Abstract

Photorefractive gratings are recorded in lithium niobate crystals in the presence of externally applied electric fields close to the coercive field. After optical erasure a voltage pulse above the poling threshold is applied, and by these means a photorefractive grating reappears that can be erased optically. The results point to electrical fixing, i.e., ferroelectric domain reversal induced by a space-charge field.

© 2004 Optical Society of America

Optimization of electrical fixing in near-stoichiometric iron-doped lithium niobate crystals

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Vapor-transport equilibrated near-stoichiometric lithium tantalate for frequency-conversion applications

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Thermal fixing of holograms and their electrically assisted development in barium calcium titanate crystals

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Holographic phase-shift measurement during development of a fixed grating in lithium niobate crystals

Ivan de Oliveira, Jaime Frejlich, Luis Arizmendi, and Mercedes Carrascosa
Opt. Lett. 28(12) 1040-1042 (2003)