Przeglądaj {{ collection }} wg Autor "Górski, Piotr"

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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, Włodzimierz
A 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.
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, Włodzimierz
This 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.
Effect of temperature on the refractive index and Kerr effect of the transformer oil Nynas Nytro Taurus
(Wydawnictwo Politechniki Łódzkiej, 2009) Górski, Piotr; Ledzion, Rafał; Sadowski, Marcin; Kucharczyk, Włodzimierz
The temperature dependence of refractive index of the mineral transformer oil Nynas Nytro Taurus within the range 278-385K is determined. Changes with temperature in the quadratic electrooptic response of the oil are investigated. The results obtained indicate the usefulness of the oil as immersion liquid in measurements of the quadratic electrooptic effect and electrostriction in crystals.
The effect of the molecular weight on the electrooptic Kerr phenomenon of metyl silicon oil.
(Wydawnictwo Politechniki Łódzkiej, 2014) Marciniak, Magdalena; Hillebrand, Klaudia; Komenda, Anna; Ledzion, Rafał; Górski, Piotr
The Kerr constant and quadratic electrooptic coefficient in methyl silicon oils were measured. The dependence of their magnitude on molecular mass was determined. On the base of obtained results one cannot define the character of the dependence between determined quantities and molecular mass of examined oils.
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, Włodzimierz
An 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.
The impact of aromatic additives on kerr effect in rapeseed oil.
(Wydawnictwo Politechniki Łódzkiej, 2015) Komenda, Anna; Górski, Piotr; Ledzion, Rafał; Izdebski, Marek
The Kerr constant and quadratic electro-optic effect were determined for a few different rapeseed oils. The aim of the study was to investigate if aromatic additives in the oil influence its optical properties. Moreover, the effect of ageing of the oils on Kerr phenomena was observed.
Influence of electrode material spacing between electrodes on measurement of Kerr constant in castor oil.
(Wydawnictwo Politechniki Łódzkiej, 2014) Perek, Artur; Ledzion, Rafał; Izdebski, Marek; Nowakowski, Krystian; Górski, Piotr
The influence of the electrode material and of the spacing between electrodes on Kerr constant in castor oil is investigated. It is shown that the spacing of the electrodes influences the measurement of Kerr constant whereas the electrode material has no influence on the results of the measurement.
Kerr constant of Fomblin Z
(Wydawnictwo Politechniki Łódzkiej, 2008) Ledzion, Rafał; Karolczak, Stefan; Górski, Piotr; Kucharczyk, Włodzimierz
The 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.
Matrices of the tensor with the internal symmetry [V2][V5]
(Wydawnictwo Politechniki Łódzkiej, 2012) Kucharczyk, Włodzimierz; Górski, Piotr; Ledzion, Rafał
Matrices 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.
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, Marek
It 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.
On the possibility of measurements of nonlinear electrooptic effects in 432 symmetry crystals
(Wydawnictwo Politechniki Łódzkiej, 2011) Kucharczyk, Włodzimierz; Górski, Piotr; Izdebski, Marek; Ledzion, Rafał
It 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.
Optimization of measurement conditions of Kerr constant in optical active liquids on the example of castor oil.
(Wydawnictwo Politechniki Łódzkiej, 2014) Nowakowski, Krystian; Perek, Artur; Izdebski, Marek; Ledzion, Rafał; Górski, Piotr
The results of measurements of Kerr constant in castor oil, obtained by dynamic-polarimetric method are presented. Variable optical path length and four measurement setup configurations were used. They differed by the orientation of polarizer and of quarterwave plate and therefore they were non-equivalent when other, unwanted effects occurred. It was shown that the Kerr constant measurement performed with use of only one system configuration and one length of optical path may be strongly affected by other effects, however taking the arithmetic mean of two results obtained from appropriate system configurations significantly reduces this error. Theoretical dependences were fitted to the experimental results, which allowed for approximation of other constants, like dichroism, linear birefringence and optical activity induced by external electric field (electrogyration).
Temperature dependence of the Kerr constant of fomblin M03.
(Wydawnictwo Politechniki Łódzkiej, 2016) Ledzion, Rafał; Górski, Piotr; Izdebski, Marek; Kucharczyk, Włodzimierz
The 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.
What is the symmetry of castor oil between metal electrodes?
(Wydawnictwo Politechniki Łódzkiej, 2012) Izdebski, Marek; Ledzion, Rafał; Górski, Piotr
Presented experimental data show that castor oil between metal flat electrodes can not be satisfactorily described as an isotropic liquid of ∞ ∞ symmetry, even in the absence of an electric field between the electrodes. Correct description of optical properties requires the assumption of 2 ∞ symmetry and consideration of circular birefringence, linear birefringence and dichroism occurring at the same time. Disappearance of linear birefringence and dichroism in castor oil has been observed several days after filling cuvette witch metal electrodes, which suggests the usefulness of such measurements to study the aging processes. The results presented are also important for correct interpretation of future measurements of electro-optic and electrogyration effects in liquids.
What is the true order of magnitude of the quadratic electrooptic coefficient |g1111-g1122| in RDP crystal?
(Wydawnictwo Politechniki Łódzkiej, 2007) Górski, Piotr; Kilański, Łukasz; Ledzion, Rafał; Kucharczyk, Włodzimierz
Measurements based on the dynamic polarimetric technique of the electrooptic coefficient |g1111-g1122| are applied to determine the order of magnitude of the quadratic electrooptic effect in RDP. The results obtained confirm that the effect is two orders of magnitude smaller than widely quoted in the literature data obtained previously by the static polarimetric method.