20 November 2008 Measurement of birefringent media parameters in optical vortex interferometer with polarizing elements
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Proceedings Volume 7141, 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 71410L (2008) https://doi.org/10.1117/12.822366
Event: 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2008, Polanica Zdroj, Poland
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.
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Marcelina Banach, Marcelina Banach, Władysław A. Woźniak, Władysław A. Woźniak, Piotr Kurzynowski, Piotr Kurzynowski, Agnieszka Popiołek-Masajada, Agnieszka Popiołek-Masajada, Monika Borwińska, Monika Borwińska, } "Measurement of birefringent media parameters in optical vortex interferometer with polarizing elements", 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; https://doi.org/10.1117/12.822366
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