Coupled-Wave Analysis of Holographic Storage in LiNbO3

Staebler, D. L.; Amodei, J. J.

doi:10.1063/1.1661215

Cited by 360 publications

(45 citation statements)

References 15 publications

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“…The transmitted light powers of S beam and R beam were set as 1:150. The evidenced steady-state energy transfer indicated that the diffusion effect dominated the UV photorefraction process [17,29], which is similar to the results of CLN crystals reported in other works (e.g., [25,30]). More importantly, the direction of energy transfer was toward to the −c end, which revealed that the sign of UV-excited carriers was negative and electrons were the dominant carriers.…”

Section: Light Erasing Behavior and Amplificationsupporting

confidence: 80%

Improvement in the Photorefractive Response Speed and Mechanism of Pure Congruent Lithium Niobate Crystals by Increasing the Polarization Current

et al. 2017

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A series of pure congruent lithium niobate (LiNbO 3 , CLN) crystals were grown and directly polarized under different electric currents in the growth furnace. Their holographic properties were investigated from the ultraviolet to the visible range. The response time shortened, whereas the diffraction efficiency increased incrementally with the electric current. In particular, the response time of CLN polarized under 100 mA can be reduced by a factor of 10 with a still high saturation diffraction efficiency of about 40.8% at 351 nm. Moreover, its response speed improved by 60 times and 10 times for 473 and 532 nm laser, respectively. The light erasing behavior implies that at least two kinds of photorefractive centers exist in the crystals. Increasing the polarization current induces two pronounced UV absorption peaks and a wide visible absorption peak in CLN crystals. The diffusion effect dominates the photorefractive process and electrons are the dominant carriers. The possible mechanism for the fast photorefractive response is discussed. Increasing the polarization electric current is an effective method to improve the photorefractive response of LN crystal.

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Section: Light Erasing Behavior and Amplificationsupporting

confidence: 80%

Improvement in the Photorefractive Response Speed and Mechanism of Pure Congruent Lithium Niobate Crystals by Increasing the Polarization Current

et al. 2017

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“…Il fut proposé dès 1969 pour décrire l'effet photoréfractif [3]. Il a d'abord été résolu pour des cas particuliers [9][10][11][12][13][14][15][16][17][18] (longueurs de diffusion très petites ou très grandes devant la période de la variation d'intensité lumineuse). Le développement le plus utile fut donné par Kukhtarev et col. en 1979 [19,20].…”

Section: Présentation Du Modèleunclassified

L'effet photoréfractif

Pauliat

Roosen

1998

l'Optique Non Linéaire Et Ses Matériaux

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Résumé : La souplesse d'emploi des matériaux photoréfractifs est un de leurs principaux attraits. Un même échantillon est sensible sur une plage de longueurs d'onde de plus de 100 nm avec des temps de réponse s'étageant de moins d'une nanoseconde à plus d'une seconde en fonction de la puissance optique mise en jeu. Cette richesse explique le succès de l'effet photoréfractif et aussi les centaines de publications annuelles sur ce sujet. De nombreux matériaux photoréfractifs aux caractéristiques très diverses sont disponibles commercialement. Bien qu'il ne soit pas possible de résumer ici l'ensemble de ces résultats, nous présentons les notions indispensables à la compréhension de ce phénomène nonlinéaire, à l'utilisation de ces matériaux, et au choix des échantillons. Nous n'abordons pas le vaste domaine des applications.

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“…The principle how to judge carrier type in LiNbO 3 crystals by holographic technique can be described as follows: 15 If hole carriers are the main carriers, when read the grating with R beam, the R beam will interference with its diffraction light and form a light intensity distribution mode. Then light induced free hole will accumulate in the low light intensity region via diffusion.…”

Section: Methodsmentioning

confidence: 99%

Investigation on p-type lithium niobate crystals

Pei

Kong

et al. 2011

AIP Advances

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Till now it is difficult to obtain a p-type lithium niobate crystal. Here the carrier types in various doped and oxidized LiNbO3 crystals have been investigated by holographic technique. The experimental results show tetravalent ions (Zr4+ and Hf4+) with doping concentrations just above optical damage resistant thresholds is helpful to increase the concentration of holes. And 3.0 mol% ZrO2 doped LiNbO3 can be used as a p-type crystal. The dominant carrier of iron doped LiNbO3 crystal can be changed to holes when treated by thermo-electric oxidization. Then the possible mechanism on how to obtain a p-type LiNbO3 was discussed

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Coupled-Wave Analysis of Holographic Storage in LiNbO3

Cited by 360 publications

References 15 publications

Improvement in the Photorefractive Response Speed and Mechanism of Pure Congruent Lithium Niobate Crystals by Increasing the Polarization Current

Improvement in the Photorefractive Response Speed and Mechanism of Pure Congruent Lithium Niobate Crystals by Increasing the Polarization Current

L'effet photoréfractif

Investigation on p-type lithium niobate crystals

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