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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 7, Iss. 12 — Dec. 1, 1990
  • pp: 2323–2328

Thermal hologram fixing in pure and doped KNbO3 crystals

G. Montemezzani and P. Günter  »View Author Affiliations


JOSA B, Vol. 7, Issue 12, pp. 2323-2328 (1990)
http://dx.doi.org/10.1364/JOSAB.7.002323


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Abstract

We demonstrate holographic fixing by means of a thermal cycling procedure in pure and doped photorefractive KNbO3 crystals. At elevated temperatures (70–100°C) the photoinduced grating is compensated for by a secondary grating that is formed by charge carriers whose thermal activation energy is ~1.0 eV. The secondary carriers are stable at room temperature and form the fixed grating after cooling the crystal. They are believed to be represented by ions or ion vacancies. By using our fixing mechanisms the holographic storage time in KNbO3 can be increased by a factor of 106.

© 1990 Optical Society of America

History
Original Manuscript: May 15, 1990
Manuscript Accepted: July 9, 1990
Published: December 1, 1990

Citation
G. Montemezzani and P. Günter, "Thermal hologram fixing in pure and doped KNbO3 crystals," J. Opt. Soc. Am. B 7, 2323-2328 (1990)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-7-12-2323

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