Effect of rhodium doping on the photorefractive properties of BCT crystalsReport as inadecuate




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1 Laboratoire Charles Fabry de l-Institut d-Optique - Manolia LCFIO - Laboratoire Charles Fabry de l-Institut d-Optique 2 Fachbereich Physik Osnabrück

Abstract : We present an experimental investigation of the photorefractive properties of rhodium doped barium calcium titanate crystals of the congruently melting composition Ba0.77Ca0.23TiO3. We have studied the photorefractive properties of several crystals undoped, rhodium or iron doped. All the crystals are sensitive in the infrared region lambda=850 nm. We have found that a three level model of photorefraction is necessary to explain the experimental results. This study has put forward the fact that the BCT crystals that we have studied contain a large amount of iron, which damages the good photorefractive properties of the crystal. Indeed, the high intensity needed to saturate the gain Isat >1W-cm2, which is an important drawback for many applications, seems to be due to iron





Author: Sylvie Bernhardt - H. Veenhuis - Philippe Delaye - Gérald Roosen -

Source: https://hal.archives-ouvertes.fr/



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