OPTICALLY-INDUCED REFRACTIVE INDEX INHOMOGENEITIES IN LiNbO3 AND LiTaO3

Ashkin, A.; Boyd, G. D.; Dziedzic, J. M.; Smith, Richard; Ballman, A. A.; Levinstein, J. J.; Nassau, K.

doi:10.1063/1.1754607

Cited by 969 publications

(261 citation statements)

References 13 publications

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“…yielding a distortion of the light beam profile, an effect known as the photorefractive effect or optical damage [6]. Doping LiNbO 3 with magnesium (LiNbO 3 :Mg) at doping levels of 5 mol% in congruently melting material suppresses the photorefractive effect very efficiently [7].…”

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confidence: 99%

Radiation-damage-assisted ferroelectric domain structuring in magnesium-doped lithium niobate

et al. 2009

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Irradiation of 5% magnesium-doped lithium niobate crystals (LiNbO 3 :Mg) with high-energy, low-mass 3 He ions, which are transmitted through the crystal, changes the domain reversal properties of the material. This enables easier domain engineering compared to non-irradiated material and assists the formation of small-sized periodically poled domains in LiNbO 3 :Mg. Periodic domain structures exhibiting a width of ≈520 nm are obtained in radiation-damaged sections of the crystals. The ferroelectric poling behavior between irradiated and non-treated material is compared.PACS 78.20 · 42.65

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confidence: 99%

Radiation-damage-assisted ferroelectric domain structuring in magnesium-doped lithium niobate

et al. 2009

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“…The degradation of the sensitivity upon cycling can be virtually eliminated by choosing the writing polarization E I c, the erasure polarization E -c, and by using higher powers. The fatigued sensitivity at 7.5 watts/cm 2 for this combination of polarizations was 8.2 ± 0.3 %/joule/cm2 the initial sensitivity was 10 ± 1 %/joule/cm 2 The sensitivity was found to be dependent only upon the writing and erasure conditions for the previous three or four cycles. Optical treatment prior to the last few cycles had no effect on the sensitivity.…”

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confidence: 79%

Sensitivity and fatigue of LiTaO3 for holographic recording

Spinhirne

Estle

1974

Applied Physics Letters

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The sensitivity of crystals of LiTaO3 to hologram formation has been observed to vary with impurity concentration from a value comparable to the most sensitive doped LiNbO3 for an impure crystal to a value more than five orders of magnitude smaller for a purer crystal. Fatigue effects were observed upon write-erase cycling. These effects were dependent upon writing and erasure polarization and power and could be virtually elim proper choice of optical parameters. --------------\AWork by Chen 1 has indicated that LiTa0 3 is ese than LiNb03 to laser induced refractive index changes. Other workers 2 have found some LiTa0 3 crystals to be insusceptible to laser damage. Our measurements indicate that, although a pure LiTa03 crystal is less sensitive to phase hologram formation than pure LiNb033, impurities in LiTa03 can increase the sensitivity to a value comparable to that of the most sensitive doped LiNb03In LiTaO3 the sensitivity to hologram formation was observed to decrease after repeated cycles of writineand_otical erasure, i.e. (NASA-CR13 6 7 6 7) SENSITIVITY AND FATIGUE OF N75-18545.

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“…Découvert à la fin des années soixante comme un effet indésirable dans les modulateurs électro-optiques en LiNbO 3 [ASH66], le « dommage optique » est très vite devenu « l'effet photoréfractif » quand on a montré qu'il était possible de l'utiliser pour l'enregistrement d'hologrammes dynamiques [CHE68]. Les principales caractéristiques de l'effet photoréfractif sont alors rapidement identifiées.…”

Section: /20unclassified

Matériaux photoréfractifs

Delaye¹,

Roosen²

2003

Élaboration Et Caractérisation Des Cristaux Massifs Et en Couches Minces Pour l'Optique

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Résumé. Les matériaux photoréfractifs sont les matériaux parmi les plus utilisés dans les dispositifs basés sur l'holographie dynamique. De nombreuses applications utilisant ces matériaux sont développées et certaines ont maintenant débouché sur des dispositifs disponibles commercialement. Par ailleurs la recherche sur l'optimisation et l'augmentation des performances des matériaux photoréfractifs reste très active. Le but de cet article est de présenter les phénomènes et les équations à la base de l'effet photoréfractif. Les paramètres régissant l'effet photoréfractif et leurs liens avec les caractéristiques physiques du matériau sont décrits. Dans un second temps, les montages de bases qui permettent d'utiliser l'effet photoréfractif (diffraction et mélange à deux ondes) sont présentés en insistant sur leur utilisation pour la caractérisation des matériaux.Mots-clés. Effet photoréfractif, mélange d'ondes, holographie, transport de charges, optique non linéaire.Élaboration et caractérisation des cristaux massifs et en couches minces pour l'optique

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OPTICALLY-INDUCED REFRACTIVE INDEX INHOMOGENEITIES IN LiNbO3 AND LiTaO3

Cited by 969 publications

References 13 publications

Radiation-damage-assisted ferroelectric domain structuring in magnesium-doped lithium niobate

Radiation-damage-assisted ferroelectric domain structuring in magnesium-doped lithium niobate

Sensitivity and fatigue of LiTaO3 for holographic recording

Matériaux photoréfractifs

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