2003
DOI: 10.1364/josab.20.001643
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Improvements of sensitivity and refractive-index changes in photorefractive iron-doped lithium niobate crystals by application of extremely large external electric fields

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Cited by 28 publications
(14 citation statements)
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“…For both processes, the locally observed spectral shifts are equal to the ones for externally applied fields of about 200-500 kV/cm. These voltages are in the order of the breakthrough voltage [19] and in fact, we observed phenomena that suggest that a breakthrough took place. In several instances the shifts suddenly disappeared and built up again.…”
Section: +mentioning
confidence: 63%
“…For both processes, the locally observed spectral shifts are equal to the ones for externally applied fields of about 200-500 kV/cm. These voltages are in the order of the breakthrough voltage [19] and in fact, we observed phenomena that suggest that a breakthrough took place. In several instances the shifts suddenly disappeared and built up again.…”
Section: +mentioning
confidence: 63%
“…For optimizing the holographic recording in doubly doped LN crystals, theoretical analyses were prescribed the dopant densities and the oxidation-reduction processing and evaluated the actions of the parameters of the material and the system 10-16 . However, in nonvolatile holographic recording, the low photon excitation efficiency of the recording light limits its practical optimization capacity and the insufficient value of refractive-index change (RIC) requires additional energy added in the crystal. In this article, as performed in the nominally un-doped or singly doped LN crystals [17][18] , external electric field (EEF) is proposed to provide additional drift energy to compensate for the low quantum efficiency in doubly doped LN crystals. Differing from only being applied in holographic recording in singly doped LN crystals, EEF can be applied both in the recording and in the fixing phases of nonvolatile holographic recording.…”
Section: Introductionmentioning
confidence: 99%
“…The possibility to apply fields up to 650 kV/cm to LiNbO 3 : Fe crystals has been shown recently [89]. Thus one can obtain the values of the quality factor Q % 5 À 6 (see also Fig.…”
Section: Slow Photorefractive Materialsmentioning
confidence: 94%