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Proceedings Paper

Measurement of birefringent media parameters in optical vortex interferometer with polarizing elements
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Paper Abstract

We present the results of birefringent media properties measurement using two different interferometers with polarizing elements. These setups allow to generate regular and stable lattice of optical vortices (OVs) and to record the lattice deformations caused by introduced birefringent plate. The first setup is a polariscope arrangement with two Wollaston compensators placed between crossed polarizers. The shape of lattice basic cell is determined by the Wollaston's shearing angle and examined birefringent medium causes only the shift of the whole OVs lattice. The calculated displacement vector allows determining at least two parameters of measured medium simultaneously. This setup was used also to measure the absolute value of the phase shift introduced by examined birefringent sample by using two light sources with slightly different wavelength. We manage to determine the phase retardance order by tracking the center of two interferograms made with and without sample. The second setup is based on modified Mach-Zehnder interferometer in which the Wollaston compensator is inserted into the one of interferometer's arm. The measured birefringent medium placed in another interferometer's arm causes the mutual displacement of two OVs sublattices with different topological signs. Calculated displacements vectors between those two sublattices allows to determine birefringent sample parameters.

Paper Details

Date Published: 20 November 2008
PDF: 7 pages
Proc. SPIE 7141, 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 71410L (20 November 2008); doi: 10.1117/12.822366
Show Author Affiliations
Marcelina Banach, Wroclaw Univ. of Technology (Poland)
Władysław A. Woźniak, Wroclaw Univ. of Technology (Poland)
Piotr Kurzynowski, Wroclaw Univ. of Technology (Poland)
Agnieszka Popiołek-Masajada, Wroclaw Univ. of Technology (Poland)
Monika Borwińska, Wroclaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 7141:
16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics
Agnieszka Popiolek-Masajada; Elzbieta Jankowska; Waclaw Urbanczyk, Editor(s)

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