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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 16 — Aug. 3, 2009
  • pp: 14132–14142

Recording and reading temperature tolerance in holographic data storage, in relation to the anisotropic thermal expansion of a photopolymer medium

Tomiji Tanaka  »View Author Affiliations


Optics Express, Vol. 17, Issue 16, pp. 14132-14142 (2009)
http://dx.doi.org/10.1364/OE.17.014132


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Abstract

In holographic data storage, it is difficult to retrieve data if the temperature difference between recording and reading exceeds 2 K. To widen this tolerance, a compensation method—adjusting the wavelengths and incident directions of the recording and reading beams—has been proposed. In this paper, for the first time, a method for calculating the recording and reading temperature tolerance using this compensation is introduced. To widen the narrow tolerance, typically ± 10 K, it is effective to increase the coefficient of thermal expansion (CTE) of the substrate or decrease the CTE of the photopolymer. Although reducing the Numerical aperture of the objective lens is also effective, it degrades the recording density.

© 2009 OSA

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(090.7330) Holography : Volume gratings
(210.2860) Optical data storage : Holographic and volume memories
(210.4590) Optical data storage : Optical disks

ToC Category:
Optical Data Storage

History
Original Manuscript: April 10, 2009
Revised Manuscript: June 21, 2009
Manuscript Accepted: July 14, 2009
Published: August 3, 2009

Citation
Tomiji Tanaka, "Recording and reading temperature tolerance in holographic data storage, in relation to the anisotropic thermal expansion of a photopolymer medium," Opt. Express 17, 14132-14142 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-16-14132


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References

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