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1

Flex Fatigue Behavior Of Plastic Optical Fibers With Low Bending Cycles

Huang J., Křemenáková D., Militký J.

Autex Research Journal

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2015

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Vol. 15, no. 2

112--115

EN

Flex fatigue behaviour of plastic optical fibres (POFs) with the diameters of 0.2 and 0.3 mm under different pretensions is measured with fatigue life curve by flexometer. The fatigue sensitivity coefficient is calculated by the linear fitting curve of normalised stress versus logarithm of bending cycles. The residual modulus is investigated during the flex fatigue processes. The results exhibit the exponential relationship between applied pretension and numbers of bending cycles at break. It is indicated that the flex fatigue of POFs might be sensitive with high swing angle or swing speed. There is an evident loss of modulus for two POFs with pretensions of 4 and 10% of ultimate tensile strength during 10-times bending cycles. The values of residual modulus of two POFs almost keep constant after 10-times bending cycles.

2

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.

3

Światłowody mPOF do zastosowań telekomunikacyjnych

Gdula P., Welikow K., Buczyński R., Szczepański P., Piramidowicz R.

Elektronika : konstrukcje, technologie, zastosowania

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2012

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Vol. 53, nr 11

29-32

PL

Niniejsza praca koncentruje się na wybranych zagadnieniach projektowania włókien mikrostrukturalnych POF (mPOF) o stosunkowo dużym rdzeniu, ograniczonej dyspersji modalnej oraz poprawionej odporności na straty zgięciowe, dyskutowanych w kontekście zastosowania w systemach FTTH.

EN

This following works is focused on selected issues of designing microstructured polymer optical fibers (mPOFs) with relatively large modal area, limited modal dispersion and improved bending losses discussed in the context of telecommunication applications.

4

Modelowanie parametrów propagacyjnych polimerowych światłowodów mikrostrukturaInych do zastosowań w sieciach FTTH

Gdula P., Welikow K., Szczepański P., Buczyński R., Piramidowicz R.

Elektronika : konstrukcje, technologie, zastosowania

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2011

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Vol. 52, nr 2

11-17

PL

W artykule skoncentrowano się na zagadnieniach projektowania i analizy parametrów polimerowych włókien mikrostrukturalnych przeznaczonych do zastosowania w sieciach dostępowych, a przede wszystkim w sieciach Fiber-To-The-Home (FTTH). Przeprowadzono porównanie aktualnie stosowanych rozwiązań w zakresie mediów transmisyjnych do sieci dostępowych i przedyskutowano możliwość zastosowania mikrostrukturyzacji w celu polepszenia parametrów transmisyjnych włókna polimerowego. Przeprowadzono symulacje parametrów propagacyjnych zaproponowanego rozwiązania, co pozwoliło na zaprojektowanie geometrii włókna zapewniającej ograniczenie liczby prowadzonych modów, pozwalając jednocześnie na utrzymanie stosunkowo dużego pola modowego i niskich strat zgięciowych.

EN

This paper is focused on issues of designing and modeling of main parameters of plastic optical fiber (POF) dedicated to application in optical access networks and, specifically, in Fiber-To-The-Home (FTTH) systems. The survey of state-of-the-art solutions have been done, and possibility of improving transmission properties of plastic optical fibers (POFs) by microstructurization have been discussed. As a result, we present the first results of our work on micro structured PMMA-based POF, which resulted in design of m-POF fiber with geometry supporting propagation of limited number of modes (or even single mode) and. simultaneously, keeping relatively large mode area. Moreover, the designed fiber is characterized by significantly lowered bending losses.

5

Światłowodowy czujnik przemieszczeń kątowych do rękawicy sensorycznej

Sankowska A., Krysztoforski K., Halusiak Ł., Jopek W.

Elektronika : konstrukcje, technologie, zastosowania

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2008

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Vol. 49, nr 6

59-62

PL

W pracy przedstawiono światłowodowy czujnik przemieszczeń kątowych m.in. przeznaczony do zastosowań w rękawicy sensorycznej sterującej pracą protezy ludzkiej ręki. Głowice pomiarowe czujnika wykonano z wielomodowego światłowodu polimerowego. W celu zwiększenia czułości pomiarowej głowicy światłowodowej wykonano nacięcia na zewnętrznej powierzchni światłowodu w kierunku prostopadłym do jego osi i zbadano ich wpływ na zmiany mocy optycznej w układzie pomiarowym.

EN

An angular displacement fiber sensor used in remote control of work of artificial hand is proposed and demonstrated. Measurement sensor head was made from multimode polymer optical fiber. With the aim to increase sensitivity of angular displacement sensor grooves were cut on the fiber surface and influence of physical perturbation of fiber on amplitude of transmitted light was investigated.

6

Światłowodowe tory równoległe

Wolczko A.

Elektronika : konstrukcje, technologie, zastosowania

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2007

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Vol. 48, nr 1

11-14

PL

Zastosowanie światłowodowych torów równoległych w szybkich transmisjach danych na krótkich dystansach może być rozwiązaniem tak technicznie jak i ekonomicznie korzystniejszym wobec wszystkich alternatywnych. Dostępność matryc laserów VCSEL umożliwia budowę prostych i tanich nadajników światłowodowych dla grubordzeniowych włókien szklanych lub polimerowych operujących na przepływnościach gigabitowych. Zaprezentowano podstawowe własności półprzewodnikowych laserów VCSEL w aspekcie aplikacji światłowodowych. Krótko, porównawczo z włóknami szklanymi, przedstawiono włókna polimerowe i obszary ich aplikacji. Tabelarycznie zestawiono handlowo dostępne moduły torów równoległych.

EN

Application of the parallel optical links for the fast short distance data transmissions may be technical and economical advantage versus any alternative solutions. VCSELs and VCSEL matrices accessible as electronic components makes possible the design of the simple, inexpensive fiber optic drivers for thick core glass or plastic fiber optic ribbons allowing gigabit transmission rates. The basic properties of the VCSELs in aspect of fiber optic applications are presented in the article. Plastic optical fibers comparatively to glass fibers are briefly described. The commercially accessible modules for the parallel links are grouped in the form of table.

7

Manufacturing methods for multi step index plastic optical fiber materials

Ferenets M., Myllymäki H., Grahn K., Sipilä A., Harlin A.

Autex Research Journal

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2004

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Vol. 4, no. 4

163--173

EN

Plastic optical fibres (POF) are often used in telecommunication, consumer electronics and automotive applications. Measuring and control devices used for POF are already standardised procedures. To meet the requirements of the IEEE 1394 standard for data transfer rates up to 800Mbps requires increasingly improved performance of POF. POFs which offer high bandwidth, total electromagnetic immunity and simple handling are considered as an alternative to noisy copper cables (cat 5) and high performance glass optic fibres for of a data highway. The market requires a simple and inexpensive alternative that would not be a technical overkill. The target of the study carried out in the Institute of Fibre Materials Science at Tampere University of Technology was to evaluate manufacturing methods which would allow this. This is a summary article of the results of manufacturing step index and multi-step index POF by preform manufacturing followed by fibre drawing as well as the extrusion method.

8

Development of polymeric optical fibre fabrics as illumination elements and textile displays

Harlin A., Mäkinen M., Vuorivirta A.

Autex Research Journal

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2003

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Vol. 3, no. 1

1--8

EN

Polymeric optical fibre (POF) is used for simple light guide and illumination applications. The polymer optical fibre materials can be utilised in flexible lighting elements which can be combined with textile structures. The POF woven fabrics are introduced as a flexible alternative to lighting elements. Various light-emitting woven fabric and light emission theories has been discussed. Simple poly-methyl-metacrylate PMMA and polycarbonate PC fibres have been produced experimentally through single-screw and conical extrusion. The fibre is integrated in woven structures by means of handloom, narrow fabric weaving and Jacquard technology. The manufacturing technology suitable for light- emitting textile applications and its opportunities in textile integration is discussed.

9

Polymeric optical fibres and future prospects in textile integration

Harlin A., Myllymäki H., Grahn K.

Autex Research Journal

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2002

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Vol. 2, no. 3

132--143

EN

In the era of wearable computing, intelligent systems are breaking the bounds of traditional textiles and their design. The integration of the technologies with clothing, accessories, upholstery, or industrial technical textiles provides higher user-comfort and enables their seamless use in everyday activities. Polymer optical fibre materials are suitable for short-distance data transfer and can be combined with textile structures. The manufacture of the fibre is low cost, and the products are more durable than glass optic fibres. Applications for POF today are known in the automotive industry, consumer electronics, cabling, and measuring as optodes. Polymeric optical fibre (POF) made of PMMA has been on the market for the past 25 years, used for simple light guide and data transmission application. Perfluor polymers (PF) offer great new opportunities in the field of data communication because of low absorption losses. Optical polycarbonate (PC), and polystyrene (PS) are used for special applications. The POF materials are introduced, and their opportunities in textile integration are discussed.