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- W2015557260 abstract "We report on the reversal of degradation of information masks stored in self-defocusing lithium niobate. After a long writing time, the image degradation appears as the splitting of refractive-index patterns stored in the medium. The reversal is achieved simply by illuminating the crystal with incoherent light from a halogen lamp. The reversal occurs because the refractive-index changes responsible for the splitting are of a smaller magnitude and are therefore erased first during incoherent illumination. Additionally, we gain insight into the storage, degradation, and erasure dynamics using a time-dependent numerical model of the photorefractive effect in this medium. Since the data can be recovered from a degraded state in which the original data are unrecognizable, this technique could be utilized in such applications as image scrambling or encryption." @default.
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- W2015557260 date "2009-08-11" @default.
- W2015557260 modified "2023-10-16" @default.
- W2015557260 title "Reversal of degradation of information masks in lithium niobate" @default.
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- W2015557260 doi "https://doi.org/10.1364/ao.48.004676" @default.
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