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Intensity-dependent absorption and its modelling in infrared sensitive rhodium-doped BaTiO3

M.Kaczmarek1, G.W.Ross and R.W.Eason
Optoelectronics Research Centre and Department of Physics

M.J.Damzen, R.Ramos-Garcia2
The Blackett Laboratory, Imperial College, Prince Consort Rd, London SW7 2BZ, UK

M.H.Garrett
Deltronics Crystal Industries Inc. 60 Harding Avenue,

Abstract

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.


Optics Communications (1996) Vol.126 pp.175-184

doi: 10.1016/0030-4018(96)00046-6

 

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Copyright University of Southampton 2006