Abstract
We have optically characterized the newly-developed photorefractive crystal KNSBN: Cu by two-wave coupling at visible and near-infrared wavelengths. The effective electrooptic coefficientsξ(k g)r 13 andξ(k g)r 33, the effective charge carrier densityN eff, the dark conductivityσ d, the product of mobility and electron-trap recombination timeμτ R, the formation and decay rate of index grating and the absorption coefficientα of the crystal were determined from visible to near-infrared wavelengths. Their wavelength dependences were also studied. It is interesting to notice that the KNSBN: Cu crystal has a very largeN eff and large gain coefficientΓ for ordinary ray (o-ray) in the visible region, and the photorefractive properties of the crystal are very different in the visible and near-infrared spectral regions.
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Zhang, H., Guo, B., Jiang, H. et al. Characterization of the KNSBN: Cu crystal with two-wave coupling at visible and infrared wavelengths. Appl. Phys. B 61, 207–211 (1995). https://doi.org/10.1007/BF01090945
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DOI: https://doi.org/10.1007/BF01090945