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Reduction of the space-charge field in photorefractive crystals

Abstract : The space-charge-field amplitude inside photorefractive crystals was evaluated using three different experimental techniques: (i) two-wave mixing gain measurements, (ii) direct phase demodulation under external dc-electric field, and (iii) phase demodulation under ac-field with proper polarization filtering. The experimental data could be simultaneously fitted with the theory in the frame of the traditional one-level photorefractive model only if an additional reduction of the space-charge field is assumed. The traditional model fails to explain appearance of this reduction factor. Measurements were carried out with Bi12TiO20 and GaP photorefractive crystals
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https://hal-iogs.archives-ouvertes.fr/hal-00686039
Contributor : Marie-Laure Edwards <>
Submitted on : Friday, April 6, 2012 - 6:22:32 PM
Last modification on : Wednesday, September 16, 2020 - 5:42:11 PM
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Kimmo Paivasaari, Alexei A. Kamshilin, Philippe Delaye, Gérald Roosen. Reduction of the space-charge field in photorefractive crystals. Optics Communications, Elsevier, 2002, 213, pp.357-366. ⟨10.1016/S0030-4018(02)02082-5⟩. ⟨hal-00686039⟩

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