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Publications (10 of 28) Show all publications
Lindblom, M., Patzauer, M., Vogt, U., Wilbur, S., Safari Yazd, N., Hey Tow, K., . . . Ebenhag, S.-C. (2023). Flexible Liquid-Filled Scintillating Fibers for X-Ray Detection. In: 2023 IEEE SENSORS: . Paper presented at 2023 IEEE SENSORS.29 October 2023 - 01 November 2023. Vienna, Austria.. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Flexible Liquid-Filled Scintillating Fibers for X-Ray Detection
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2023 (English)In: 2023 IEEE SENSORS, Institute of Electrical and Electronics Engineers (IEEE), 2023Conference paper, Published paper (Refereed)
Abstract [en]

We present the design and fabrication of flexible, liquid-filled scintillating fibers for X-ray detection made from silica fibers and silica capillaries. The scintillating fibers were characterized using ultraviolet light exposure and we also performed an experiment demonstrating X-ray detection.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2023
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:ri:diva-68522 (URN)10.1109/SENSORS56945.2023.10325072 (DOI)
Conference
2023 IEEE SENSORS.29 October 2023 - 01 November 2023. Vienna, Austria.
Note

This project has received funding from the European Union's Horizon 2020 Research and Innovation Program under Grant Agreement No. 899634.

Available from: 2023-12-13 Created: 2023-12-13 Last updated: 2024-04-03Bibliographically approved
Hey Tow, K., Alomari, S., Claesson, Å. & Neves, T. (2023). Nanocomposite-coated optical fibres for improved distributed sensing performance in harsh environment. In: Proceedings - 28th International Conference on Optical Fiber Sensors, OFS 2023: . Paper presented at 28th International Conference on Optical Fiber Sensors, OFS 2023. Optical Society of America
Open this publication in new window or tab >>Nanocomposite-coated optical fibres for improved distributed sensing performance in harsh environment
2023 (English)In: Proceedings - 28th International Conference on Optical Fiber Sensors, OFS 2023, Optical Society of America , 2023Conference paper, Published paper (Refereed)
Abstract [en]

Draw tower fabrication of a novel optical fibre with nanocomposite polymer coating is reported. Preliminary results show it is more robust to high-temperature ageing, and moisture-induced strain than standard polymer fibres when used for distributed sensing. 

Place, publisher, year, edition, pages
Optical Society of America, 2023
Keywords
Optical fibers; Plastic coatings; %moisture; Coated optical fibers; Distributed sensing; Harsh environment; High-temperature ageing; Induced strain; Nanocomposite polymers; Polymer Coating; Polymer fiber; Sensing performance; Nanocomposites
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-73255 (URN)10.1364/OFS.2023.Th5.3 (DOI)2-s2.0-85192215788 (Scopus ID)
Conference
28th International Conference on Optical Fiber Sensors, OFS 2023
Note

This work was supported (2021-05094) by Sweden's Strategic Innovation Programme for Graphene, SIO Grafen, funded by the national innovation agency Vinnova.

Available from: 2024-05-23 Created: 2024-05-23 Last updated: 2024-05-27Bibliographically approved
Lindblom, M., Patzauer, M., Hey Tow, K., Claesson, Å., Fogelberg, O., Jonsäter, T. & Warne, M. (2023). Refractory Lining Health Monitoring Based on Raman Optical Time Domain Reflectometry. In: Proceedings of SPIE - The International Society for Optical Engineering: . Paper presented at 2023 European Workshop on Optical Fibre Sensors, EWOFS 2023 Mons23. May 2023 through 26 May 2023. SPIE, 12643, Article ID 1264327.
Open this publication in new window or tab >>Refractory Lining Health Monitoring Based on Raman Optical Time Domain Reflectometry
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2023 (English)In: Proceedings of SPIE - The International Society for Optical Engineering, SPIE , 2023, Vol. 12643, article id 1264327Conference paper, Published paper (Refereed)
Abstract [en]

A fiber optic health-monitoring system for refractory lining in steel-making processes is presented. Its applicability as an early-warning system for lining damage is demonstrated by the results obtained in a field trial, in which 240 m of fiber was embedded in the lining of an electric arc furnace. The system is based on Raman distributed sensing and polyimide coated fibers in metal tube. The results presented from temperature cycling and calibration at temperatures up to 600 °C show that adequate accuracy and stability for the application can be attained.

Place, publisher, year, edition, pages
SPIE, 2023
Keywords
fiber optics for harsh environments, high-temperature fiber-optic sensing, Raman distributed temperature sensing, refractory lining monitoring, Electric arcs, Electric furnaces, Fiber optic sensors, Linings, Refractory materials, Steel fibers, Steelmaking, Steelmaking furnaces, Temperature sensors, Distributed temperature sensing, Fiber optic for harsh environment, Fiber-optic sensing, Fiber-optics, Harsh environment, High-temperature fibers, Refractory lining, Fiber optics
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:ri:diva-65743 (URN)10.1117/12.2679296 (DOI)2-s2.0-85163042599 (Scopus ID)9781510665002 (ISBN)
Conference
2023 European Workshop on Optical Fibre Sensors, EWOFS 2023 Mons23. May 2023 through 26 May 2023
Note

The authors would like to acknowledge Vinnova, Sweden's innovation agency, and the Strategic innovation programme for process industrial IT and automation, for their financial support.

Available from: 2023-08-10 Created: 2023-08-10 Last updated: 2023-10-31Bibliographically approved
Claesson, Å., Franciscangelis, C., Pereira, J., Weldehawariat, T. & Hey Tow, K. (2022). FBG Applications in 25um Diameter Fibers. In: Optics InfoBase Conference Papers: . Paper presented at Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials, BGPP 2022, 24 July 2022 through 28 July 2022. Optica Publishing Group (formerly OSA)
Open this publication in new window or tab >>FBG Applications in 25um Diameter Fibers
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2022 (English)In: Optics InfoBase Conference Papers, Optica Publishing Group (formerly OSA) , 2022Conference paper, Published paper (Refereed)
Abstract [en]

Ultrathin 25μm optical fibers with FBG sensors are manufactured and used as vibration sensors in glass-fiber reinforced composites. The use of ultrathin fibers is discussed, and their manufacture is described. © 2022 The Authors.

Place, publisher, year, edition, pages
Optica Publishing Group (formerly OSA), 2022
Keywords
Fiber reinforced plastics, FBG sensor, Glass-fibre reinforced composites, Ultra-thin, Vibration sensors, Fiber Bragg gratings
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:ri:diva-62616 (URN)2-s2.0-85144238430 (Scopus ID)9781557528209 (ISBN)
Conference
Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials, BGPP 2022, 24 July 2022 through 28 July 2022
Available from: 2023-01-24 Created: 2023-01-24 Last updated: 2023-10-31Bibliographically approved
Leyssner, F., Myumyun, E., Meijer, E., Knoppers, R., Daugherty, T., Stoker, A., . . . Nieuwland, R. (2022). fs-IR laser point-by-point inscription of Fiber Bragg Gratings for a new generation of miniature sensors using novel 25μm diameter optical fibers. In: Optics InfoBase Conference Papers: . Paper presented at 27th International Conference on Optical Fiber Sensors, OFS 2022, 29 August 2022 through 2 September 2022. Optica Publishing Group (formerly OSA)
Open this publication in new window or tab >>fs-IR laser point-by-point inscription of Fiber Bragg Gratings for a new generation of miniature sensors using novel 25μm diameter optical fibers
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2022 (English)In: Optics InfoBase Conference Papers, Optica Publishing Group (formerly OSA) , 2022Conference paper, Published paper (Refereed)
Abstract [en]

fs-point-by-point through the coating written FBGs as a basis for novel sensor concepts using 25μm optical fiber. fs-point-by-point FBGs in novel single mode fiber with a cladding diameter of 25μm have been produced in fiber that is 5 times smaller than conventional telecommunication optical fiber. The development opens the path to new sensor types including miniature pressure sensors with a diameter of only 330μm (1Fr.). © 2022 The Author(s).

Place, publisher, year, edition, pages
Optica Publishing Group (formerly OSA), 2022
Keywords
Fiber Bragg gratings, Cladding diameters, In-fiber, IR lasers, Laser point, Miniature sensors, Sensor concepts, Single-mode fibers, Single mode fibers
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:ri:diva-64008 (URN)10.1364/OFS.2022.W4.54 (DOI)2-s2.0-85146688865 (Scopus ID)9781557528209 (ISBN)
Conference
27th International Conference on Optical Fiber Sensors, OFS 2022, 29 August 2022 through 2 September 2022
Available from: 2023-02-22 Created: 2023-02-22 Last updated: 2023-06-08Bibliographically approved
Pereira, J., Tarasenko, O., Claesson, Å., Laurell, F. & Margulis, W. (2022). Optical poling by means of electrical corona discharge. Optics Express, 30(12), 20605-20613
Open this publication in new window or tab >>Optical poling by means of electrical corona discharge
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2022 (English)In: Optics Express, E-ISSN 1094-4087, Vol. 30, no 12, p. 20605-20613Article in journal (Refereed) Published
Abstract [en]

Electrical corona discharge is employed in this work to deposit ions on the surface of an optical fiber, creating a strong electric field that is used for poling. Green laser light propagating in the core frees photocarriers that are displaced by the poling field. The technique presented can induce a higher optical nonlinearity than previously obtained in traditional optical poling with internal metal electrodes. To date, a maximum second order nonlinearity 0.13 pm/V has been achieved for a 15 kV corona discharge bias. 

Place, publisher, year, edition, pages
Optica Publishing Group (formerly OSA), 2022
Keywords
Nonlinear optics, Optical fibers, Corona discharges, Green laser light, High optical nonlinearities, Metal electrodes, Optical poling, Photo-carriers, Poling field, Second-order nonlinearity, Strong electric fields, Electric corona
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:ri:diva-59326 (URN)10.1364/OE.458459 (DOI)2-s2.0-85131262162 (Scopus ID)
Note

Funding details: Office of Naval Research Global, ONRG, N62909-20-1-2033; Funding details: Vetenskapsrådet, VR; Funding text 1: Horizon 2020 Framework Programme (ITN-FINESSE 722509); Marcus och Amalia Wallenbergs minnesfond; Vetenskapsrådet; Office of Naval Research Global (N62909-20-1-2033). The authors thank Åsa Claesson, Håkan Olsson, Mats Erikson and the Fiberlab group for the fibers used in the work.

Available from: 2022-06-20 Created: 2022-06-20 Last updated: 2023-06-08Bibliographically approved
Pereira, J., Claesson, Å., Laurell, F., Tarasenko, O. & Margulis, W. (2021). Poling optical fibers with electrical corona discharge. In: Optics InfoBase Conference Papers: . Paper presented at 2021 European Conference on Lasers and Electro-Optics, CLEO/Europe 2021, 21 June 2021 through 25 June 2021. The Optical Society
Open this publication in new window or tab >>Poling optical fibers with electrical corona discharge
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2021 (English)In: Optics InfoBase Conference Papers, The Optical Society , 2021Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
The Optical Society, 2021
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:ri:diva-57354 (URN)2-s2.0-85120409101 (Scopus ID)9781557528209 (ISBN)
Conference
2021 European Conference on Lasers and Electro-Optics, CLEO/Europe 2021, 21 June 2021 through 25 June 2021
Note

Funding text 1: Financial support from FINESSE (H2020 Marie Sklodowska Curie n. 722509), K. A. Wallenberg Foundation and the Swedish Science Council is acknowledged.

Available from: 2021-12-29 Created: 2021-12-29 Last updated: 2023-06-08Bibliographically approved
Bai, X., Claesson, Å., Laronche, A., Liu, F., Hu, M. & Albert, J. (2021). Sensing applications of fiber Bragg gratings in single mode fibers with as-drawn 25 μm diameter cladding. Optics and Laser Technology, 144, Article ID 107451.
Open this publication in new window or tab >>Sensing applications of fiber Bragg gratings in single mode fibers with as-drawn 25 μm diameter cladding
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2021 (English)In: Optics and Laser Technology, ISSN 0030-3992, E-ISSN 1879-2545, Vol. 144, article id 107451Article in journal (Refereed) Published
Abstract [en]

The sensing properties of fiber Bragg gratings (FBG) inscribed in single mode fiber with a 5 μm diameter core and 25 μm diameter cladding are studied experimentally for temperature, strain, bending, and surrounding refractive index. Compared to normal single mode fiber, the diameter of this fiber is 5 times smaller and it stretches 14.5 times more at the same applied load. Therefore, it is much more flexible and stretchable, while maintaining excellent optical quality at wavelengths near 1550 nm. In addition to a core mode back reflection resonance, strong FBGs inscribed in this fiber show a relatively small number of narrow bandwidth (0.7 nm) cladding mode resonances separated in wavelength by 2.5–6 nm. This relatively coarse spectral comb can then be used to sense many different kinds of perturbations involving core and cladding modes. In particular, unlike cladding-mode based sensors made from tilted FBGs, all resonances are of the same azimuthal order as the core mode (i.e. HE1m). This feature makes these gratings particularly sensitive to bending which causes the appearance of new resonances and reduced amplitudes of the original ones, each by up to 10 dB/mm−1 of curvature. On the other hand, the temperature sensitivities of all modes are similar to that of standard fiber (around 11 pm/oC) while strain sensitivities are somewhat higher (1.6–1.7 pm/μstrain). The surrounding refractive index sensitivity is also increased (by a factor of 3) over normal fiber, mostly due to the increased modal dispersion of the modes of the thinner cladding. Furthermore, it is possible to serially multiplex different gratings at different wavelengths by interleaving their resonance combs and preserving each grating identity in the combined spectrum.

Place, publisher, year, edition, pages
Elsevier Ltd, 2021
Keywords
Fiber optics sensors, Fibre Bragg gratings, Sensing applications, Thin Fibers, Fiber Bragg gratings, Refractive index, Resonance, Single mode fibers, Applied loads, Cladding modes, Core modes, Fiber Bragg, Fibre-optic sensor, Properties of fiber, Sensing property, Single-mode fibers, Cladding (coating)
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:ri:diva-56673 (URN)10.1016/j.optlastec.2021.107451 (DOI)2-s2.0-85113313714 (Scopus ID)
Note

 Funding details: Natural Sciences and Engineering Research Council of Canada, NSERC, RGPIN-2019-06255; Funding details: Northwest University, NWU; Funding details: China Scholarship Council, CSC; Funding text 1: This work is supported by the NSERC RGPIN-2019-06255, China Scholarship Council (CSC), the Northwest University Postgraduate Innovative Talents Training Project (Nos.YZZ17092). We also would like to thank Tedros Weldehawariat at RISE for developing the process for making the thin single mode fiber.

Available from: 2021-10-18 Created: 2021-10-18 Last updated: 2023-06-08Bibliographically approved
Ahlgren, B., Claesson, Å., Honfi, D., Kardeby, V., Karoumi, R. & Leander, J. (2020). Digitaliseringens möjligheter och utmaningar inom förvaltning och underhållsplanering av broar: Förstudie.
Open this publication in new window or tab >>Digitaliseringens möjligheter och utmaningar inom förvaltning och underhållsplanering av broar: Förstudie
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2020 (Swedish)Report (Other academic)
Abstract [en]

Rapporten behandlar digitalisering – att införa ny digital teknik – i förvaltningsverksamheten av broar. Omfattningen är en förstudie med syftet att identifiera behovet av framtida forskning för en långsiktig utveckling av broförvaltningen. En grundläggande ansats var att en digitalisering ska minska behovet av kostsamma underhållsåtgärder men bibehålla en hög säkerhet för våra broar. Projektets mål var att samla information om digitala informationsmodeller som skapas under investeringsskedet, utvärdera överlämningen av digitala modeller till förvaltningsskedet, och värdera den eventuella nyttan med digital informationsinsamling för tillståndsbedömning och underhållsplanering. En viktig del av detta var beskrivningen av dagens förvaltningssystem och hur det skulle kunna utvecklas. Studierna har bedrivits genom en enkätundersökning med respondenter från konsultfirmor aktiva inom broprojektering, intervjuer med tekniska experter och litteratursökningar. Resultatet visar att projekteringen av broar idag huvudsakligen görs genom byggnads-informationsmodellering (BIM). Inriktningen är mot byggskedet där samordning och kommunikation bedöms vara de största nyttorna. Överlämningen till förvaltningen består dock av relationsritningar i formen av enkla ritningsfiler. Trots att Trafikverkets strategi för BIM beskriver att en informationsmodell bör leva kvar under hela brons livslängd, finns det tveksamheter huruvida en modell från projekteringen är lämplig som förvaltningsmodell. Istället lyfts andra metoder fram för att skapa en modell av det byggda utförandet. Till exempel optiska metoder för skanning och fotogrammetri. Förvaltningssystemen bör utvecklas med funktioner för att lagra och tillgängliggöra stora mängder digital information från sensorer maskinella inspektioner. Syftet är att minska osäkerheterna i det byggda utförandet och graden av nedbrytning, för att slutligen skapa ett bättre underlag för beslut om åtgärder. Ett framtida scenario är en digital tvilling som speglar den verkliga konstruktionen och uppdateras kontinuerligt genom sensordata. Gällande hårdvara för mätningar behöver sensorer och system utvecklas med avseende på energiförbrukning, energiskördning och underhållsåtgärder, t.ex. genom kombinationer av utbytbara komponenter med kort livslängd och andra delar med lång livslängd. Fiberoptiska sensorer visar på lovande egenskaper men utveckling behövs för att göra dem mer kostnadseffektiva i relation till konventionella sensorer.

Publisher
p. 50
Series
KTH Royal Institute of Technology ; TRITA-ABE-RPT-217
Keywords
Digitalisation, Bridge management, Digital Twin, Information modelling, BIM, Condition assessment, Digitalisering, broförvaltning, digital tvilling, informationsmodeller, tillståndsbedömning, Civil Engineering, Samhällsbyggnadsteknik
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:ri:diva-58960 (URN)
Available from: 2022-03-29 Created: 2022-03-29 Last updated: 2023-06-08Bibliographically approved
Claesson, Å., Lyckfeldt, O., Lindqvist, J., Kardeby, V., Lejon, E., Ulfberg, P., . . . Hosseini, S. (2019). lntegrated Optical Fiber Sensors in Additive Manufactured Metal Components for Smart Manufacturing Applications. In: Smart Systems Integration; 13th International Conference and Exhibition on Integration Issues of Miniaturized Systems: . Paper presented at Smart Systems Integration; 13th International Conference and Exhibition on Integration Issues of Miniaturized Systems.
Open this publication in new window or tab >>lntegrated Optical Fiber Sensors in Additive Manufactured Metal Components for Smart Manufacturing Applications
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2019 (English)In: Smart Systems Integration; 13th International Conference and Exhibition on Integration Issues of Miniaturized Systems, 2019Conference paper, Published paper (Refereed)
Abstract [en]

This work combines fiber optic sensors with additive manufacturing to enable integration of temperature and strain sensors in metal components. In this paper, we present a fiber optic sensor network integrated in press hardening tools to monitor the contact between the tool and the metal sheet during forming operation. The tools are manufactured through metal powder bed fusion using laser melting processes (PBF-SLM), after which the tools are prepared for sensor integration. A demonstrator press hardening tool with integrated fiber optic sensors was heated using an electric heat foil and the sensor measurements was compared to a thermal simulation model. The sensor technology is based on Fiber Bragg Gratings (FBGs), integrated at several positions along the optical fiber. FBGs are in-fiber sensors that are multiplexed. lt is possible to place hundreds of FBG sensors along one single fiber, thus allowing for quasidistributed sensing of temperature or strain. The optical fiber itself can be less than 100 micrometer in diameter, allowing for sensing at several points in a minimally invasive way, when integrated in a tool or component.

Keywords
Smart Systems Integration; 13th International Conference and Exhibition on Integration Issues of Miniaturized Systems
National Category
Nano Technology
Identifiers
urn:nbn:se:ri:diva-59997 (URN)
Conference
Smart Systems Integration; 13th International Conference and Exhibition on Integration Issues of Miniaturized Systems
Available from: 2022-08-26 Created: 2022-08-26 Last updated: 2023-06-08Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-0830-6226

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