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Proceedings Paper

Activation energy of thermal fixing in LiNbO3: a comparative study
Author(s): Mostafa A. Ellabban; Gabor Mandula; Romano A. Rupp; Martin Fally; E. Hartmann; Laszlo Kovacs; K. Polgar
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Paper Abstract

The activation energy of thermal fixing is determined in congruent and nearly stoichiometric lithium niobate crystals doped with manganese or iron, respectively. Three different techniques were employed: two-wave mixing, holographic scattering and DC conductivity measurements. A comparison between the three techniques is made and the possible reasons for the discrepancy in the values of the activation energy are discussed. Holographic techniques have the advantage of being contactless methods by which problems coming from electrodes effects are ignored. The holographic scattering technique is much simpler than two-wave mixing technique and gives the same results at high density of the compensating ions. At low free ions concentration it is an ideally sensitive technique to detect the possible dependence of the compensation time constant on the spatial frequency and to determine the concentration of free ions that are responsible for thermal fixing.

Paper Details

Date Published: 5 February 2002
PDF: 9 pages
Proc. SPIE 4607, Selected Papers from Fifth International Conference on Correlation Optics, (5 February 2002); doi: 10.1117/12.455236
Show Author Affiliations
Mostafa A. Ellabban, Univ. Wien (Austria)
Gabor Mandula, Research Institute for Solid State Physics and Optics (Hungary)
Romano A. Rupp, Univ. Wien (Austria)
Martin Fally, Univ. Wien (Austria)
E. Hartmann, Research Institute for Solid State Physics and Optic (Hungary)
Laszlo Kovacs, Research Institute for Solid State Physics and Optics (Hungary)
K. Polgar, Research Institute for Solid State Physics and Optics (Hungary)


Published in SPIE Proceedings Vol. 4607:
Selected Papers from Fifth International Conference on Correlation Optics

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