3 December 2003 Bright photorefractive spatial solitons in barium-calcium titanate crystals
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We report the experimental investigation both, of the one - dimensional and two - dimensional bright screening spatial solitons in a promising photorefractive crystal of barium - calcium titanate doped with iron. The effects of the partial trapping of the spatially incoherent ordinarily polarized background light within the soliton - induced planar waveguide as well as the regular oscilations of the light beam intensity and width during the beam self - focusing are observed. For the crystal sample, doped with higher dose of iron (290 ppm), we also find the self - defocusing of light beams due to the light - induced negative photovoltaic lens in the absence of the externally applied electric field.
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Vladymir M. Shandarov, Detlef Kip, Monika Wesner, Jingjun Xu, "Bright photorefractive spatial solitons in barium-calcium titanate crystals", Proc. SPIE 5257, Ninth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, (3 December 2003); doi: 10.1117/12.545850; https://doi.org/10.1117/12.545850

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