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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 35 — Dec. 11, 1999
  • pp: 7288–7293

Encrypted optical storage with angular multiplexing

Osamu Matoba and Bahram Javidi  »View Author Affiliations


Applied Optics, Vol. 38, Issue 35, pp. 7288-7293 (1999)
http://dx.doi.org/10.1364/AO.38.007288


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Abstract

We present the first, to our knowledge, demonstration of an encrypted optical storage based on double-random phase encoding by using angular multiplexing in a photorefractive material. Original two-dimensional data are encrypted by use of two random phase codes located in the input and the Fourier planes and are then stored holographically in a LiNbO3:Fe crystal. The retrieval of the original data can be achieved with a phase-conjugated readout scheme. We demonstrate the encryption and the decryption of multiple frames of two-dimensional digital data by using angular multiplexing. We also evaluate numerically the influence of the bandwidth of the optical system on the decrypted digital data. The bit error rate as a function of the optical system bandwidth is presented.

© 1999 Optical Society of America

OCIS Codes
(070.4560) Fourier optics and signal processing : Data processing by optical means
(190.5330) Nonlinear optics : Photorefractive optics
(210.0210) Optical data storage : Optical data storage
(210.2860) Optical data storage : Holographic and volume memories

History
Original Manuscript: April 22, 1999
Revised Manuscript: August 19, 1999
Published: December 10, 1999

Citation
Osamu Matoba and Bahram Javidi, "Encrypted optical storage with angular multiplexing," Appl. Opt. 38, 7288-7293 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-35-7288


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