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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 6 — Mar. 15, 2013
  • pp: 1004–1006

Photorefractive holographic moiré-like patterns for secure numerical code generation

G. N. de Oliveira, M. E. Oliveira, and P. A. M. dos Santos  »View Author Affiliations


Optics Letters, Vol. 38, Issue 6, pp. 1004-1006 (2013)
http://dx.doi.org/10.1364/OL.38.001004


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Abstract

In this Letter, low-frequency photorefractive holographic moiré fringe patterns are proposed as secure numerical code generators that could be useful for storage or data transmission. These dynamic moiré patterns are holographically obtained by the superposition of two or more sinusoidal gratings with slightly different pitches. The Bi12TiO20 photorefractive crystal sample is used as holographic medium. An optical numerical base was defined with patterns representing the 0, 1 and −1 digits as bits. Then, the complete set of these optical bits is combined to form bytes, where a numerical sequence is represented. The results show that the proposed numerical code is simple, robust and extremely secure, then could be used efficiently as standard numerical identification in robotic vision or eventually in storage or transmission of secure numerical data.

© 2013 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(210.0210) Optical data storage : Optical data storage

ToC Category:
Holography

History
Original Manuscript: January 9, 2013
Revised Manuscript: February 18, 2013
Manuscript Accepted: February 19, 2013
Published: March 15, 2013

Citation
G. N. de Oliveira, M. E. Oliveira, and P. A. M. dos Santos, "Photorefractive holographic moiré-like patterns for secure numerical code generation," Opt. Lett. 38, 1004-1006 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-6-1004

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