这一算法的可行性。
体全息存储 共轭光 放大率偏移误差 补偿算法 holographic data storage phase-conjugate beam magnification shift error compensation algorism
中国科学院上海光学精密与机械研究所,上海,201800
报导了一种新型的对绿光敏感的光致聚合物材料.该材料以丙烯酰胺为单体,由光引发剂,共引发剂,成膜物等组成.本材料记录的全息图衍射效率可达55%.在光聚物上采用角度复用技术存储了10幅图像,得到的再现像信噪比较高.说明该材料适合于大容量体全息存储.
光致聚合物 衍射效率 全息存储 角度复用
