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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 8 — Mar. 10, 2003
  • pp: 1508–1514

Secure optical data storage with random phase key codes by use of a configuration of a joint transform correlator

Takanori Nomura, Shunji Mikan, Yoshiharu Morimoto, and Bahram Javidi  »View Author Affiliations


Applied Optics, Vol. 42, Issue 8, pp. 1508-1514 (2003)
http://dx.doi.org/10.1364/AO.42.001508


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Abstract

A secure optical storage based on a configuration of a joint transform correlator by use of a photorefractive material is presented. A key code designed through the use of an optimized algorithm so that its Fourier transform has a uniform amplitude distribution and a uniformly random phase distribution is introduced. Original two-dimensional data and the key code are placed side-by-side at the input plane. Both of them are stored in a photorefractive material as a joint power spectrum. The retrieval of the original data can be achieved with the same key code. We can record multiple two-dimensional data in the same crystal by angular multiplexing and/or key code multiplexing.

© 2003 Optical Society of America

OCIS Codes
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(070.4560) Fourier optics and signal processing : Data processing by optical means
(210.0210) Optical data storage : Optical data storage
(210.2860) Optical data storage : Holographic and volume memories

History
Original Manuscript: June 12, 2002
Revised Manuscript: October 28, 2002
Published: March 10, 2003

Citation
Takanori Nomura, Shunji Mikan, Yoshiharu Morimoto, and Bahram Javidi, "Secure optical data storage with random phase key codes by use of a configuration of a joint transform correlator," Appl. Opt. 42, 1508-1514 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-8-1508

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