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1
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Magnetooptic Effects in the Photonic Crystal Fiber as a Function of the Polarization State

100%
Barczak K.
Acta Physica Polonica A
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2013
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vol. 124
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issue 3
384-386
EN
In optical fibers there exists an optical birefringence induced by external factors and stress produced in technological processes. The induced birefringence makes difficult to apply optical fibers in heads of polarimetric sensors. It has been proposed to use a photonic crystal fiber working in an index guiding regime due to the small value of stress in a fiber core produced by internal and external factors. This article presents an expansion of our earlier investigations. The expansion consists of investigations concerning the influence of external magnetic field induction on the state of polarization of light in the function of an azimuth of the input linear polarization ϕ. On the basis of the resulting characteristics optimal working points of the tested fiber were determined.
2
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Magnetooptic effect of photonic crystal fiber in blue region of visible spectrum

100%
Barczak K.
|
2014
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issue 4
3
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Optical fibre current sensor for electrical power engineering

100%
Barczak K.
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2011
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issue 4
4
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Application of Photonic Crystal Fiber in Optical Fiber Current Sensors

100%
Barczak K.
Acta Physica Polonica A
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2012
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vol. 122
|
issue 5
793-795
EN
Optical fibers may be applied in the technique of measuring electric current, particularly as so-called optical current transducers. They are small in size, cheap, light and safe. Their sensitivity, however, connected with the Faraday effect, is rather poor, and they are also susceptible to considerable disturbances (deformations of the fibers). Their sensitivity can be increased by lengthening the path of effect, but this involves also an increase of noise and greater fluctuations of the measured signal due to changes of internal stresses induced by external factors. These negative phenomena can be reduced by applying fibers less sensitive to deformations. The author supposes that photonic crystal fiber with a glass core may display such properties. Orifices in the cladding can to some extent prevent the propagation of deformations from outside the core, and thus decrease the birefringence of the fiber induced by elastooptic effects. The paper presents preliminary measurements of typical photonic crystal fiber exposed to mechanical vibrations.
5
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New Optical Glasses with High Refractive Indices for Applications in Optical Current Sensors

51%
Barczak K., Pustelny T., Dorosz D., Dorosz J.
Acta Physica Polonica A
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2009
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vol. 116
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issue 3
247-249
EN
The paper concentrates on the optical fibre sensors of electric current intensity. The specially elaborated glasses with high values of refractive indices were investigated in the prepared testing stand. The glasses have possessed the refractive index values n in the range 1.6 ≤ n ≤ 2.2. For the glasses the values of the Verdet constants for two waveguides: λ_1 = 635 nm and λ_2 = 1550 nm were determined. The obtained results showed that the elaborated on the base of new glasses optical fibres are much more sensitive on the action of magnetic field than the silica fibres.
6
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Single Mode High Refractive Index Optical Fibres

51%
Dorosz D., Barczak K., Pustelny T., Dorosz J.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6A
A-63-A-68
EN
The present paper is focussed on the search of technology of new kinds of optical fibers characterised by good magnetooptical properties. The elaborated optical fibres are to apply in optical sensors of electric current and the magnetic field. In result of these researches and analyses a new optical fibre was put forward. Such optical fibers were designed, produced and subjected to extensive tests. This paper presents the results of investigations that were carried out as well as the parameters of the tested structures.
7
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Optical Fibre Magnetic Field Sensors for Monitoring οf the State of Work of Electric Motors

51%
Barczak K., Pustelny T., Zycki Z., Blazejczyk T.
Acta Physica Polonica A
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2009
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vol. 116
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issue 3
250-253
EN
The present paper deals with investigations concerning optical magnetic sensors. The most important advantage of sensors of this kind is their safety of service and insulating power. The insensitiveness of optical sensors to electromagnetic interference was discussed and experimentally investigated. The experimental investigations were concentrated on the adequate sensing fibre as well as on the sensor based on the bulk glass cylinder. The paper presents the results of magnetooptic tests of the elaborated magnetic field optical sensors and conclusions arise from them.
8
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The New Sensing Fibre for Application in Optical Fibre Current Sensor

51%
Barczak K., Pustelny T., Dorosz D., Dorosz J.
Acta Physica Polonica A
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2008
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vol. 114
|
issue 6A
A-3-A-6
EN
The present paper deals with investigations concerning optical fibre current sensors. They are mainly applied in measurements of the intensity of the electric current in the power lines as so-called optical transformers of the electrical current. The most important advantages of fibre current sensors are: safety of service, insulating power as well as their insensitiveness to electromagnetic interference. The investigations were concentrated on designing of adequate sensing fibre, and particularly on the choice of an adequate kind of glass, of which this fibre could be made. Besides, also the head of the fibre current sensor was designed, basing on the suggested and produced sensing fibre. The paper presents the results of magneto-optic tests of the glass and the sensing fibre.
9
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Optical Fibre Current Sensor for Electric Power Industry

51%
Barczak K., Pustelny T., Dorosz D., Dorosz J.
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issue 6
1087-1089
EN
The paper deals with the optical fibre current sensor based on new optical fibre made of glass with a high value of refractive index. This kind of glass was developed to meet the requirements of these optical fibres. The aim of investigations was to develop a new optical fibre with adequate magneto-optical properties and a relatively weak linear birefringence resulting from the process of its production. These features are of essential importance for optical fibre current sensors. The results of investigations concerning such optical fibres have been presented, displaying satisfactory magneto-optical properties, as well as only low linear birefringence induced by stresses arising in the course of their manufacturing.
10
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Optical Sensor of the Magnetic Field in Electrical Power Engineering

45%
Barczak K., Pustelny T., Zycki Z., Blazejczyk T., Dorosz D.
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issue 6
1090-1092
EN
The authors of the presented paper deal with investigations concerning applications of the optical fiber sensor of the magnetic field in electric DC engines with permanent magnets. The aim of the sensor is to measure the state of magnetization of permanent magnets (basing on the measurements of magnetic field induction). The knowledge of the state of magnetization helps to decide whether permanent magnets need to be additionally magnetized in order to prevent damages of the whole engine. This can be done automatically, even when the engine is running. For the purpose the Faraday magnetooptic effect is used. The presented investigations concern an optical fiber sensor of the magnetic field provided with a glass rod characterized a high value of the Verdet constant as the sensing element. Thanks to the application of optical fibers the connection of the sensor head with the whole measuring system is constructed of insulating material without using of electrical connections.
11
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Fluoride concentration in teeth of the roe deer (Capreolus capreolus) and red deer (Cervus elaphus) from areas of Poland industrially uncontaminated with fluoride compounds

37%
Palczewska-Komsa M., Barczak K., Grocholewicz K., Buczkowska-Radlińska J., Piotrowski P. R., Sobolewska E., Palczewska-Komsa M., Barczak K., Grocholewicz K., Buczkowska-Radlińska J., Piotrowski P. R., Sobolewska E.
Polish Journal of Veterinary Sciences
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2021
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vol. 24
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issue 1
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