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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 22, Iss. 9 — May. 1, 1997
  • pp: 639–641

Modulation coding for pixel-matched holographic data storage

Geoffrey W. Burr, Jonathan Ashley, Hans Coufal, Robert K. Grygier, John A. Hoffnagle, C. Michael Jefferson, and Brian Marcus  »View Author Affiliations


Optics Letters, Vol. 22, Issue 9, pp. 639-641 (1997)
http://dx.doi.org/10.1364/OL.22.000639


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Abstract

We describe a digital holographic storage system for the study of noise sources and the evaluation of modulation and error-correction codes. A precision zoom lens and Fourier transform optics provide pixel-to-pixel matching between any input spatial light modulator and output CCD array over magnifications from 0.8 to 3. Holograms are angle multiplexed in LiNbO3:Fe by use of the 90° geometry, and reconstructions are detected with a 60-frame/s CCD camera. Modulation codes developed on this platform permit image transmission down to signal levels of ~2000 photons per ON camera pixel, at raw bit-error rates (BER’s) of better than 10-5. Using an 8–12–pixel modulation code, we have stored and retrieved 1200 holograms (each with 45,600 user bits) without error, for a raw BER of <2×10-8.

© 1997 Optical Society of America

Citation
Geoffrey W. Burr, Jonathan Ashley, Hans Coufal, Robert K. Grygier, John A. Hoffnagle, C. Michael Jefferson, and Brian Marcus, "Modulation coding for pixel-matched holographic data storage," Opt. Lett. 22, 639-641 (1997)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-22-9-639

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