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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 17, Iss. 8 — Aug. 1, 2000
  • pp: 1412–1419

Photorefractive charge compensation in α-phase proton-exchanged LiNbO3 waveguides

A. Méndez, A. García-Cabañes, M. Carrascosa, and J. M. Cabrera  »View Author Affiliations


JOSA B, Vol. 17, Issue 8, pp. 1412-1419 (2000)
http://dx.doi.org/10.1364/JOSAB.17.001412


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Abstract

Photorefractive recording and light and dark erasures have been measured in unannealed α-phase proton-exchanged LiNbO3 waveguides. The saturation index change, Δns≅9×10−6, is independent of the light intensity within the studied range, 0.3–50 W/cm2. The time dependencies are well represented by the sum of two exponential components. After complete optical erasure, diffraction efficiency η increases in the dark (i.e., dark developing) up to ∼17% of the saturation value ηs≅0.12 and then decays to zero in ∼4 h. All experimental results are reasonably well simulated by a model in which the Fe2+/Fe3+ light-induced charge distribution is compensated for by a light-insensitive species (ionic charges or holes) that is mobile at room temperature.

© 2000 Optical Society of America

OCIS Codes
(130.3130) Integrated optics : Integrated optics materials
(130.3730) Integrated optics : Lithium niobate
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.5330) Nonlinear optics : Photorefractive optics

Citation
A. Méndez, A. García-Cabañes, M. Carrascosa, and J. M. Cabrera, "Photorefractive charge compensation in α-phase proton-exchanged LiNbO3 waveguides," J. Opt. Soc. Am. B 17, 1412-1419 (2000)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-17-8-1412


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