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Rapid reading out system and method of holographic data storage

A technology of data storage and readout system, applied in the field of optical storage, can solve the problems of long waiting time, high readout rate, unreachable, etc., and achieve the effect of high-speed readout

Inactive Publication Date: 2010-01-13
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously this "static readout" cannot achieve a high readout rate due to the long waiting time

Method used

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  • Rapid reading out system and method of holographic data storage
  • Rapid reading out system and method of holographic data storage

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Embodiment approach

[0033] 1) An example of hologram readout using the fast readout system for holographic data storage designed in the present invention. First select the holographic dielectric material 13 as a photorefractive crystal: Zn:Fe:LiNbO with a thickness of 3.0mm 3 The crystal (0.03wt% Fe, 6mol% Zn) is disk-shaped, and the powers of the object light and the reference light are 2mW and 8mW respectively. The precision addressing device 12 selects the URM80ACC electric precision turntable of NEWPORT Company, and its speed is set to 4.5° / s, both acceleration and deceleration are set to 5° / s 2 , the pulse generator 10 adopts the TGP110 type 10MHz pulse generator produced by the U.S. TENMA company, and the cycle of the output pulse is set to 45Hz (in combination with the rotating speed of the turntable 4.5° / s, the interval between two images collected by the high-speed image acquisition equipment can be 0.1 °), the pulse width is set to 11ms. The interval between the holograms recorded in ...

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Abstract

The invention relates to a quick read out system and a method of holographic data storage, belonging to the optical storage technical field. The quick read out method is as follows: firstly, a plurality of holograms are recorded at intervals on a holographic medium; then, the high-speed read out of the holograms is realized by means of the synchronous working among precise addressing equipment, an electro-optical switch and high-speed image collection equipment in the state of high-speed motion of the holographic medium. Because the quick read out system of holographic data storage is designed by the method, and consists of a microdrive positioning controller, a pulse generator, high-speed precise addressing equipment, an electro-optical switch, high-speed image collection equipment, a laser and a necessary optical element, the holographic medium is in a high-speed motion state all the time during continuously reading out a plurality of holograms, thereby realizing continuous high-speed read out of the holograms.

Description

technical field [0001] A fast readout system and method for holographic data storage belong to the technical field of optical storage. Background technique [0002] With the construction of the information highway and the development of computer science and technology, the amount of information to be stored and disseminated is increasing sharply, which puts forward higher and higher requirements for information storage technology. Today's society requires both super-large capacity (or high density) and high data transfer rate for memory performance. Optical volume holographic storage is the clearest development direction to achieve this goal. After decades of research, considerable research results have been achieved in the volume holographic mechanism and ultra-high-density and ultra-large-capacity holographic recording materials. [0003] The parallel page storage mechanism and extremely short addressing time of volume holographic storage make it possible to achieve high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/0065G11B7/135
Inventor 陶世荃江竹青万玉红王大勇李光明
Owner BEIJING UNIV OF TECH
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