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Detection of small phase modulation using two-wave mixing in photorefractive crystals

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Abstract.

Two-wave mixing of phase-modulated beams in photorefractive crystals under a dc electric field is studied both theoretically and experimentally. Based on the vectorial theory of light diffraction in crystals of cubic symmetry, we derived an analytical expression that describes the phase demodulation in crystals with an arbitrarily oriented electric field. The phase-demodulation technique was used for estimation of the space-charge field created in photorefractive crystals. It is shown that the space-charge-field grating created in GaP and Bi12TiO20 crystals is much smaller than that predicted from the one-level band-transport model of the photorefractive effect.

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Authors and Affiliations

  1. Department of Physics, University of Joensuu, P.O. Box 111, 80101 Joensuu, Finland, FI

    N.I. Nazhestkina, A.A. Kamshilin, O.V. Kobozev, V.V. Prokofiev & T. Jääskeläinen

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  1. N.I. Nazhestkina
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  2. A.A. Kamshilin
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  3. O.V. Kobozev
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  4. V.V. Prokofiev
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  5. T. Jääskeläinen
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Received: 12 December 2000 / Revised version: 8 February 2001 / Published online: 27 April 2001

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Nazhestkina, N., Kamshilin, A., Kobozev, O. et al. Detection of small phase modulation using two-wave mixing in photorefractive crystals . Appl Phys B 72, 767–773 (2001). https://doi.org/10.1007/s003400100583

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  • DOI: https://doi.org/10.1007/s003400100583

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