Kaczmarek, M., Ross, G.W. and Eason, R.W.
Intensity-dependent absorption and its modelling in infrared sensitive rhodium-doped BaTiO3
Optics Communications, 126, (1-3), . (doi:10.1016/0030-4018(96)00046-6).
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We investigated the intensity-dependent absorption coefficient of photorefractive Rh:BaTiO3 from the maximum (633 nm) to the near infra-red end (1.06 µm) of this crystal's sensitivity. A numerical photorefractive model, incorporating dual-wavelength illumination and a secondary photorefractive centre, gives good agreement with experiment and shows that such a two-centre model is sufficient to explain the results obtained in the visible and infrared wavelength region
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