Wyniki wyszukiwania - BazTech

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Światłowodowy demodulator fazy : model i wyniki eksperymentalne

Hołdyński Z., Merta I., Jaroszewicz L. R., Świłło R.

Elektronika : konstrukcje, technologie, zastosowania

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2012

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Vol. 53, nr 11

46-47

PL

W pracy przedstawiono model i wyniki badań interferencyjnego światłowodowego demodulatora fazy w układzie interferometru Younga z dwuelementowym fotodetektorem w płaszczyźnie Fouriera. Oszacowano błąd metody pomiaru fazy i podano warunek jego minimalizacji w powiązaniu z parametrami geometrycznymi demodulatora pokazano związek odległości między fotodetektorami z liniowością światłowodowego demodulatora fazy. Wyniki eksperymentalne pozostają w wysokim stopniu korelacji z przyjętym modelem demodulatora fazy.

EN

In work we present fibre optics phase demodulator modeling and experimental results based on Young interferometrie configuration with bicell photodetector in Fourier focal plane. We experimentally estimated measurements' method errors and explained minimum condition of errors because of their directly connection with demodulator geometric parameters. We explained influence of gap size between photodetectors on linearization condition of phase demodulator. Experimental results are in high correlation with described model of phase demodulator.

2

Influence of tapering process on changes of optical fiber refractive index distribution along a structure

Stasiewicz K. A., Krajewski R., Jaroszewicz L. R., Kujawińska M., Świłło R.

Opto-Electronics Review

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2010

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Vol. 18, No. 1

102-109

EN

Investigations of internal structure changes along an optical fiber during the manufacture of biconical taper have been described. Basing on the constant volume theory, classification of biconical structures manufactured on a special set-up is presented and discussed. The interferometric tomography method has been used for determination of 3D geometry and refractive index distribution in manufactured optical fiber tapers. The experiments provide detailed information on external (diameter of cladding) as well as internal (core diameter and refractive index profile) changes along the taper region. The results have been discussed in relation to the parameters of the manufacturing process.

3

Application of Fiber-Optic Sagnac Interferometer for Detection of Rotational Seismic Events

Jaroszewicz L., Krajewski Z., Świłło R.

Molecular and Quantum Acoustics

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2001

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Vol. 22

133-144

EN

A new area of fiber-optic Sagnac interferometer application is presented and discussed. The fiber-optic sensor described in the paperm in well-known classic FOG configuration, has been designed for a detection of the rotational seismic events. The basic system optimisation for a detection rotation only without cenversion for rotation ac give an advantage for this system in compare to other rotational seismometers, which calculate rotational events in indirect ways. The comparison of data from th described fiber-optic rotation seismometer and two antiparallel pendulum seismometers are also presented.

4

Sensing applications of fiber-optic Sagnac interferometer.

Jaroszewicz L., Kieżun A., Świłło R.

Optica Applicata

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1999

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Vol. 29, nr 1-2

139-162

EN

The various possible applications of the fiber-optic Sagnac interferometer as a sensor of physical fields are presented. The use of the Segnac interferometer as an optical gyroscope for an investigation of show-speed rotational platforms and a construction of distributed security system are described. The possibility of applying a modified system for measurement of nanometer vibrations and parameters of the in-ine fiber-optic polarizer, phase and polarisation modular are also presented. Finally, the usability of the Sagnac interferometer as a fiber-optic ellipsometer is described.

5

In-Line fiber-optic biconical taper polarizer.

Kieżun A., Jaroszewicz L., Świłło R.

Optica Applicata

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1999

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Vol. 29, nr 1-2

163-169

EN

The construction of the in-line fiber-optic polarizer is presented. This element based on the biconical taper structure is positioned on a metal layer. the four-layer planar structure has been used for theoretical investigation of polarizer action. The theoretical results have been compared with experimental investigation of manufactured elements. The technological set-up for the polarizer preparation is also shown. The polarizers have been made for 0.33 and 1.300 mm wavelenghths. The first of them has a typical extinction ratio of 25dB with an attenuation of guided mode of 3dB. The second one has typical extinction ratio of 30 dB or more, with an attenuation of the desired polarisation of about 2 dB.