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Complete sets of elastic constants and photoelastic coefficients of pure and MgO-doped lithium niobate crystals at room temperature

Abstract :

This paper presents the results of ultrasonic measurements of LiNbO3 and LiNbO3:MgO crystals. The tensors of piezoelectric coefficients, elastic stiffness constants, and elastic compliances are determined for both crystals at room temperature. Combining these data with the results of piezo-optical measurements, a complete set of photoelastic tensor coefficients is also calculated. Doping of LiNbO3 crystals by MgO does not lead to a considerable modification of their elastic and photoelastic properties. However, LiNbO3:MgO is characterized by a considerably higher resistance with respect to powerful light radiation, making it promising for future application in acousto-optic devices that deal with superpowerful laser radiation. Presented here are the complete tensor sets of elastic constants and photoelastic coefficients of LiNbO3 and LiNbO3:MgO crystals that may be used for a geometry optimization of acousto-optical interaction providing the best diffraction efficiency of acousto-optical cells made of these materials.

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https://hal.univ-angers.fr/hal-03420368
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Soumis le : mardi 9 novembre 2021 - 10:36:38
Dernière modification le : mercredi 5 janvier 2022 - 03:47:12
Archivage à long terme le : : jeudi 10 février 2022 - 18:27:18

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A.-S. Andrushchak, B.-G. Mytsyk, H.-P. Laba, O.-V. Yurkevych, I.-M. Solskii, et al.. Complete sets of elastic constants and photoelastic coefficients of pure and MgO-doped lithium niobate crystals at room temperature. Journal of Applied Physics, American Institute of Physics, 2009, 106 (7), pp.073510 - 073510-6. ⟨10.1063/1.3238507⟩. ⟨hal-03420368⟩

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