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Applied Optics

Applied Optics


  • Vol. 41, Iss. 32 — Nov. 11, 2002
  • pp: 6809–6814

Nonvolatile holograms in LiNbO3:Fe:Cu by use of the bleaching effect

De’an Liu, Liren Liu, Changhe Zhou, Liyong Ren, and Guangao Li  »View Author Affiliations

Applied Optics, Vol. 41, Issue 32, pp. 6809-6814 (2002)

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We report our observation of a bleaching effect under an ultraviolet exposure in LiNbO3:Fe:Cu crystals. Two three-step recording-transferring-fixing schemes are proposed to record nonvolatile photorefractive holograms in such crystals. In the schemes two red laser beams and an ultraviolet illumination are used selectively to write the charge grating in the shallow-level Fe centers, to develop the charge grating in the deep-level Cu centers by transferring the charge grating in the Fe centers, and to fix only the charge grating in the Cu centers for unerasable read-out. Experimental results, verifications, and an optimal recording scheme are given. A comparison of the lithium niobate crystals of the same double-doping system of Fe:Mn, Ce:Mn, Ce:Cu, and Fe:Cu is outlined.

© 2002 Optical Society of America

OCIS Codes
(050.7330) Diffraction and gratings : Volume gratings
(090.2900) Holography : Optical storage materials
(160.5320) Materials : Photorefractive materials

Original Manuscript: February 4, 2002
Revised Manuscript: July 25, 2002
Published: November 10, 2002

De’an Liu, Liren Liu, Changhe Zhou, Liyong Ren, and Guangao Li, "Nonvolatile holograms in LiNbO3:Fe:Cu by use of the bleaching effect," Appl. Opt. 41, 6809-6814 (2002)

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