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Dependence of the Refractive Indices in LiNbO3:Cr Crystals Doped with HfO2

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Abstract:

The dependence of the refractive indices, absorption edge and optical damage in congruent HfO2-doped LiNbO3 crystal are reported. A small amount of Cr3+ ions (0.1 mol%) was introduced in the doped crystals as optical probe. The experimental data indicates that the extraordinary and ordinary indices depend on the Hf4+ ions concentration showing a singularly for a dopant level of ~ 2.7 mol%. The dependence of the absorption edge also shows a transition region at this Hf4+concentration. The distortion of the transmitted light through samples doped with different concentrations of Hf4+ ions indicates that an inhibition of optical damages is achieved at above 3 mol% of dopant. A charge compensation mechanism is proposed to explain the role of the Hf4+ ions for the observed experimental result.

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Periodical:

Materials Science Forum (Volumes 480-481)

Pages:

423-428

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.480-481.423

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Online since:

March 2005

Authors:

E. Cantelar, G.A. Torchia, Veronica Bermúdez, D. Jaque, J.A. Sanz-Gracía, G. Lifante, T.P.J. Han, F. Jaque

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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