8 March 1989 Effect Of An Applied Electric Field On Photorefractive BaTiO3 Crystals
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Proceedings Volume 1017, Nonlinear Optical Materials; (1989) https://doi.org/10.1117/12.949984
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany
Generally barium titanate is used in holographic measurements (two-wave mixing, light diffraction, phase conjugating mirror...) with no external device. The large values of the electrooptic coefficients lead to good results . In 1980 few authors (Feinberg, Kratzig) showed briefly the effect of an applied electric field on photorefractive barium titanate crystals, in diffraction efficiency experiments. In this paper, the diffraction efficiency of coherent light (514 nm) on single domain BaTiO3 sample is studied as a function of the applied electric field. The enhancement of the effi-ciency with the applied d.c. field and the behaviour of the phaseshift between the photoin-duced refractive index grating and the interference light pattern are studied. Many differences are observed between Fe-doped samples and nominally pure ones. From these experiments, the limiting space charge field Eq, the density of trapped centers N, and an experimental value of the diffusion field Ed are determined.
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Alain Maillard, Romano A. Rupp, Jurgen Walter, "Effect Of An Applied Electric Field On Photorefractive BaTiO3 Crystals", Proc. SPIE 1017, Nonlinear Optical Materials, (8 March 1989); doi: 10.1117/12.949984; https://doi.org/10.1117/12.949984

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