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大数据时代的光存储技术

红外与激光工程 2016年第9期45卷 19-22页

作者：谭小地北京理工大学北京100081

概述了光存储技术的发展历史和现状,分析了在大数据时代光盘的作用和存在的意义。面对传统光盘容量低、速度慢等问题,介绍了能够妥善解决此问题的光盘库技术。最后介绍了可替代传统光盘的全息光存储技术。其中,同轴全息光存储既可与传... 详细信息

概述了光存储技术的发展历史和现状,分析了在大数据时代光盘的作用和存在的意义。面对传统光盘容量低、速度慢等问题,介绍了能够妥善解决此问题的光盘库技术。最后介绍了可替代传统光盘的全息光存储技术。其中,同轴全息光存储既可与传统光盘相兼容,又可作为大数据高密度高速率长期保存的解决方案。

关键词：光学数据存储光存储大数据归档存储数据寿命

High density holographic versatile disc (HVD) system using collinear technologies

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红外与激光工程 2016年第9期45卷 48-53页

作者： Hideyoshi Horimai Lin Xiao Liu Jinpeng tan xiaodi HolyMine Corporation Shizuoka 410-0022 Japan Toyohashi University of Technology Toyohashi 441-8580 Japan Beijing Institute of Technology Beijing 100081 China

Collinear Holography was proposed by OPTWARE Corporation, in which the information and reference beams were aligned co-axially and modulated by the same SLM. With this unique configuration the optical pickup can be designed as small as the DVD ′ s, and can be placed on one side of the recording disc. A 2-dimensional digital page data format was used and the shift-multiplexing method was employed to increased recording density of HVD. As the servo technology is being introduced to control the objective lens to be maintained precisely to the disc in the recording and the reconstructing process, a vibration isolator is no longer necessary. In HVD, the pre-formatted meta-data reflective layer was used for the focus/tracking servo and reading address information, and the dichroic mirror layer was used for detecting holographic recording information without interfering with the preformatted *** and theoretical studies suggest that the holographic material is very effective to increased recording density of the system. HVD will be compatible with existing disc storage systems, like CD and DVD, and enable us to expand its applications into other optical information storage systems.

关键词：激光雷达成像仿真空间目标在轨

Orthogonal matrix of polarization combinations:concept and application to multichannel holographic recording

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Opto-Electronic Advances 2024年第10期7卷 4-13页

作者： Shujun Zheng Jiaren tan Hongjie Liu Xiao Lin Yusuke Saita Takanori Nomura xiaodi tan Information Photonics Research Center College of Photonic and Electronic EngineeringFujian Normal UniversityFuzhou 350117China Department of Electrical and Computer Engineering Duke UniversityDurhamNC 27708USA College of Photonic and Electronic Engineering Key Laboratory of Opto-Electronic Science and for Medicine of Ministry of EducationFujian Provincial Key Laboratory of Photonics TechnologyFujian Provincial Engineering Technology Research Center of Photoelectric Sensing ApplicationFujian Normal UniversityFuzhou 350117China Faculty of Systems Engineering Wakayama University930 SakaedaniWakayama640-8510Japan.

Orthogonal matrices have become a vital means for coding and signal processing owing to their unique distributional *** orthogonal matrices based on amplitude or phase combinations have been extensively explored,the orthogonal matrix of polarization combinations(OMPC)is a novel,relatively unexplored ***,we propose a method for constructing OMPCs of any dimension encompassing 4n(where n is 1,2,4,8,…)mutually orthogonal 2ncomponent polarization *** the field of holography,the integration of polarization multiplexing techniques with polarization-sensitive materials is expected to emerge as a groundbreaking approach for multichannel hologram multiplexing,offering considerable enhancements in data storage capacity and security.A multidimensional OMPC enables the realization of multichannel multiplexing and dynamical modulation of information in polarization holographic *** consolidating all information into a single position within the material,we effectively avoided extraneous crosstalk during the reconstruction *** results show that achieving four distinct holographic images individually and simultaneously depends on the polarization combination represented by the incident *** discovery opens up a new avenue for achieving highly holographic information storage and dynamically displayed information,harnessing the potential of OMPC to expand the heretofore limited dimensionality of orthogonal polarization.

关键词： orthogonal matrix of polarization combinations polarization-modulated multiplexing multichannel recording polarization holography dynamical information modulation

Edge detection of potential field data based on image processing methods

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Global Geology 2018年第2期21卷 134-142页

作者： tan xiaodi ZHANG Dailei MA Guoqing College of Geo-Exploration Science and Technology Jilin University

The conventional methods of edge detection can roughly delineate edge position of geological bodies,but there are still some problems such as low detection accuracy and being susceptible to noise *** this paper,three image processing methods,Canny,Lo G and Sobel operators are briefly introduced,and applied to edge detection to determine the edge of geological ***,model data is built to analyze the edge detection ability of this image processing methods,and compare with conventional *** with gravity anomaly of Sichuan basin and magnetic anomaly of Zhurihe area,the detection effect of image processing methods is further verified in real *** results show that image processing methods can be applied to effectively identify the edge of geological ***,when both positive and negative anomalies exist and noise is abundant,fake edge can be avoided and edge division is clearer,and satisfactory results of edge detection are obtained.

关键词： edge detection image processing Canny operator LoG operator Sobel operator

High density collinear holographic data storage system

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Frontiers of Optoelectronics 2014年第4期7卷 443-449页

作者： xiaodi tan Xiao LIN An'an WU Jingliang ZANG School of Optoelectronics Beijing Institute of Technology Beijing 100081 China

Holographic data storage system （HDSS） has been a good candidate for a volumetric recording technology, due to their large storage capacities and high transfer rates, and have been researched for tens of years after the principle of holography was first proposed. However, these systems, called conventional 2-axis holography, still have essential issues for commercialization of products. Collinear HDSS, in which the information and reference beams are modulated co-axially by the same spatial light modulator （SLM）, as a new read/write method for HDSS are very promising. With this unique configuration, the optical pickup can be designed as small as DVDs, and can be placed on one side of the recording media （disc）. In the disc structure, the preformatted reflective layer is used for the focus/tracking servo and reading address information, and a dichroic mirror layer is used for detecting holographic recording information without interfering with the preformatted information. A 2-dimensional digital page data format is used and the shift-multiplexing method is employed to increase recording density. As servo technologies are being introduced to control the objective lens to be maintained precisely to the disc in the recording and reconstructing process, a vibration isolator is no longer necessary. Collinear holography can produce a small, practical HDSS more easily than conventional 2-axis holography. In this paper, we introduced the principle of the collinear holography and its media structure of disc. Some results of experimental and theoretical studies suggest that it is a very effective method. We also discussed some methods to increase the recording density and data transfer rates of collinear holography.

关键词： holographic data storage system (HDSS),holography optical memory volumetric recording optical disc high density recording

Collinear holographic data storage technologies

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Opto-Electronic Advances 2020年第3期3卷 25-32页

作者： Xiao Lin Jinpeng Liu Jianying Hao Kun Wang Yuanying Zhang Hui Li Hideyoshi Horimai xiaodi tan College of Photonic and Electronic Engineering Fujian Normal UniversityFuzhou 350117China School of Optics and Photonics Beijing Institute of TechnologyBeijing 100081China HolyMine Corporation 2032-2-301 OokaNumazuShizuoka 410-0022Japan

In the era of information explosion,the demand of data storage is increased *** 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 *** holographic data storage technology is the typical solution of the holographic data storage technology which owns a more compact,compatible and practical *** 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.

关键词： holographic data storage collinear holography high density phase modulation

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同轴式光全息存储技术及其系统

光学学报 2006年第6期26卷 827-830页

作者：谭小地堀米秀嘉光技术企业公司

同轴式光全息存储技术是新型超大容量超高速存取的光学存储技术。具有反射式结构的光盘可以将再现光反射回聚焦透镜,因而可以简化系统结构,而且可与现有的光盘系统(如CD和DVD)很好地兼容。引进现有光盘的伺服控制技术可以有效地保持聚... 详细信息

同轴式光全息存储技术是新型超大容量超高速存取的光学存储技术。具有反射式结构的光盘可以将再现光反射回聚焦透镜,因而可以简化系统结构,而且可与现有的光盘系统(如CD和DVD)很好地兼容。引进现有光盘的伺服控制技术可以有效地保持聚焦透镜与光盘间距和精确定位,因而,可将全息图准确无误地记录在媒体中并准确无误地再生出来而不受外界的振动影响。首先讨论了传统的“双光束干涉法”在商品化方面遇到的难题,从而引出了同轴式光全息存储技术并演示了它的记录、再生的实验结果。通过实验数据分析计算了该光盘系统的角度偏差和光源波长容限范围。为实现装置的低成本和小型化等方面提供了理论依据。

关键词：全息光全息存储器光盘系统容限

Linear polarization holography

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Opto-Electronic Science 2022年第2期1卷 10-29页

作者： Jinyu Wang xiaodi tan Peiliang Qi Chenhao Wu Lu Huang Xianmiao Xu Zhiyun Huang Lili Zhu Yuanying Zhang Xiao Lin Jinliang Zang Kazuo Kuroda College of Photonic and Electronic Engineering Fujian Normal UniversityFuzhou 350108China Fujian Provincial Key Laboratory of Photonics Technology Fujian Normal UniversityFuzhou 350108China Key Laboratory of Opto-Electronic Science and Technology for Medicine of Ministry of Education Fujian Normal UniversityFuzhou 350108China Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application Fujian Normal UniversityFuzhou 350108China National Institute of Metrology Chaoyang DistrictBeijing 100029China Institute of Industrial Science The University of TokyoMeguro-kuTokyo 153-8505Japan

Polarization holography is a newly researched field,that has gained traction with the development of tensor *** primarily focuses on the interaction between polarization waves and photosensitive *** extraordinary capabil-ities in modulating the amplitude,phase,and polarization of light have resulted in several new applications,such as holo-graphic storage technology,multichannel polarization multiplexing,vector beams,and optical functional *** this paper,fundamental research on polarization holography with linear polarized wave,a component of the theory of polariz-ation holography,has been ***,the effect of various polarization changes on the linear and nonlinear po-larization characteristics of reconstructed wave under continuous exposure and during holographic recording and recon-struction have been focused *** polarization modulation realized using these polarization characteristics exhibits unusual functionalities,rendering polarization holography as an attractive research topic in many fields of *** paper aims to provide readers with new insights and broaden the application of polarization holography in more sci-entific and technological research fields.

关键词： polarization holography tensor theory polarization modulation linear and nonlinear polarization characteristics

Four-level phase pair encoding and decoding with single interferometric phase retrieval for holographic data storage

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Chinese Optics Letters 2018年第3期16卷 67-70页

作者： Xiao Lin Yong Huang Yang Li Jinyan Liu Jinpeng Liu Ruidan Kang xiaodi tan School of Optics and Photonics Beijing Institute of Technology Beijing 100081 China

We propose four-level phase pair encoding and decoding with single interferometric phase retrieval for holographic data storage. Inherent with phase pair encoding, phase shifting is generated by assigning a certain phase difference between two pixels of the phase pair. Multiple phase shifting operations are not required. In addition, a phase-readout reference beam can be a plane beam with an arbitrary phase in our method because phase shifting can be encoded on the phase-only spatial light modulator easily and accurately. Therefore, our method can not only increase the data transfer rate, but also improve the robustness of the holographic data storage system. Although the code rate of our method needs to be sacrificed by half, the code rate is still twice that of amplitude code when four-level phase encoding is used. We demonstrated experimentally that there is only a 1×10^-2 order of bit error rate before error correcting, which is acceptable. We believe our method will further advance the phase-modulated holographic data storage technique.

关键词： Bit error rate Holographic memory Phase modulation Phase retrieval Phase shift Spatial light modulators