The effect of impurity on temperature variations in the refractive indices and thickness of TGS crystals


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Abstract

Temperature dependences of optical path difference δΔі and the relative changes in thickness δlі/l of TGS crystals doped with L-valine are studied. Temperature dependences of the relative changes in refractive indices δnі/(n–1) are calculated. The anisotropy coefficients of refractive indices Аn–1(Т) and linear expansion Аα(Т) are calculated, and a characteristic minimum of these dependences is found near the phase transition temperature.

About the authors

V. Yo. Stadnyk

Franko Lviv National University

Author for correspondence.
Email: vasylstadnyk@ukr.net
Ukraine, Lviv, 79005

B. V. Andriyevsky

Koszalin University of Technology

Email: vasylstadnyk@ukr.net
Poland, Koszalin, 75-453

V. M. Gaba

Lviv Polytechnic National University

Email: vasylstadnyk@ukr.net
Ukraine, Lviv, 79013

Z. A. Kogut

Lviv Polytechnic National University

Email: vasylstadnyk@ukr.net
Ukraine, Lviv, 79013

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