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Depth-resolved photorefractive characterization of lithium niobate doped with iron by thermal diffusion

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Abstract

Iron doping of lithium niobate crystals by thermal diffusion is a well-established technique for the realization of spatially confined photorefractive stages in integrated optical devices. In this paper we present an innovative method able to realize depth-resolved holographic measurements inside the iron-diffused layer, so that in-depth profiles of the main photorefractive parameters can be derived without the need of any waveguide. By means of this technique it is possible to achieve a better knowledge of the influence of different surface treatments on the photorefractive performances of iron-diffused layers and to link them to the results of other depth-resolved characterization techniques in the framework of microscopic models of photorefractivity.

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Acknowledgements

This work has been partially supported by the University of Padova, Progetto di Ateneo CPDA073231/07, ‘Doping and microstructuration of lithium niobate crystals for holographic recording in integrated optics’ and by the PRIN08 project (prot. 20088ZA8H9_002) funded by the Italian Ministry of University and Research (MIUR).

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Authors and Affiliations

  1. Dipartimento di Fisica ‘G. Galilei’ and CNISM, Università di Padova, Via Marzolo 8, 35131, Padova, Italy

    A. Zaltron, M. Bazzan, N. Argiolas, M. V. Ciampolillo & C. Sada

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  1. A. Zaltron
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  2. M. Bazzan
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  3. N. Argiolas
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  4. M. V. Ciampolillo
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  5. C. Sada
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Correspondence to A. Zaltron.

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Zaltron, A., Bazzan, M., Argiolas, N. et al. Depth-resolved photorefractive characterization of lithium niobate doped with iron by thermal diffusion. Appl. Phys. B 108, 657–663 (2012). https://doi.org/10.1007/s00340-012-5021-x

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  • DOI: https://doi.org/10.1007/s00340-012-5021-x

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