Intensity redistribution in a thin photorefractive crystal caused by strong fanning effect and internal reflections

Kamshilin, Alexei A.; Raita, Erik; Khomenko, A. V.

doi:10.1364/josab.13.002536

Cited by 38 publications

(12 citation statements)

References 18 publications

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“…Ils s'utilisent souvent sans dopage particulier. La densité effective de pièges est alors de l'ordre de [183,184] : Les absorptions sont typiquement de a = 1 cm" 1 à la longueur d'onde de 514 nm. Un dopage, par exemple au cuivre, permet augmenter la densité effective de pièges et l'absorption.…”

Section: Présentation Et Valeurs Des Paramètresunclassified

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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Section: Présentation Et Valeurs Des Paramètresunclassified

L'effet photoréfractif

Pauliat

Roosen

1998

l'Optique Non Linéaire Et Ses Matériaux

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“…3͑a͒, that the higher electric field is applied to the crystal the faster the MPPC-response time is observed. 13,15 These waves appear in the crystal with the strong fanning effect because of internal reflections of fanned beams on the crystal side surface and from the photorefractive gratings recorded near that surface. Similar character of the fanning response was reported recently for fiberlike BTO crystals.…”

Section: Fast Mutually Pumped Phase Conjugation Using Transient Photomentioning

confidence: 99%

Fast mutually pumped phase conjugation using transient photorefractive coupling

Raita

Kamshilin

Prokofiev

et al. 1997

Applied Physics Letters

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Unusually fast mutually pumped phase-conjugation (MPPC) is achieved in a Bi12TiO20 crystal by using transient photorefractive beam coupling under a dc electric field. Pulses of phase-conjugate waves with a buildup time of 4.5 ms and a width of 50 ms at an input intensity of 2×0.8 W/cm2 are obtained after applying a rising front of external electric field to the crystal. A phase-conjugation efficiency as high as 25% of the incident light power is measured.

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“…Nonlinear photorefractive surface waves (PRSWs) formed on the surface of a photorefractive crystal (PRC) by a diffusion mechanism have been studied for a long time [1][2][3][4][5][6][7][8]. These self-guided, spatially confined waves can propagate along the boundary between the crystal and a metallic, a dielectric layer of a lower refractive index or a similar PRC with opposite sign of nonlinearity.…”

Section: Introductionmentioning

confidence: 99%

“…The most attractive feature of a PRSW is the effective concentration of beam energy within the narrow surface layer which can significantly increase the operation speed of the photorefractive devices without a specially prefabricated wave-guiding structure [6]. On the other hand, photorefractive surface waves with a diffusion mechanism exhibiting nonlinearity have been observed experimentally in BaTiO 3 [7,8].…”

Section: Introductionmentioning

confidence: 99%

Photorefractive surface waves at the interface of Sr_0.6Ba_0.4NbO₃and air with diffusion mechanism

Zhang

Yang

Kang

et al. 2007

Journal of Modern Optics

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Photorefractive surface waves on the surface of Sr 0.6 Ba 0.4 NbO 3 with a diffusion mechanism of nonlinearity have been observed. The formation time of the photorefractive surface waves is related to the intensity of the incident beam and the background illumination. The formation time of the photorefractive surface waves is about 40 min with a beam intensity of 3 mW, 25 min with 10 mW, and 30 s with 10 mW when an additional background illumination is applied. The experimental results showed that an appropriate background illumination will shorten the photorefractive response time.

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Intensity redistribution in a thin photorefractive crystal caused by strong fanning effect and internal reflections

Cited by 38 publications

References 18 publications

L'effet photoréfractif

L'effet photoréfractif

Fast mutually pumped phase conjugation using transient photorefractive coupling

Photorefractive surface waves at the interface of Sr_0.6Ba_0.4NbO₃and air with diffusion mechanism

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Intensity redistribution in a thin photorefractive crystal caused by strong fanning effect and internal reflections

Cited by 38 publications

References 18 publications

L'effet photoréfractif

L'effet photoréfractif

Fast mutually pumped phase conjugation using transient photorefractive coupling

Photorefractive surface waves at the interface of Sr0.6Ba0.4NbO3and air with diffusion mechanism

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Product

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Photorefractive surface waves at the interface of Sr_0.6Ba_0.4NbO₃and air with diffusion mechanism