Abstract

The thermal lens was investigated in ${{\rm CaF}_2}$ and ${{\rm Tb}_3}{{\rm Ga}_5}{{\rm O}_{12}}$ cubic crystals with [001] crystallographic axes orientation and in magneto-optical glass MOG103 by the method of phase-shifting interferometry. It was demonstrated experimentally that the thermal lens has astigmatism determined by the incident radiation polarization state and by the optical anisotropy parameter $\xi$. A method of $\xi$ determination by measuring thermal lens astigmatism in cubic crystals with [001] orientation was proposed and verified. It was shown that thermally induced depolarization and the amplitude of phase astigmatism depend on the position of the crystal with [001] orientation in antiphase.

© 2020 Optical Society of America

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Supplementary Material (1)

NameDescription
Visualization 1       Typical behavior of the distribution of the astigmatic part of thermally induced phase distortions during continuous rotation of an optical element made of a cubic single crystal with orientation [001].

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