Artykuły (WFTIiMS)
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Pozycja Frequency dependence of the Kerr constant in nynas nytro 3000 oil determined by the polarimetric method(Wydawnictwo Politechniki Łódzkiej, 2018) Poborska, Julita; Dąbrówka, Dominika; Chwirot, Maksymilian; Ledzion, Rafał; Izdebski, Marek; Kucharczyk, WłodzimierzFrequency dependence of the Kerr constant in nynas nytro 3000 oil determined by the polarimetric method A frequency dependence of the Kerr constant K in transformer oil Nynas Nytro 3000 within a frequency range 117-5017 Hz is determined. An averaged value (2.30 ± 0.03)·10ˉ¹⁵ m/V² for K is obtained. The constant is found to be weakly frequency dependent and approaches its maximum 2.37·10ˉ¹⁵ m/V² at about 3000 Hz. The Kerr constant is of comparable value to that observed in other mineral oils employed previously in measurements of the quadratic electro-optic effect and the electrostriction in crystals.Pozycja Temperature dependence of the Kerr constant of fomblin M03.(Wydawnictwo Politechniki Łódzkiej, 2016) Ledzion, Rafał; Górski, Piotr; Izdebski, Marek; Kucharczyk, WłodzimierzThe Kerr constant B of perfluoropolyether Fomblin M03 has been determined within the temperature range 295-370K. At 300K the constant B was found to be equal to 2.8·10-15 m/V2. The measurements indicate that B varies inversely with temperature. Relatively low electro-optic response of the perfluoropolyether shows its usability in measurements of the quadratic electrooptic effect and the electrostriction in crystals.Pozycja Application of the mach-zehnder interferometer to measure the quadratic electro-optic effect in nonpolar liquids.(Wydawnictwo Politechniki Łódzkiej, 2015) Ledzion, Rafał; Górski, Piotr; Kubiak, Katarzyna; Kucharczyk, WłodzimierzA modification of Mach-Zehnder interferometer is proposed. It is shown that by introducing an additional time dependent phase shift in one of the interferometer arms, its sensitivity may be significantly increased. The method is applied to measure the quadratic electrooptic effect in transformer oil.Pozycja Analysis of measurement of quadratic electro-optic effect in castor oil(Wydawnictwo Politechniki Łódzkiej, 2013) Izdebski, Marek; Ledzion, Rafał; Kucharczyk, WłodzimierzThis works presents an extended theoretical analysis of the response of experimental setup to an applied electric field during measurements of electro-optic coefficients in optically active liquids using an optical polarimetric technique. The analysis includes liquids belonging to ∞ ∞, ∞ 2 and ∞ Curie symmetry groups and the following phenomena were taken into account: natural optical activity, natural linear birefringence, dichroism, and the effects induced by an applied electric field – linear and quadratic electro-optic effects and linear and quadratic electrogyration. The presented example concerns numerical error analysis for measurement of the quadratic electro-optic effect in castor oil, which exhibits the symmetry ∞ 2 between a pair of plane-parallel electrodes.Pozycja Estimations of the magnitude of the fourth-order electrooptic effect in KDP-type crystals(Lodz University of Technology Press, 2013) Ledzion, Rafał; Izdebski, Marek; Górski, Piotr; Kucharczyk, WłodzimierzAn attempt to measure the fourth-order electrooptic effect in KH2PO4(KDP) and NH4H2PO4(ADP) is presented. Contrary to previously reported results of the order of magnitude 10-30m4V-4, the fourth-order coefficient |g111111- g221111| is found to be lower than 5 · 10-33m4V-4and 1 · 10-34m4V-4, respectively. In addition, the effect of imperfect crystal cutting and alignment is investigated by means of calculations based on Jones calculus. It is found that even small inaccuracies may lead to an apparent fourth-order electrooptic effect comparable in magnitude to the previously reported values.Pozycja Effect of ageing on the magnitude and temperature dependence of the Kerr constant in the castor oil used in pharmacy(Wydawnictwo Politechniki Łódzkiej, 2012) Stępień, Maja; Ledzion, Rafał; Górski, Piotr; Kucharczyk, WłodzimierzThis work presents measurements of the Kerr constant and its temperature dependence in the fresh and aged castor oil used in pharmacy. It is shown that the effect of aging noticeably affects electrooptic properties of the oil.Pozycja Matrices of the tensor with the internal symmetry [V2][V5](Wydawnictwo Politechniki Łódzkiej, 2012) Kucharczyk, Włodzimierz; Górski, Piotr; Ledzion, RafałMatrices of the tensor of the internal symmetry [V2][V5] are presented for those point symmetry classes for which the matrices have not been published yet. Conditions allowing for measurements of nonlinear electrooptic effects are discussed.Pozycja On the possibility of measurements of nonlinear electrooptic effects in 432 symmetry crystals(Wydawnictwo Politechniki Łódzkiej, 2011) Kucharczyk, Włodzimierz; Górski, Piotr; Izdebski, Marek; Ledzion, RafałIt is shown that despite the fact that in 432 point group crystals the linear electrooptic effect is vetoed by symmetry there are configurations for which the third-order effect may appear. The results obtained indicate that the 432 crystals are promising media for measurements of nonlinear electrooptic effects. Macroscopic description of nonlinear electrooptic phenomena in the crystals is presented and the matrices of tensors representing the effects up to the fifth-order are given.Pozycja On the nature temperature dependence of intrinsic quadratic electrooptic coefficients in KDP-type crystals(Wydawnictwo Politechniki Łódzkiej, 2010) Kucharczyk, Włodzimierz; Ledzion, Rafał; Górski, Piotr; Izdebski, MarekIt is shown that the fourth-order electrooptic effect may be responsible for the temperature dependence of the quadratic electrooptic coefficients defined in terms of polarization. An example is given for the ammonium dihydrogen phosphate (ADP) crystal.Pozycja Kerr constant of Fomblin Z(Wydawnictwo Politechniki Łódzkiej, 2008) Ledzion, Rafał; Karolczak, Stefan; Górski, Piotr; Kucharczyk, WłodzimierzThe Kerr constant B of polyperfluoroethylenemethylene oxide Fomblin Z has been determined within the temperature range 295-323K. At 300K the constant B was found to be equal to 1.7 10(-15) m/V2. The results obtained indicate usefulness of this oligomeric compound as an immersion liquid in measurements of the quadratic electrooptic effect and electrostriction in crystals.