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Publications (10 of 41) Show all publications
Del Rosso, T., Margulis, W., Fontana, J. & Carvalho, I. C. .. (2019). 10 - Plasmonics for the Characterization of Metal Organic Films and Nanoparticles. In: Metal Nanostructures for Photonics: (pp. 223-259). Elsevier
Open this publication in new window or tab >>10 - Plasmonics for the Characterization of Metal Organic Films and Nanoparticles
2019 (English)In: Metal Nanostructures for Photonics, Elsevier , 2019, p. 223-259Chapter in book (Other academic)
Abstract [en]

Here, we present an overview of the ellipsometric characterization of hybrid thin films and metal nanoparticles by surface plasmon resonance (SPR) spectroscopy, together with the dynamic control of the optical properties of the latter for applications in optoelectronic devices. A description of traditional techniques used for the determination of the thickness and refractive index of organic thin films deposited over the SPR planar sensing platforms is presented, with a discussion of the most recent applications in the ellipsometric characterization of thin film of metal nanoparticles and graphene layers. We conclude by describing recent results developing a dynamically tunable plasmonic pixel, where the electric-field-controlled alignment of gold nanorods in a colloidal suspension can enable optical switching at frequencies greater than megahertz.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Surface plasmon resonance spectroscopy, Organic thin films, Metal nanoparticles, Graphene, Liquid crystals, Plasmonics, Electric field, Alignment, Display, Electro-optical switching, Optical fibers
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-36357 (URN)
Available from: 2018-12-14 Created: 2018-12-14 Last updated: 2018-12-14Bibliographically approved
Magalhaes, R., Garcia-Ruiz, A., Martins, H., Pereira, J., Margulis, W., Martin-Lopez, S. & Gonzalez-Herraez, M. (2019). Fiber-based distributed bolometry. Optics Express, 27(4), 4317-4328
Open this publication in new window or tab >>Fiber-based distributed bolometry
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2019 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 27, no 4, p. 4317-4328Article in journal (Refereed) Published
Abstract [en]

Optical fibers are inherently designed to allow no interaction between the guided light and the surrounding optical radiation. Thus, very few optical fiber-based technologies exist in the field of optical radiation sensing. Accomplishing fully-distributed optical radiation sensing appears then as even more challenging since, on top of the lack of sensitivity explained above, we should add the need of addressing thousands of measurement points in a single, continuous optical cable. Nevertheless, it is clear that there exist a number of applications which could benefit from such a distributed sensing scheme, particularly if the sensitivity was sufficiently high to be able to measure correctly variations in optical radiation levels compatible with the earth surface. Distributed optical radiation sensing over large distances could be employed in applications such as Dynamic Line Rating (DLR), where it is known that solar radiation can be an important limiting factor in energy transmission through overhead power cables, and also in other applications such as thermo-solar energy. In this work, we present the proof-of-concept of the first distributed bolometer based on optical fiber technology and capable of detecting absolute changes of irradiance. The core idea of the system is the use of a special fiber coating with high emissivity (e.g., carbon coating or black paint). The high absorption of these coatings translates into a temperature change that can be read with sufficiently high sensitivity using phase-sensitive reflectometry. To demonstrate the concept, we interrogate distinct black-coated optical fibers using a chirped-pulse ÖOTDR, and we readily demonstrate the detection of light with resolutions in the order of 1% of the reference solar irradiance, offering a high-potential technology for integration in the aforementioned applications.

Keywords
Bolometers, Cables, Coatings, Optical fibers, Sensitivity analysis, Solar energy, Solar radiation, Textile fibers, Coated optical fibers, Distributed sensing, Dynamic line rating(DLR), Energy transmission, Fiber-based technology, Measurement points, Optical radiations, Temperature changes, Optical cables
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-38242 (URN)10.1364/OE.27.004317 (DOI)2-s2.0-85062047306 (Scopus ID)
Note

 Funding details: European Commission, EC, MSCA-ITN-ETN-722509; Funding text 1: H2020 European Research Council through project U FINE (307441); European Commission (MSCA-ITN-ETN-722509); DOMINO Water JPI project, under the WaterWorks2014 cofounded call by Horizon 2020 Framework Programme (European Union) and Ministerio de Economia y Competitividad, Spain; Ministerio de Economía y Competitividad, Spain (TEC2015-71127-C2-2-R, "Ramón y Cajal" contract); Sensores e INstrumentación en tecnologías FOTÓNicas (S2013/MIT-2790).

Available from: 2019-03-29 Created: 2019-03-29 Last updated: 2019-03-29Bibliographically approved
Garcia-Ruiz, A., Martins, H., Magalhães, R., Pereira, J., Tarasenko, O., Norin, L., . . . Gonzalez-Herraez, M. (2019). Hermetic carbon coatings for electro-thermal all-fiber phase modulators. Journal of Lightwave Technology
Open this publication in new window or tab >>Hermetic carbon coatings for electro-thermal all-fiber phase modulators
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2019 (English)In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213Article in journal (Refereed) Epub ahead of print
Abstract [en]

Joule effect and thermal response of several carbon coated fibers are modelled and analysed. An electro thermally driven all-fiber phase modulator based on these principles is proposed and a proof of concept of it is characterized. This kind of fibers could be the basis for developing all fiber components aimed to operate in environments where the strength increase and impermeability to hydrogen diffusion guaranteed by the carbon coating is crucial.

Keywords
Carbon, Electrothermal effects, Optical fiber protective covering, Optical time domain reflectometry, Phase modulation, Rayleigh scattering
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-38592 (URN)10.1109/JLT.2019.2911426 (DOI)
Available from: 2019-05-09 Created: 2019-05-09 Last updated: 2019-05-09Bibliographically approved
Pereira, J., Camara, A., Laurell, F., Tarasenko, O. & Margulis, W. (2019). Linear electro-optical effect in silica fibers poled with ultraviolet lamp. Optics Express, 27(10), 14893-14902
Open this publication in new window or tab >>Linear electro-optical effect in silica fibers poled with ultraviolet lamp
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2019 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 27, no 10, p. 14893-14902Article in journal (Refereed) Published
Abstract [en]

A second-order nonlinearity was induced in silica fibers poled by exposure to ultraviolet (UV) radiation and simultaneous high voltage applied to internal electrodes. The UV light source was a tubular lamp with spectral peak at 254 nm. The highest second-order nonlinear coefficient measured through the linear electro-optic effect was 0.062 pm/V. The erasure of the recorded voltage with UV excitation was studied, and the stability of the poled fiber at a temperature exceeding ~400 K was investigated. By eliminating the use of a focused laser beam as excitation source, the technique enables poling many pieces of fiber in parallel.

Place, publisher, year, edition, pages
OSA - The Optical Society, 2019
Keywords
Electrooptical effects, Laser beams, Laser excitation, Light sources, Silica, Excitation sources, Focused laser beams, Internal electrodes, Linear electro-optic effect, Nonlinear coefficient, Second orders, Second-order nonlinearity, UV excitation, Fibers
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-38914 (URN)10.1364/OE.27.014893 (DOI)2-s2.0-85065813577 (Scopus ID)
Note

Funding details: Marianne and Marcus Wallenberg Foundation, 2016.0104; Funding details: 2015.04346; Funding text 1: H2020 ITN FINESSE. (722509), K. A. Wallenberg Foundation (2016.0104), the Swedish Research Concil (2015.04346).

Available from: 2019-06-03 Created: 2019-06-03 Last updated: 2019-06-03Bibliographically approved
Pereira, J., Camara, A., Laurell, F., Tarasenko, O. & Margulis, W. (2019). Poling optical fibers with UV lamp. In: Conference on Lasers and Electro-Optics OSA Technical Digest (Optical Society of America, 2019), paper SM2L.5: . Paper presented at CLEO: Science and Innovations 2019 San Jose, California United States 5–10 May 2019. OSA - The Optical Society, Article ID SM2L.5.
Open this publication in new window or tab >>Poling optical fibers with UV lamp
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2019 (English)In: Conference on Lasers and Electro-Optics OSA Technical Digest (Optical Society of America, 2019), paper SM2L.5, OSA - The Optical Society , 2019, article id SM2L.5Conference paper, Published paper (Refereed)
Abstract [en]

Silicate fibers with internal electrodes are optically poled without a laser by side-exposure to radiation from a UV tubular lamp. Electrooptic coefficients χ(2) ~ 0.04 pm/V and Vπ = 810 V are obtained.

Place, publisher, year, edition, pages
OSA - The Optical Society, 2019
Keywords
Optical fibers, Electro optic coefficient, Internal electrodes, Silicate fibers, Silicates
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-39379 (URN)10.1364/CLEO_SI.2019.SM2L.5 (DOI)2-s2.0-85068138254 (Scopus ID)9781557528209 (ISBN)
Conference
CLEO: Science and Innovations 2019 San Jose, California United States 5–10 May 2019
Note

Conference code: 141098; Export Date: 8 July 2019; Conference Paper; Funding details: Horizon 2020, 722509; Funding text 1: The authors acknowledge financial support from the FINESSE project. FINESSE is funded by the European Union's Horizon 2020 research and innovation programme under the Marie Slodowska - Curie grant agreement n° 722509. Partial funding from K. A. Wallenberg Foundation and the Swedish Science Council is gratefully acknowledged. We also thank Prof. I. C. S. Carvalho (PUC-Rio, Brazil) for useful discussions.

Available from: 2019-07-08 Created: 2019-07-08 Last updated: 2019-07-08Bibliographically approved
Pereira, J. M., Camara, A. R., Laurell, F., Tarasenko, O. & Margulis, W. (2019). Poling Optical Fibers with UV Lamp. In: 2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings: . Paper presented at 2019 Conference on Lasers and Electro-Optics, CLEO 2019, 5 May 2019 through 10 May 2019. Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>Poling Optical Fibers with UV Lamp
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2019 (English)In: 2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2019Conference paper, Published paper (Refereed)
Abstract [en]

Silicate fibers with internal electrodes are optically poled without a laser by side-exposure to radiation from a UV tubular lamp. Electrooptic coefficients κ(2)∼ 0.04 pm/V and Vπ = 810 V are obtained

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2019
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-39665 (URN)10.23919/CLEO.2019.8750132 (DOI)2-s2.0-85069214949 (Scopus ID)9781943580576 (ISBN)
Conference
2019 Conference on Lasers and Electro-Optics, CLEO 2019, 5 May 2019 through 10 May 2019
Note

Funding details: 722509; Funding text 1: The authors acknowledge financial support from the FINESSE project. FINESSE is funded by the European Union’s Horizon 2020 research and innovation programme under the Marie Slodowska - Curie grant agreement n° 722509. Partial funding from K. A. Wallenberg Foundation and the Swedish Science Council is gratefully acknowledged. We also thank Prof. I. C. S. Carvalho (PUC-Rio, Brazil) for useful discussions.

Available from: 2019-08-07 Created: 2019-08-07 Last updated: 2019-08-07Bibliographically approved
Yang, X., Lindberg, R., Margulis, W., Fröjdh, K. & Laurell, F. (2019). Rapid and continuously tunable narrow linewidth fiber source based on a SOA and a linearly chirped fiber Bragg grating. In: Conference on Lasers and Electro-Optics OSA Technical Digest (Optical Society of America, 2019), paper SM1L.5: . Paper presented at CLEO: Science and Innovations 2019 San Jose, California United States 5–10 May 2019. OSA - The Optical Society, Article ID SM1L.5.
Open this publication in new window or tab >>Rapid and continuously tunable narrow linewidth fiber source based on a SOA and a linearly chirped fiber Bragg grating
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2019 (English)In: Conference on Lasers and Electro-Optics OSA Technical Digest (Optical Society of America, 2019), paper SM1L.5, OSA - The Optical Society , 2019, article id SM1L.5Conference paper, Published paper (Refereed)
Abstract [en]

We demonstrate a tunable narrow-linewidth laser based on a semiconductor optical amplifier and a linearly chirped FBG. High tuning resolution and small power variation over 40 nm tuning range were achieved by optimizing the drive current.

Place, publisher, year, edition, pages
OSA - The Optical Society, 2019
Keywords
Semiconductor optical amplifiers, Drive currents, Fiber sources, High tuning resolutions, Linearly chirped fiber Bragg gratings, Narrow linewidth lasers, Narrow-line width, Power variations, Tuning ranges, Fiber Bragg gratings
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-39378 (URN)10.1364/CLEO_SI.2019.SM1L.5 (DOI)2-s2.0-85068143383 (Scopus ID)9781557528209 (ISBN)
Conference
CLEO: Science and Innovations 2019 San Jose, California United States 5–10 May 2019
Available from: 2019-07-08 Created: 2019-07-08 Last updated: 2019-07-08Bibliographically approved
Magalhães, R., Garcia-Ruiz, A., Martins, H., Pereira, J., Margulis, W., Martin-Lopez, S. & González-Herráez, M. (2018). Distributed detection of optical radiation using chirped-pulse phase-sensitive optical time domain reflectometry. In: Optics InfoBase Conference Papers: . Paper presented at Optical Fiber Sensors, OFS 2018, 24 September 2018 through 28 September 2018.
Open this publication in new window or tab >>Distributed detection of optical radiation using chirped-pulse phase-sensitive optical time domain reflectometry
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2018 (English)In: Optics InfoBase Conference Papers, 2018Conference paper, Published paper (Refereed)
Abstract [en]

A distributed bolometer operating over transparent-coated and carbon-coated optical fibers is proposed. The detection of light with irradiance sensitivities of in the order of 1% of the reference solar irradiance is readily demonstrated. 

Keywords
Fiber optic sensors, Carbon coated optical fibers, Chirped pulse, Distributed detection, Optical radiations, Optical time domain reflectometry, Solar irradiances, Optical fibers
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-37057 (URN)10.1364/ofs.2018.the13 (DOI)2-s2.0-85059471058 (Scopus ID)9781557528209 (ISBN)
Conference
Optical Fiber Sensors, OFS 2018, 24 September 2018 through 28 September 2018
Available from: 2019-01-21 Created: 2019-01-21 Last updated: 2019-08-08Bibliographically approved
Garcia-Ruiz, A., Martins, H., Magalhães, R., Pereira, J., Tarasenko, O., Norin, L., . . . Gonzalez-Herraez, M. (2018). Hermetic all-fiber phase modulators using Joule heating in carbon-coated fibers. In: Optics InfoBase Conference Papers: . Paper presented at Optical Fiber Sensors, OFS 2018, 24 September 2018 through 28 September 2018.
Open this publication in new window or tab >>Hermetic all-fiber phase modulators using Joule heating in carbon-coated fibers
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2018 (English)In: Optics InfoBase Conference Papers, 2018Conference paper, Published paper (Refereed)
Abstract [en]

Certain applications of fiber sensors (e.g. avionics, oil industry) imply extreme operating conditions spurring the development of hermetic all-fiber devices. We present a hermetic all-fiber phase modulator based on Joule heating in a carbon-coated fiber. 

Keywords
Carbon, Fiber optic sensors, Joule heating, Modulators, Phase modulation, A-carbon, All fiber, All-fiber devices, Carbon-coated, Fiber Sensor, Oil industries, Operating condition, Phase modulator, Optical fibers
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-37037 (URN)10.1364/ofs.2018.wd4 (DOI)2-s2.0-85059445198 (Scopus ID)9781557528209 (ISBN)
Conference
Optical Fiber Sensors, OFS 2018, 24 September 2018 through 28 September 2018
Available from: 2019-01-21 Created: 2019-01-21 Last updated: 2019-08-15Bibliographically approved
Margulis, W. (2018). Integration of optoelectronics into fibres enhances textiles. Nature, 560(7717), 170-171
Open this publication in new window or tab >>Integration of optoelectronics into fibres enhances textiles
2018 (English)In: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 560, no 7717, p. 170-171Article in journal (Other academic) Published
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-37598 (URN)10.1038/d41586-018-05873-9 (DOI)2-s2.0-85059798578 (Scopus ID)
Available from: 2019-01-28 Created: 2019-01-28 Last updated: 2019-01-29Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-8058-2140

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