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Demyanyshyn N.M.,NASU Karpenko Physico Mechanical Institute | Mytsyk B.G.,NASU Karpenko Physico Mechanical Institute | Kost Y.P.,NASU Karpenko Physico Mechanical Institute | Solskii I.M.,Scientific Research Company carat | Sakharuk O.M.,NASU Karpenko Physico Mechanical Institute
Applied Optics | Year: 2015

The anisotropy of piezo- and elasto-optic effects in calcium tungstate CaWO4 crystals was studied by the indicatory surfaces method. On the basis of the maximumsurfaces of the elasto-optic effect, the geometry of acousto-optic interaction with maximum efficiency was found. © 2015 Optical Society of America.


Kavetskyy T.S.,Drohobych Ivan Franko State Pedagogical University | Kavetskyy T.S.,Scientific Research Company carat
Semiconductors | Year: 2011

The impact of the sample thickness and γ-irradiation dose on the magnitude of total and static radiation-induced optical effects in chalcogenide vitreous semiconductors is studied using the example of Ge-Sb-S alloys of the Ge23.5Sb11.8S64.7 chemical composition. It is established that, at comparable ratios between the doses of γ-irradiation (Φ = 3.0 and 7.72 MGy) and thicknesses of the samples (d = 1.0 and 1.7 mm), the dose change more essentially affects the occurrence of radiation-induced optical effects in the semiconductors examined. © 2011 Pleiades Publishing, Ltd.


Mytsyk B.G.,NASU Karpenko Physico Mechanical Institute | Kost' Y.P.,NASU Karpenko Physico Mechanical Institute | Demyanyshyn N.M.,NASU Karpenko Physico Mechanical Institute | Andrushchak A.S.,Lviv Polytechnic | Solskii I.M.,Scientific Research Company carat
Crystallography Reports | Year: 2015

All components of the piezo-optic coefficient matrix of calcium tungstate crystals, belonging to the 4/m symmetry class, are determined. The reliability of the piezo-optic effect measurements in CaWO4 crystals is achieved by determining each piezo-optic coefficient from several experimental geometries and is also based on the correlation of the absolute piezo-electric coefficients and the path-difference coefficients. The rotation-shear diagonal coefficients π44 and π66 and three principal piezo-optic coefficients π11, π13, and π31 are refined by the polarization-optical method. It is confirmed that both the interferometric and polarization-optical methods should be used to study the piezo-optic effect with high accuracy. The results show that calcium tungstate is a promising material for acousto-optical and photoelastic modulation. © 2015, Pleiades Publishing, Inc.


Sugak D.Y.,Scientific Research Company carat | Sugak D.Y.,Lviv Polytechnic
International Conference on Oxide Materials for Electronic Engineering - Fabrication, Properties and Applications, OMEE 2014 - Book of Conference Proceedings | Year: 2014

The paper is to discuss the main characteristics of the influence of high temperature annealing in different gas environments on the optical and structural properties of congruent lithium niobate crystals. © 2014 IEEE.


Sugak D.Y.,Lviv Polytechnic | Sugak D.Y.,Scientific Research Company carat
Solid State Phenomena | Year: 2015

The paper is to discuss the main characteristics of the influence of high temperature annealing in different gas environments on the optical and structural properties of congruent lithium niobate crystals. © (2015) Trans Tech Publications, Switzerland.

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