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1
Publication available in full text mode
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First Experimentally Observed Self-Organized Parametric down Conversion in Optical Fibers

100%
Chmela P., Samek O., Minarčík M.
Acta Physica Polonica A
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2001
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vol. 99
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issue 1
125-134
EN
The theoretically predicted self-organized parametric down conversion (the amplification of fundamental radiation on account of the energy of second-harmonic radiation) in doped optical fibers was experimentally demonstrated for the first time and a weak permanent second-order susceptibility grating in the conditioned fiber was identified.
2
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The New Sensing Fibre for Application in Optical Fibre Current Sensor

80%
Barczak K., Pustelny T., Dorosz D., Dorosz J.
Acta Physica Polonica A
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2008
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vol. 114
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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.
3
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Light Propagation in Liquid Crystal Fiber Structures

80%
Nasiłowski T., Woliński T.
Acta Physica Polonica A
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2001
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vol. 99
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issue 1
193-200
EN
The paper analyzes the light propagation in anisotropic liquid crystal fiber structures in order to find the possibilities to apply them to control and switch the polarization state and modulate some parameters of the transmitted light. The long term goal and motivation of the authors was the suggestion to replace the light modulating liquid crystal cell by a new generation of liquid crystal waveguides as an all-fiber light modulator, as well as sensors for different environmental parameters.
4
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Polarization Properties of Liquid-Crystal Elliptical-Core Fibers

80%
Szymańska A., Woliński T.
Acta Physica Polonica A
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2001
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vol. 99
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issue 1
201-206
EN
Polarization properties of liquid-crystal core optical fibers have been investigated. The liquid-crystal fiber is characterized by elliptical anisotropic core with low birefringence liquid crystal introduced by capillary axis. The paper presents also initial experimental results of the liquid-crystal fiber in the polarimetric configuration subjected to the influence of selected perturbations.
5
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Beam Propagation Method for Liquid Crystal-Core Optical Fiber Waveguides

80%
Szymańska A., Woliński T.
Acta Physica Polonica A
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1999
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vol. 95
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issue 5
761-766
EN
Propagation effects in liquid crystal-core optical fiber waveguides were investigated and simulated by means of beam propagation method. Spatial propagation beam distribution for anisotropic liquid crystal fibers was defined by using BPM_CAD software package (courtesy of Optiwave Corporation). The field intensity was related to the refractive index of core at the liquid crystal fiber in two different waveguide configurations: planar and radial, whereas the number of the propagating modes was calculated. Numerical results were compared with some experimental data formerly obtained.
6
Content available remote

Equilibrium Mode Distribution and Steady State Distribution in Step-Index Glass Optical Fibers

80%
Savović S., Djordjevich A., Drljača B., Simović A.
Acta Physica Polonica A
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2009
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vol. 116
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issue 4
655-657
EN
Using the power flow equation, we have examined mode coupling in a step-index multimode glass optical fiber. As a result, the coupling length at which the equilibrium mode distribution is achieved and the length of fiber required for achieving the steady-state mode distribution are obtained. These lengths are much longer for glass fiber than they are for plastic optical fibers. Our results are in good agreement with experimental results reported earlier.
7
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Comparison of Methods for Calculating Coupling Length in Step-Index Optical Fibers

80%
Savović S., Djordjevich A., Drljača B., Kovačević M.
Acta Physica Polonica A
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2009
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vol. 116
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issue 4
652-654
EN
A recently reported function for calculation of the coupling length at which the equilibrium mode distribution is achieved in step-index plastic optical fibers is compared to a long established calculation method and to experimental findings. The recent function, while simpler to apply as it eliminates the need to numerically solve the power flow equation repeatedly for every case, is also more accurate for high numerical aperture (0.45 to 0.5) plastic optical fibers.
8
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Calculation of the Impulse Response of Step-Index Plastic Optical Fibers Using the Time-Dependent Power Flow Equation

80%
Drljača B., Savović S., Djordjevich A.
Acta Physica Polonica A
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2009
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vol. 116
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issue 4
658-660
EN
The analytical solution of the time-dependent power flow equation is employed to calculate impulse response in a step-index plastic optical fiber. Results are given at different fiber lengths and are shown to agree with those reported in the literature. Mode-dependent attenuation, modal dispersion and mode coupling in plastic optical fibers are known to affect fiber-optic power delivery, data transmission, and sensing systems.
9
Content available remote

Single Mode High Refractive Index Optical Fibres

80%
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.
10
Content available remote

Analysis of Light Propagation in Optical Fibers with a High Step Index

80%
Jung P., Karpierz M.
Acta Physica Polonica A
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2012
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vol. 122
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issue 5
829-832
EN
Simulation of light beam propagation in optical fiber with a high step index requires the use of complicated methods. One of the simplest and accurate method is presented in this paper. The possibility of use of beam propagation method with exact boundary conditions in light beam propagation in optical fibers is shown in this work. The comparison of this method with analytical solutions for planar waveguide and optical fiber confirms usefulness of it.
11
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Numerical Investigation of the Photonic-Crystal Fibres with Suspended Core

70%
Pustelny T., Grabka M.
Acta Physica Polonica A
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2009
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vol. 116
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issue 3
385-388
EN
The photonic-crystal fibre with a suspended core was analyzed in order to explain possibilities of its using in investigation of electrooptic and magnetooptic effects occurring in the molecules of gas passed into air holes in the fibre. As results from numerical analysis, even 20% of electromagnetic optical energy can be propagating in the area of the air holes. The obtained results indicate the possibility of scanning the electrooptic and magnetooptic effects in photonic-crystal fibres with a suspended core in the case of considerable diminishing of the core (even below 1 μm) or in the case of light applying with its larger wavelengths.
12
Content available remote

Experimental and Theoretical Study of Light Propagation in Suspended-Core Optical Fiber

70%
Grabka M., Wajnchold B., Pustelny S., Gawlik W., Skorupski K., Mergo P.
Acta Physica Polonica A
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2010
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vol. 118
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issue 6
1127-1132
EN
We analyze coupling and propagation of light through a suspended-core microstructured optical fiber. It is experimentally demonstrated that light-coupling efficiency and mode distribution strongly depend on relative position of the fiber's core and a light beam and light polarization. The experimental results are supported with numerical simulations. The developed numerical model confirmed all the observed dependences.
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