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  • 151.
    Djupsjöbacka, A
    RISE., Swedish ICT, Acreo.
    Impact of Polarization Controllers in Polarization-Mode Dispersion Emulators2002Ingår i: Journal of Optical Communication, Vol. 23, nr 5Artikel i tidskrift (Refereegranskat)
  • 152.
    Djupsjöbacka, A
    RISE., Swedish ICT, Acreo.
    On Differential Group-Delay Statistics for Polarization-Mode Dispersion Emulators2001Ingår i: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 19, nr 2, s. 285-Artikel i tidskrift (Refereegranskat)
  • 153.
    Djupsjöbacka, A
    et al.
    RISE., Swedish ICT, Acreo.
    Berntson, A
    RISE., Swedish ICT, Acreo.
    Mårtensson, J
    RISE., Swedish ICT, Acreo.
    A Method to Calculate PMD-Induced Eye-Opening Penalty Signal Outage for RZ-Modulated Signal Formats2008Ingår i: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 26, s. 3186-89Artikel i tidskrift (Refereegranskat)
  • 154.
    Djupsjöbacka, A
    et al.
    RISE., Swedish ICT, Acreo.
    Berntson, A
    RISE., Swedish ICT, Acreo.
    Mårtensson, J
    RISE., Swedish ICT, Acreo.
    Kllgren, D
    Measured Temporal statistics of the DGD RMS-Value in Buried Optical Fibers2009Ingår i: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 21, nr 24, s. 1801-1803Artikel i tidskrift (Refereegranskat)
  • 155.
    Djupsjöbacka, A
    et al.
    RISE., Swedish ICT, Acreo.
    Jacobsen, G
    RISE., Swedish ICT, Acreo.
    Tromborg, B
    Dynamic stimulated Brillouin scattering analysis2000Ingår i: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 18, s. 416-Artikel i tidskrift (Refereegranskat)
  • 156.
    Djupsjöbacka, A
    et al.
    RISE., Swedish ICT, Acreo.
    Mårtensson, J
    RISE., Swedish ICT, Acreo.
     Berntson, A
    RISE., Swedish ICT, Acreo.
    Åstlund, L
    Estimating Eye-opening Penalty with Aid of the Ripple Function of Fiber Bragg-gratings2007Ingår i: Journal of Optical Communications, Vol. 28, s. 91-95Artikel i tidskrift (Refereegranskat)
  • 157. dos Santos, A B
    et al.
    Jimenez, M R
    von der Weid, J P
    Djupsjöbacka, A
    RISE., Swedish ICT, Acreo.
    Statistical Measurements of BER Fluctuations Due to PMD in 10 Gb/s Optical Transmissions2002Ingår i: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 14, nr 7, s. 926-28Artikel i tidskrift (Refereegranskat)
  • 158. Drozin, L
    et al.
    Fonjallaz, P-Y
    RISE., Swedish ICT, Acreo.
    Stensland, L
    Long-period fibre gratings written by CO2 exposure of H2-loaded, standard fibres2000Ingår i: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 36, nr 8, s. 742-Artikel i tidskrift (Refereegranskat)
  • 159. Drummond, MV
    et al.
    Nogueira, RN
    Violasa, M
     Monteiro, PP
    Sterner, C
    RISE., Swedish ICT, Acreo.
    Fonjallaz, P-Y
    All-optical generation of 40 Gb/s single sidebsignals using a fiber Bragg grating2010Ingår i: Optics Communication, Vol. 283, nr 12Artikel i tidskrift (Refereegranskat)
  • 160.
    Du, Manxing
    et al.
    RISE., Swedish ICT, Acreo. Lund University, Sweden.
    Kihl, Maria
    Lund University, Sweden.
    Arvidsson, Åke
    Ericsson, Sweden; Kristianstad University, Sweden.
    Lagerstedt, Christina
    RISE., Swedish ICT, Acreo.
    Gavler, Anders
    RISE., Swedish ICT, Acreo.
    Analysis of prefetching schemes for TV-on-Demand service2015Ingår i: ICDT 2015: The Tenth International Conference on Digital Telecommunications / [ed] Tapio Saarelainen, 2015, s. 12-18Konferensbidrag (Refereegranskat)
    Abstract [en]

    TV-on-Demand service has become one of the most popular Internet applications that continuously attracts higher user interests. With rapidly increasing user demand, the existing network conditions may not be able to ensure low start-up delay of video playback. Prefetching has been broadly investigated to cope with the start-up latency problem which is also known as user perceived latency. In this paper, we analyse request patterns for TV programs from a popular Swedish TV service provider over 11 weeks. According to the analysis, we propose a prefetching scheme at the user end to preload videos before user requests. Our prefetching scheme significantly improves the cache hit ratio compared to terminal caching and we note that there is a potential to further improve prefetching performance by customizing prefetching schemes for different video categories. We further present a cost model to determine the optimal number of videos to prefetch. Finally, we discuss available time for prefetching and suggest that when to make prefetching decisions depends on the user demand patterns of different video categories.

  • 161.
    Duh, Emilija Stojmenova
    et al.
    University of Ljubljana, Slovenia.
    Papic, Marko
    University of Ljubljana, Slovenia.
    Kos, Andrej
    University of Ljubljana, Slovenia.
    Forzati, Marco
    RISE., Swedish ICT, Acreo.
    Cavenius, Håkan
    RISE., Swedish ICT, Acreo.
    Peckham, Clive
    Nièvre Numérique, France.
    Open innovation for delivering digital services with social and economic return on investment on the top of high speed broadband in rural Europe2016Ingår i: 2016 International Conference on Broadband Communications for Next Generation Networks and Multimedia Applications (CoBCom), 2016, artikel-id 7593509Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper presents a work in progress done within an Interreg Europe project called ERUDITE. The aim of the project is to create a process that enables regional stakeholders across Europe to co-identify and co-design appropriate and innovative digital services on the top of high speed broadband, based on existing needs and a recognition of the social, economic and environmental value that they have the potential to generate to society as a whole.

  • 162.
    Dörre , K
    RISE., Swedish ICT, Acreo.
    Techniques for single molecule sequencing1997Ingår i: Bioimaging, Vol. 5, nr 3Artikel i tidskrift (Refereegranskat)
  • 163.
    Eberbeck, D
    et al.
    RISE., Swedish ICT, Acreo, Sensor Systems.
    Petersson, K
    RISE., Swedish ICT, SICS, Imego.
    Astalan, AP
    RISE., Swedish ICT, SICS, Imego.
    Wiekhorst, F
    Bergemann, C
    Johansson, C
    RISE., Swedish ICT, SICS, Imego.
    Steinhoff, U
    Richter, H
    Krozer, A
    RISE., Swedish ICT, SICS, Imego.
    Thrams, L
    AC susceptometry and magnetorelaxometry for magnetic nanoparticle based biomolecule detection2009Ingår i: Vander Sloten J., Verdonck P., Nyssen M., Haueisen J. (eds) 4th European Conference of the International Federation for Medical and Biological Engineering. IFMBE Proceedings, vol 22. Springer, Berlin, Heidelberg, 2009, s. 2317-2321Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 164.
    Edberg, Jesper
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. Linköping University, Sweden.
    Brooke, Robert
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Granberg, Hjalmar
    RISE - Research Institutes of Sweden, Bioekonomi, Papperstillverkning och förpackningar.
    Engquist, Isak
    Linköping University, Sweden; Wallenberg Wood Science Center, Sweden.
    Berggren, Magnus
    Linköping University, Sweden; Wallenberg Wood Science Center, Sweden.
    Improving the Performance of Paper Supercapacitors Using Redox Molecules from Plants2019Ingår i: Advanced Sustainable SystemsArtikel i tidskrift (Refereegranskat)
    Abstract [en]

    A supercapacitor made from organic and nature‐based materials, such as conductive polymers (PEDOT:PSS), nanocellulose, and an the organic dye molecule (alizarin), is demonstrated. The dye molecule, which historically was extracted from the roots of the plant rubia tinctorum, is here responsible for the improvement in energy storage capacity, while the conductive polymer provides bulk charge transport within the composite electrode. The forest‐based nanocellulose component provides a mechanically strong and nonporous network onto which the conductive polymer self‐organizes. The electrical and electrochemical properties of the material composition are investigated and prototype redox‐enhanced supercapacitor devices with excellent specific capacitance exceeding 400 F g−1 and an operational stability over >1000 cycles are demonstrated. This new class of supercapacitors, which in part are based on organic materials from plants, represents an important step toward a green and sustainable energy technology.

  • 165.
    Edberg, Jesper
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. Linköping University, Sweden.
    Inganas, Olle
    Linköping University, Sweden.
    Engquist, Isak
    Linköping University, Sweden.
    Berggren, Magnus
    Linköping University, Sweden; Stellenbosch University, South Africa.
    Boosting the capacity of all-organic paper supercapacitors using wood derivatives2018Ingår i: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 6, nr 1, s. 145-152Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Printed and flexible organic electronics is a steadily expanding field of research and applications. One of the most attractive features of this technology is the possibility of large area and high throughput production to form low-cost electronics on different flexible substrates. With an increasing demand for sustainable energy production, low-cost and large volume technologies to store high-quality energy become equally important. These devices should be environmentally friendly with respect to their entire life cycle. Supercapacitors and batteries based on paper hold great promise for such applications due to the low cost and abundance of cellulose and other forest-derived components. We report a thick-film paper-supercapacitor system based on cellulose nanofibrils, the mixed ion-electron conducting polymer PEDOT: PSS and sulfonated lignin. We demonstrate that the introduction of sulfonated lignin into the cellulose-conducting polymer system increases the specific capacitance from 110 to 230 F g(-1) and the areal capacitance from 160 mF cm(-2) to 1 F cm(-2). By introducing lignosulfonate also into the electrolyte solution, equilibrium, with respect to the concentration of the redox molecule, was established between the electrode and the electrolyte, thus allowing us to perform beyond 700 charge/discharge cycles with no observed decrease in performance.

  • 166.
    Edström, Adam
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Målberg, Sofia
    RISE - Research Institutes of Sweden, ICT, Acreo.
    The Strategic Research Agenda for the Swedish Additive Metal Manufacturing Industry2018Övrigt (Övrig (populärvetenskap, debatt, mm))
  • 167. Ek, P
    et al.
    Schönberg, T
    RISE., Swedish ICT, Acreo.
    Sjödahl, J
    Jacksen, J
    Vieider, C
    Emmer, A
    Roeraade, J
    Electrospray ionization from an adjustable gap between two silicon chips2009Ingår i: J. of Mass Spectrometry, Vol. 44, s. 171-81Artikel i tidskrift (Refereegranskat)
  • 168.
    Elahipanah, H.
    et al.
    Ascatron AB, Sweden.
    Thierry-Jebali, N.
    Ascatron AB, Sweden.
    Reshanov, S. A.
    Ascatron AB, Sweden.
    Kaplan, W.
    Ascatron AB, Sweden.
    Zhang, A.
    Ascatron AB, Sweden.
    Lim, J. -K
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Bakowski, M.
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Östling, M.
    KTH Royal Institute of Technology, Sweden.
    Schöner, A.
    Ascatron AB, Sweden.
    Design optimization of a high temperature 1.2 kV 4H-SiC buried grid JBS rectifier2017Ingår i: 11th European Conference on Silicon Carbide and Related Materials, ECSCRM 2016, 2017, s. 455-458Konferensbidrag (Refereegranskat)
    Abstract [en]

    1.2 kV SiC buried grid junction barrier Schottky (BG-JBS) diodes are demonstrated. The design considerations for high temperature applications are investigated. The design is optimized in terms of doping concentration and thickness of the epilayers, as well as grid size and spacing dimensions, in order to obtain low on-resistance and reasonable leakage current even at high temperatures. The device behavior at temperatures ranging from 25 to 250ºC is analyzed and measured on wafer level. The forward voltage drop of 1.1 V at 100 A/cm2 and 3.8 V at 1000 A/cm2 is measured, respectively. At reverse voltage of 1 kV, a leakage current density below 0.1 μA/cm2 and below 0.1 mA/cm2 is measured at 25 and 250ºC, respectively. This proves the effective shielding effect of the BG-JBS design and provides benefits in high voltage applications, particularly for high temperature operation.

  • 169. Elderstig, H
    et al.
    Larsson, O
    RISE., Swedish ICT, Acreo.
    Polymeric MST - high precision at low cost1999Ingår i: Journal of Micromechanics and Microengineering, ISSN 0960-1317, E-ISSN 1361-6439, Vol. 7, nr 3Artikel i tidskrift (Refereegranskat)
  • 170.
    Elmquist, Lennart
    et al.
    RISE - Research Institutes of Sweden, Material och produktion, SWECAST.
    Carlsson, Raul
    RISE - Research Institutes of Sweden, Material och produktion, SWECAST.
    Johansson, Christer
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Cast iron components with intelligence2018Konferensbidrag (Refereegranskat)
    Abstract [en]

    The paper describes a project with the aim to develop communicating and functional cast iron components in smart systems. The concept is based on sensors integrated into cast iron components; this will influence not only the component but also the casting process. Among the technical challenges is how to choose a sensor solution that cost-efficiently and with minimal environmental impact can be integrated into the component during the casting process, and especially without being damaged during mold filling and the high pouring temperature. Another challenge is how the iron will interact and interfere with sensor signals and whether an insulating intermediate material is needed or not. Integrating the sensors into the casting makes sensors a natural part of the component, which in turn can lead to more resource efficient designs, increased value added for the casting sector, and a general access to different possibilities of digitalization. The integrated sensors can be used for effective control and monitoring of components when in service and give information about for example how the component is used and what conditions it is exposed to. In other words, the component can tell when maintenance is needed or in worst cases, indicate that something is wrong before a failure will happen. Important measurands can e.g. be elongation, shear, temperature and vibration. Different combinations of sensor materials and insulating materials and their interaction with the cast iron have been investigated. It is shown how the interaction at the interface affects the microstructure and consequently the properties of the cast iron. In the case of insulating materials it is e.g. shown how air gaps are formed and in the case of sensor materials it is shown how a diffusion zone is formed and how this zone depends on the sensor material. How this diffusion zone affects the microstructure is discussed.

  • 171.
    El-Taher, Atalla
    et al.
    Aston University, UK.
    Pang, Xiaodan
    RISE., Swedish ICT, Acreo.
    Schatz, Richard
    KTH Royal Institute of Technology, Sweden.
    Jacobsen, Gunnar
    RISE., Swedish ICT, Acreo.
    Popov, Sergei
    KTH Royal Institute of Technology, Sweden.
    Sergeyev, Sergey
    Aston University, UK.
    Noise characterization and transmission evaluation of unrepeated raman amplified DP-16QAM link2015Ingår i: 2015 Optical Fiber Communications Conference and Exhibition (OFC), 2015, artikel-id 7121640Konferensbidrag (Refereegranskat)
    Abstract [en]

    Impairments characterization and performance evaluation of Raman amplified unrepeated DP-16QAM transmissions are conducted. Experimental results indicate that small gain in forward direction enhance the system signal-to-noise ratio for longer reach without introducing noticeable penalty.

  • 172.
    Engelke, Ulrich
    et al.
    Commonwealth Scientific and Industrial Research Organisation, Australia.
    Darcy, Daniel P.
    Dolby Laboratories, USA.
    Mulliken, Grant H.
    Dolby Laboratories, USA.
    Bosse, Sebstian
    Fraunhofer Institute for Telecommunications, Germany.
    Martini, Maria G.
    Kingston University, UK.
    Arndt, Sebstian
    NTNU Norwegian University of Science and Technology, Norway.
    Antons, Jan Niklas
    Technische Universiät Berlin, Germany.
    Chan, Kit Y.
    Curtin University, Australia.
    Ramzan, Naeem
    University of the West of Scotland, UK.
    Brunnstrom, Kjell
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Psychophysiology-Based QoE Assessment: A Survey2017Ingår i: IEEE Journal on Selected Topics in Signal Processing, ISSN 1932-4553, E-ISSN 1941-0484, Vol. 11, nr 1, s. 6-21, artikel-id 7569001Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We present a survey of psychophysiology-based assessment for quality of experience (QoE) in advanced multimedia technologies. We provide a classification of methods relevant to QoE and describe related psychological processes, experimental design considerations, and signal analysis techniques. We summarize multimodal techniques and discuss several important aspects of psychophysiology-based QoE assessment, including the synergies with psychophysical assessment and the need for standardized experimental design. This survey is not considered to be exhaustive but serves as a guideline for those interested to further explore this emerging field of research.

  • 173. Engholm, M
    et al.
    Jelger, P
    Laurell, F
     Norin, L
    RISE., Swedish ICT, Acreo.
    Improved photodarkening resistivity in ytterbium-doped fiber lasers by cerium codoping2009Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 24, nr 8, s. 1285-Artikel i tidskrift (Refereegranskat)
  • 174. Engholm, M
    et al.
    Lashgari, K
    Edvarsson, S
    Westin, G
    Norin, L
    RISE., Swedish ICT, Acreo.
    Atomically designed precursors in optical fiber amplifiers: The thermal stability of the heterobimetallic ErAl3(OPri)12 in a solution-coated silica soot2005Ingår i: Journal of Applied Physics, Vol. 97, nr 11, s. 113104-Artikel i tidskrift (Refereegranskat)
  • 175. Engholm, M
    et al.
     Norin, L
    RISE., Swedish ICT, Acreo.
    Comment on: "Photodarkening in Yb-doped aluminosilicate fibers induced by 488 nm irradiation"2008Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 33, nr 11, s. 1216-Artikel i tidskrift (Refereegranskat)
  • 176. Engholm, M
    et al.
    Norin, L
    RISE., Swedish ICT, Acreo.
    Preventing photodarkening in ytterbium-doped high power fiber lasers, correlation to the UV-transparency of the core glass2008Ingår i: Optics Express, Vol. 16, s. 1260-68Artikel i tidskrift (Refereegranskat)
  • 177. Engholm, M
    et al.
     Norin, L
    RISE., Swedish ICT, Acreo.
    Strong UV-absorption visible luminescence in ytterbium-doped aluminosilicate glass under UV-excitation2007Ingår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 32, s. 3352-54Artikel i tidskrift (Refereegranskat)
  • 178. Engholm, M
    et al.
    Norin, L
    RISE., Swedish ICT, Acreo.
    Edvardsson, S
    Lashgari, K
    Westin, G
    A structural investigation of a synthesized precursor for optical fiber applications, the heterobimetallic ErNb2(OPri)132006Ingår i: Optical Materials, Vol. 29, nr 4, s. 386-91Artikel i tidskrift (Refereegranskat)
  • 179.
    Engholm, Magnus
    et al.
    Mid Sweden University, Sweden.
    Hammarling, Krister
    Mid Sweden University, Sweden.
    Andersson, Henrik
    Mid Sweden University, Sweden.
    Sandberg, Mats
    RISE - Research Institutes of Sweden, ICT, Acreo. Mid Sweden University, Sweden.
    Nilsson, Hans Erik
    Mid Sweden University, Sweden.
    A bio-compatible fiber optic pH sensor based on a thin core interferometric technique2019Ingår i: Photonics, ISSN 2304-6732, Vol. 6, nr 1, artikel-id 11Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    There is an increasing demand for compact, reliable and versatile sensor concepts for pH-level monitoring within several industrial, chemical as well as bio-medical applications. Many pH sensors concepts have been proposed, however, there is still a need for improved sensor solutions with respect to reliability, durability and miniaturization but also for multiparameter sensing. Here we present a conceptual verification, which includes theoretical simulations as well as experimental evaluation of a fiber optic pH-sensor based on a bio-compatible pH sensitive material not previously used in this context. The fiber optic sensor is based on a Mach-Zehnder interferometric technique, where the pH sensitive material is coated on a short, typically 20-25 mm thin core fiber spliced between two standard single mode fibers. The working principle of the sensor is simulated by using COMSOL Multiphysics. The simulations are used as a guideline for the construction of the sensors that have been experimentally evaluated in different liquids with pH ranging from 1.95 to 11.89. The results are promising, showing the potential for the development of bio-compatible fiber optic pH sensor with short response time, high sensitivity and broad measurement range. The developed sensor concept can find future use in many medical- or bio-chemical applications as well as in environmental monitoring of large areas. Challenges encountered during the sensor development due to variation in the design parameters are discussed. © 2019 by the authors.

  • 180.
    Ericson, C
    et al.
    RISE., Swedish ICT, Acreo.
    Holm, J
    RISE., Swedish ICT, Acreo.
    Ericson, T
    RISE., Swedish ICT, Acreo.
    Hjerten, S
    RISE., Swedish ICT, Acreo.
    Electroosmosis- Pressure-Driven Chromatography in Chips Using Continuous Beds2000Ingår i: Analytical Chemistry, Vol. 72, nr 1, s. 81-Artikel i tidskrift (Refereegranskat)
  • 181.
    Eriksson , P
    RISE., Swedish ICT, Acreo.
    Theoreticalexperimental investigation of interferometric absorbersfor thermal infrared detectors1999Ingår i: Sensor Materials, Vol. 9, nr 2Artikel i tidskrift (Refereegranskat)
  • 182.
    Eriksson , P
    RISE., Swedish ICT, Acreo.
    Thermal characterization of surface micromachined silicon nitride membranes for thermal infrared detectors1999Ingår i: Journal of Micromechanical Systems, Vol. 6, nr 1Artikel i tidskrift (Refereegranskat)
  • 183. Eriksson, T
    et al.
    Blomgren, J
    RISE., Swedish ICT, Acreo.
    Winkler, D
    An HTS SQUID picovoltmeter used as preamplifier for Rogowski coil sensors2002Ingår i: Physica, Vol. c358, s. 130-Artikel i tidskrift (Refereegranskat)
  • 184. Eriksson, T
    et al.
    Blomgren, J
    RISE., Swedish ICT, Acreo.
    Winkler, D
    Discharge measurements using a HTS-SQUID based amplifier system2001Ingår i: IEEE Trans. Appl. Supercond., Vol. 11, s. 256-Artikel i tidskrift (Refereegranskat)
  • 185.
    Erlandsson, Johan
    et al.
    KTH Royal Institute of Technology, Sweden.
    Lopez Duran, Verónica
    KTH Royal Institute of Technology, Sweden.
    Granberg, Hjalmar
    RISE., Innventia.
    Sandberg, Mats
    RISE., Swedish ICT, Acreo.
    Larsson, Per A.
    KTH Royal Institute of Technology, Sweden.
    Wågberg, Lars
    KTH Royal Institute of Technology, Sweden.
    Macro- and mesoporous nanocellulose beads for use in energy storage devices2016Ingår i: Applied Materials Today, ISSN 2352-9407, Vol. 5, s. 246-254Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Chemically cross-linked, wet-stable cellulose nanofibril (CNF) aerogel beads were fabricated using a novel procedure. The procedure facilitated controlled production of millimetre-sized CNF aerogel beads without freeze-drying or critical point drying, while still retaining a highly porous structure with low density. The aerogel beads were mechanically robust in the dry state, supporting loads of 1.3 N at 70% compression, even after being soaked in water and re-dried. Furthermore, they displayed both a good stability in water and a remarkably good shape recovery after wet compression. Owing to the stability in water, the entire surface of the highly porous aerogel beads could be successfully functionalized with polyelectrolytes and carboxyl-functionalized single-wall carbon nanotubes (CF-SWCNTs) using the Layer-by-Layer technique, introducing a significant electrical conductivity (1.6 mS/cm) to the aerogel beads. The functionalized, electrically conducting aerogel beads could carry as much as 2 kA/cm2 and act as electrodes in a supercapacitor displaying a stabilized charge storage capacity of 9.8 F/g after 50 charging–discharging cycles.

  • 186.
    Estarán, Jose
    et al.
    Nokia Bell Labs, France.
    Mardoyan, Haik
    Nokia Bell Labs, France.
    Jorge, Filipe
    Nokia Bell Labs, France.
    Ozolins, Oskars
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Udalcovs, Aleksejs
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Konczykowska, Agnieszka
    Nokia Bell Labs, France.
    Riet, Muriel
    Nokia Bell Labs, France.
    Duval, Bernadette
    Nokia Bell Labs, France.
    Nodjiadjim, Virginie
    Nokia Bell Labs, France.
    Dupuy, Jean Yves
    Nokia Bell Labs, France.
    Pang, Xiaodan
    KTH Royal Institute of Technology, Sweden.
    Westergren, Urban
    KTH Royal Institute of Technology, Sweden.
    Chen, Jiajia
    KTH Royal Institute of Technology, Sweden.
    Popov, Sergei
    KTH Royal Institute of Technology, Sweden.
    Bigo, Sebastien
    Nokia Bell Labs, France.
    140/180/204-Gbaud OOK Transceiver for Inter- and Intra-Data Center Connectivity2019Ingår i: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 37, nr 1, s. 178-187, artikel-id 8500133Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We report on an on-off keying intensity-modulation and direct-detection C-band optical transceiver capable of addressing all datacenter interconnect environments at well-beyond 100Gbaud. For this, the transmitter makes use of two key InP technologies: a 2:1 double heterojunction bipolar transistor selector multiplexer and a monolithically integrated distributed-feedback laser traveling-wave electro-absorption modulator, both exceeding 100-GHz of 3-dB analog bandwidth. A pre-amplified 110-GHz PIN photodiode prior to a 100-GHz analog-to-digital converter complete the ultra-high bandwidth transceiver module; the device under study. In the experimental work, which discriminates between intra- and inter-data center scenarios (dispersion unmanaged 120, 560, 960m; and dispersion-managed 10, and 80km of standard singlemode fiber), we evaluate the bit-error rate evolution against the received optical power at 140, 180, and 204Gbaud on-off keying for different equalization configurations (adaptive linear filter with and without the help of short-memory sequence estimation) and forward error correction schemes (hard-decision codes with 7% and 20% overhead); drawing conclusions from the observed system-level limitations of the respective environments at this ultra-high baudrate, as well as from the operation margins and sensitivity metrics. From the demonstration, we highlight three results: successful operation with >6-dB sensitivity margin below the 7% error-correction at 140Gbaud over the entire 100m-80km range with only linear feed-forward equalization. Then the transmission of a 180Gbaud on-off-keying carrier over 80km considering 20% error-correction overhead. And finally, 10-km communication at 204Gbaud on-off keying with up to 6dB sensitivity margin, and regular 7%-overhead error-correction.

  • 187.
    Estcheverry, Sebastián
    et al.
    RISE., Swedish ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Sudirman, Aziza
    Cobolt AB, Sweden.
    Laurell, Frederik
    KTH Royal Institute of Technology, Sweden.
    Margulis, Walter
    RISE., Swedish ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Playing cellular Golf in microstructured fibres2015Ingår i: Workshop on Specialty Optical Fibers and their Applications 2015, 2015, artikel-id WF1A.1Konferensbidrag (Refereegranskat)
    Abstract [en]

    We illuminate particles in a solution using fibers with cladding holes. Particles sufficiently near the fiber tip and with the correct optical signature are collected into the holes with good specificity, mimicking cell-collection for diagnostics.

  • 188. Esteve, R
    et al.
    Schöner, A
    RISE., Swedish ICT, Acreo.
      Reshanov, S A
     Zetterling, C-M  
    Comparative study of thermal oxides post-oxidized deposited oxides on n-type free standing 3C-SiC2010Ingår i: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 645-648, s. 829-32Artikel i tidskrift (Refereegranskat)
  • 189.
    Etcheverry, S.
    et al.
    KTH Royal Institute of Technology, Sweden.
    Faridi, A.
    KTH Royal Institute of Technology, Sweden.
    Ramachandraiah, H.
    KTH Royal Institute of Technology, Sweden.
    Margulis, Walter
    RISE., Swedish ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Laurell, F.
    KTH Royal Institute of Technology, Sweden.
    Russom, A.
    RISE., Swedish ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Optofludics in microstructured fibers combining particle elasto-inertial focusing and fluorescence2016Ingår i: 2016 Conference on Lasers and Electro-Optics (CLEO), 2016, artikel-id 7789265Konferensbidrag (Refereegranskat)
    Abstract [en]

    Optofluidics is exploited in an all-fiber component to detect and identify through fluorescence particles flowing at high rate and inertially focused in a capillary. The system represents a first step towards an in-fiber flow cytometer.

  • 190.
    Etcheverry, Sebastian
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Araujo, Leonardo F.
    PUC-RIO Pontifícia Universidade Católica do Rio de Janeiro, Brazil.
    Carvalho, Isabel C. S.
    PUC-RIO Pontifícia Universidade Católica do Rio de Janeiro, Brazil.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Fontana, Jake
    Naval Research Laboratory, USA.
    Digital electric field induced switching of plasmonic nanorods using an electro-optic fluid fiber2017Ingår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 111, nr 22, artikel-id 221108Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We demonstrate the digital electric field induced switching of plasmonic nanorods between "1" and "0" orthogonal aligned states using an electro-optic fluid fiber component. We show by digitally switching the nanorods that thermal rotational diffusion of the nanorods can be circumvented, demonstrating an approach to achieve submicrosecond switching times. We also show, from an initial unaligned state, that the nanorods can be aligned into the applied electric field direction in 110 ns. The high-speed digital switching of plasmonic nanorods integrated into an all-fiber optical component may provide opportunities for remote sensing and signaling applications. © 2017 Author(s).

  • 191.
    Etcheverry, Sebastian
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Araujo, Leonardo F.
    Pontifical Catholic University of Rio de Janeiro, Brazil.
    da Costa, Greice K. B.
    Rural Federal University of Rio de Janeiro, Brazil.
    Pereira, Joao M. B.
    Pontifical Catholic University of Rio de Janeiro, Brazil.
    Camara, Alexandre R.
    Rio de Janeiro State University, Brazil.
    Naciri, Jawad
    Naval Research Laboratory, USA.
    Ratna, Banahalli R.
    Naval Research Laboratory, USA.
    Hernández-Romano, Ivan
    University of Guanajuato, Mexico; Mackenzie Presbyterian University, Brazil.
    de Matos, Cristiano J. S.
    Mackenzie Presbyterian University, Brazil.
    Carvalho, Isabel C. S.
    Pontifical Catholic University of Rio de Janeiro, Brazil.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Fontana, Jake
    Naval Research Laboratory, USA.
    Microsecond switching of plasmonic nanorods in an all-fiber optofluidic component2017Ingår i: Operator Theory: Advances and Applications, ISSN 1004-4469, E-ISSN 2334-2536, Vol. 4, nr 8, s. 864-870Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    As information technologies move from electron- to photon-based systems, the need to rapidly modulate light is of paramount importance. Here, we study the evolution of the electric-field-induced alignment of gold nanorods suspended in organic solvents. The experiments were performed using an all-fiber optofluidic device, which enables convenient interaction of light, electric fields, and the nanorod suspension. We demonstrate microsecond nanorod switching times, three orders of magnitude faster than a traditional Freederickcz-based liquid crystal alignment mechanism. We find that the dynamics of the alignment agrees well with the Einstein–Smoluchowski relationship, allowing for the determination of the rotational diffusion coefficient and polarizability anisotropy of the nanorods as well as the effective length of the ligands capping the nanorods. The ability to dynamically control the optical properties of these plasmonic suspensions coupled with the point-to-point delivery of light from the fiber component, as demonstrated in this work, may enable novel ultrafast optical switches, filters, displays, and spatial light modulators.

  • 192.
    Etcheverry, Sebastian
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Faridi, A.
    KTH Royal Institute of Technology, Sweden.
    Ramachandraiah, H.
    KTH Royal Institute of Technology, Sweden.
    Kumar, T.
    KTH Royal Institute of Technology, Sweden.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Laurell, F.
    KTH Royal Institute of Technology, Sweden.
    Russom, A.
    KTH Royal Institute of Technology, Sweden.
    High performance micro-flow cytometer based on optical fibres2017Ingår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, nr 1, artikel-id 5628Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Flow cytometry is currently the gold standard for analysis of cells in the medical laboratory and biomedical research. Fuelled by the need of point-of-care diagnosis, a significant effort has been made to miniaturize and reduce cost of flow cytometers. However, despite recent advances, current microsystems remain less versatile and much slower than their large-scale counterparts. In this work, an all-silica fibre microflow cytometer is presented that measures fluorescence and scattering from particles and cells. It integrates cell transport in circular capillaries and light delivery by optical fibres. Single-stream cell focusing is performed by Elasto-inertial microfluidics to guarantee accurate and sensitive detection. The capability of this technique is extended to high flow rates (up to 800 μl/min), enabling a throughput of 2500 particles/s. The robust, portable and low-cost system described here could be the basis for a point-of-care flow cytometer with a performance comparable to commercial systems. © 2017 The Author(s).

  • 193.
    Etcheverry, Sebastian
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Russom, A.
    KTH Royal Institute of Technology, Sweden.
    Laurell, F.
    KTH Royal Institute of Technology, Sweden.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Fluidic trapping and optical detection of microparticles with a functional optical fiber2017Ingår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 25, nr 26, s. 33657-33663Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A fiber probe is presented that traps single micro-sized particles and allows detection of their optical properties. The trapping mechanism used is based on fluid suction with a micro-structured optical fiber that has five holes along its cladding. Proof-of-principle experiments with a diluted solution of fluorescently labeled particles are performed. The fiber probe presented here may find various applications in life-science and environmental monitoring. ©

  • 194.
    Etcheverry, Sebastian
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Russom, A.
    KTH Royal Institute of Technology, Sweden.
    Laurell, F.
    KTH Royal Institute of Technology, Sweden.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Trapping and optical identification of microparticles in a liquid with a functional optical fiber probe2018Ingår i: Conference on Lasers and Electro-Optics OSA Technical Digest (online) (Optical Society of America, 2018), paper AM4P.6, 2018Konferensbidrag (Refereegranskat)
    Abstract [en]

    A fiber probe traps single micrometer-particles by fluid suction into a hollow microstructure and enables optical identification by the fluorescence light collected in a fiber core. The probe finds applications in life-science and environmental monitoring.

  • 195.
    Etcheverry, Sebastián
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Araujo, Leonardo
    Universidade Federal de Pernambuco, Brazil.
    Carvalho, Isabel
    Universidade Federal de Pernambuco, Brazil.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Fontana, Jake
    Naval Research Laboratory, USA.
    Sub-microsecond switching times using dynamically tunable plasmonic pixels2018Konferensbidrag (Refereegranskat)
    Abstract [en]

    Liquid crystal based devices can arbitrarily control the amplitude, phase and polarization of light, enabling disruptive technologies such as flat screen televisions and smart phones. Yet, the Achilles heel of these devices are their slow, millisecond switching speeds, constraining potential applications. Here we develop the concept of a dynamic plasmonic pixel as a novel paradigm for liquid crystal devices using the electric field controlled alignment of gold nanorods. Experiments were performed using an electro-optic fluid fiber device, which enabled convenient interaction of light, electric fields and the nanorod suspension. We studied the evolution of the electric-field induced alignment of gold nanorods and demonstrate microsecond switching times, 3 orders of magnitude faster than a traditional Freederickcz-based liquid crystal alignment mechanism. We find that the dynamics of the alignment agrees well with the Einstein-Smoluchowski relationship. Furthermore, by digitally switching the nanorods between orthogonally aligned states, we show switching frequencies greater than MHz can be achieved. The development of these dynamically tunable plasmonic pixels may lead to ultrafast optical switches, filters, displays and spatial light modulators.

  • 196.
    Etcheverry, Sebastián
    et al.
    RISE., Swedish ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Faridi, Muhammad Asim
    KTH Royal Institute of Technology, Sweden.
    Ramachandraiah, Harisha
    KTH Royal Institute of Technology, Sweden.
    Margulis, Walter
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Laurell, Fredrik
    KTH Royal Institute of Technology, Sweden.
    Russom, Aman
    KTH Royal Institute of Technology, Sweden.
    All fiber based micro-flow cytometer by combining optical fiber with inertial focusing2016Ingår i: 20th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2016), 2016, Vol. 3, s. 1655-1656Konferensbidrag (Refereegranskat)
    Abstract [en]

    Towards a portable point of care flow cytometry platform, we present here an integrated all optical fiber-based optofluidic system capable of counting and discriminating fluorescent particles and cells. The robust and compact device incorporates optical fibers and circular capillaries to build an all-fiber optofluidic device to enable counting particles based on their fluorescent and back-scatter light emission. Here, we combine this with inertial- and elasto-inertial microfluidics for sheathless particle and cell focusing for integrated detection with scattering and fluorescence detections - all necessary components of standard cytometers. We validated the system for cell counting based on scattering and fluorescence.

  • 197.
    Etcheverry, Sebastián
    et al.
    RISE., Swedish ICT, Acreo, Fiber Optics. KTH Royal Institute of Technology, Sweden.
    Sudirman, Aziza
    RISE., Swedish ICT, Acreo, Fiber Optics. KTH Royal Institute of Technology, Sweden.
    Margulis, Walter
    RISE., Swedish ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Laurell, Fredrik
    KTH Royal Institute of Technology, Sweden.
    Identification and collection of particles with optical fibers2015Ingår i: Novel Biophotonics Techniques and Applications III / [ed] Arjen Amelink, I. Alex Vitkin, 2015, Vol. 9540, artikel-id 95400NKonferensbidrag (Refereegranskat)
    Abstract [en]

    A micro-structured fiber-based system for identification and collection of fluorescent particles is demonstrated. An optical fiber probe with longitudinal holes in the cladding is used to retrieve fluorescent particles by exerting microfluidics forces. Laser induced fluorescent (LIF) is carried out by the fiber probe and an optical setup. When a particle with a previously chosen fluorescence wavelength is identified, a vacuum pump is activated collecting the particle into a hole. Green and red fluorescent polystyrene particles were detected and selectively retrieved.

  • 198. Evekull, D
    et al.
    Johansson, S
    Olson, M
    Koch, R
    RISE., Swedish ICT, Acreo.
    Laurell, F
    Polymer encapsulated miniature Nd:YAG lasers2003Ingår i: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 39, s. 1446-48Artikel i tidskrift (Refereegranskat)
  • 199. Evekull, D
    et al.
    Rydholm, J
    Bjurshagen, S
    Bäcklin, L
    Kindlundh, M
    Kjellberg, L
    Koch, R
    RISE., Swedish ICT, Acreo.
    Olson, M
    High power Q-switched Nd:YAG laser mounted in a silicon microbench2004Ingår i: Optics Laser Technolog, Vol. 36, nr 5, s. 383-86Artikel i tidskrift (Refereegranskat)
  • 200.
    Fabiano, Simone
    et al.
    Linköping University, Sweden.
    Sani, Negar
    Linköping University, Sweden.
    Kawahara, Jun
    RISE - Research Institutes of Sweden, ICT, Acreo. LINTEC Corporation, Japan.
    Kergoat, Loig
    Linköping University, Sweden; Aix-Marseille University, France.
    Nissa, Josefin
    Linköping University, Sweden.
    Engquist, Isak
    Linköping University, Sweden.
    Crispin, Xavier
    Linköping University, Sweden.
    Berggren, Magnus
    Linköping University, Sweden.
    Ferroelectric polarization induces electronic nonlinearity in ion-doped conducting polymers2017Ingår i: Science Advances, E-ISSN 2375-2548, Vol. 3, nr 6, artikel-id e1700345Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is an organic mixed ion-electron conducting polymer. The PEDOT phase transports holes and is redox-active, whereas the PSS phase transports ions. When PEDOT is redox-switched between its semiconducting and conducting state, the electronic and optical properties of its bulk are controlled. Therefore, it is appealing to use this transition in electrochemical devices and to integrate those into large-scale circuits, such as display or memory matrices. Addressability and memory functionality of individual devices, within these matrices, are typically achieved by nonlinear current-voltage characteristics and bistability—functions that can potentially be offered by the semiconductor-conductor transition of redox polymers. However, low conductivity of the semiconducting state and poor bistability, due to self-discharge, make fast operation and memory retention impossible. We report that a ferroelectric polymer layer, coated along the counter electrode, can control the redox state of PEDOT. The polarization switching characteristics of the ferroelectric polymer, which take place as the coercive field is overcome, introduce desired nonlinearity and bistability in devices that maintain PEDOT in its highly conducting and fast-operating regime. Memory functionality and addressability are demonstrated in ferro-electrochromic display pixels and ferro-electrochemical transistors. 

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