Wyniki wyszukiwania - BazTech

1

Multimode polymer optical fiber strain gauge based on speckle correlation

Varyshchuk V, Bobitski Y., Poisel H.

International Journal of Microelectronics and Computer Science

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2014

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Vol. 5, nr 3

111--115

EN

In this paper, we proposed an optical ﬁber strain gauge where the fiber elongation originates from a spatial change in a random intensity pattern which is measured through a correlation coefficient of two speckle image. The optical scheme and the operation principle of strain gauge based on multimode polymer optical fiber is investigated. The possibility of measuring of the relative strain by processing of speckle patterns at the exit face of multimode fiber is studied theoretically and experimentally. The algorithm of correlation processing of speckle pattern is developed too. The sensing technique presented in this paper is simple, effective and low-cost solutions to the problem of small strain monitoring. The proposed method can be used to structural health-monitoring of the elements of buildings and industrial objects.

2

Zastosowanie technik elastooptycznych w procesie kontroli stateczności zboczy

Chrost A., Czarnecki L., Krywult Ł., Schneider-Glotzl J.

Górnictwo i Geoinżynieria

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2009

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R. 33, z. 2

77-81

PL

W artykule zostały opisane możliwości zastosowania technik elastooptycznych do monitoringu dużych obiektów geotechnicznych. Opisano instalację prototypowej geomaty światłowodowej na osuwisku w KWB "Bełchatów" oraz przedstawiono wyniki pomiarów.

EN

The article discusses issues connected with possibilities of the use of photo-elasticity technology in large geotechnical objects. It describes the installation of the prototype geotextile with polymer optic fiber on the slope failure in Bełchatów open cast mine and it presents the results of measurements.

3

Reconfigurable optical multiplexer based on liquid crystals for polymer optical fiber networks

Lallana P. C., Vázquez C., Pena J. M. S., Vergaz R.

Opto-Electronics Review

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2006

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Vol. 14, No. 4

311-318

EN

In this work, different novel 3×1 multiplexer structures for being used in polymer optical fiber networks are proposed. Designs are compact, scalable, and of low consumption, capable of operating in a large wavelength range simultaneously 660, 850, and 1300 nm, due to the use of nematic liquid crystal cells. Light that comes from each input port is handled independently and eight operation modes are possible. Control electronics has been made using a programmable integrated circuit. Electronic system makes available the managing of the optical stage using a computer. An additional four optical sensors have been included for allowing the optical status checking. Finally, a polarization independent multiplexer has been implemented and tested. Insertion losses less than 4 dB and isolation better than 23 dB have been measured. In addition, 30-ms and 15-ms setup and rise times have been obtained. The proposed multiplexer can be used in any polymer optical fiber network, even in perfluorinated graded index one, and it can be specially useful in optical sensor networks, or in coarse wavelength division multiplexing networks.

4

Gradientowe polimerowe włókna optyczne

Żuchowska D., Tymińska-Malinowska A.

Czasopismo Techniczne. Mechanika

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2006

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R. 103, z. 6-M

537-540

PL

Omówiono metody otrzymywania i właściwości optyczne polimerowych włókien optycznych. Metodą międzyfazowej rodnikowej polimeryzacji żelowej metakrylanu metylu i metakrylanu metylu ze styrenem w obecności modyfikatorów (1-bromonaftalenu, benzoesanu benzylu lub fosforanu trikrezylu) otrzymano preformy z gradientowym rozkładem współczynnika załamania światła.

EN

Obtaining methods of polymer optical fibre and their optical properties were discussed. Gradient refractive index polymer optical fibre were obtained by interfacial gel polymerization of methyl methacrylate and copolymerization of methyl methacrylate and styrene with dopants (1-bromonaphthalene, benzyl benzoate, tricresyl phosphate).