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High density collinear holographic data storage system

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Abstract

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.

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Authors and Affiliations

  1. School of Optoelectronics, Beijing Institute of Technology, Beijing, 100081, China

    Xiaodi Tan, Xiao Lin, An’an Wu & Jingliang Zang

Authors
  1. Xiaodi Tan
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  2. Xiao Lin
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  3. An’an Wu
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  4. Jingliang Zang
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Corresponding author

Correspondence to Xiao Lin.

Additional information

Xiaodi Tan, graduated from the Optical Department of Shandong University in 1984, he obtained a Master’s Degree from the Optical Engineering Department of Beijing Institute of Technology. His Doctoral thesis on “Optical Secure Holographic Storage Systems” was completed at The University of Tokyo, Institute of Industrial Science, in the Laboratory of Kuroda-Shimura in 2001. He was a Senior Engineer of the Technology Division in OPTWARE Corporation, researching and developing the next generation of optical storage systems. And he was a Senior Technology Analyst, Distinguished Engineer and Optical Technology Manager of Core Device Development Group in Sony Corporation. He is currently a professor at the School of Optoelectronics in Beijing Institute of Technology. His research interests are in information optics: holographic storage, optical information display, optical devices, etc.

Xiao Lin, graduated from the School of Information of Shandong University in 2012 and got Bachelor of Engineering Degree. He currently is a successive master-doctoral student at Beijing Institute of Technology. He is a SPIE student member. His research interests are holographic storage and optical information display.

An’an Wu, graduated from the School of Optical-Electrical and Computer Engineering of University of Shanghai for Science and Technology in 2012. Now he is studying for a Master’s Degree in Optical Engineering Department of Beijing Institute of Technology. He is working in the Information Optics Laboratory and his Master’s thesis is “Essential research of the theory of polarization holography”.

Jinliang Zang, graduated from the Physics Engineering Department of Qufu Normal University in 2010, and obtained the Master’s Degree from the Physics Department of the Captical Normal University in 2013. Now, he is Ph.D candidate at Optical Engineering Department of Beijing Institute of Technology. His research interests are in information optics: optical information storage, optical encryption, holographic display, etc.

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Tan, X., Lin, X., Wu, A. et al. High density collinear holographic data storage system. Front. Optoelectron. 7, 443–449 (2014). https://doi.org/10.1007/s12200-014-0399-1

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  • DOI: https://doi.org/10.1007/s12200-014-0399-1

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