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  • 1. Albert, Jacques
    et al.
    Fokine, Mikael
    KTH, Tidigare Institutioner                               , Fysik.
    Margulis, Walter
    KTH, Tidigare Institutioner                               , Fysik.
    Grating formation in pure silica-core fibers2002Inngår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, nr 10, s. 809-811Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Strong grating formation in pure silica-core fibers by use of 193-nm ArF-laser radiation is reported. Unsaturated refractive-index changes of Deltan similar to 0.3 X 10(-3) were observed in nontreated fiber, and changes of Deltan similar to 0.5 X 10(-3) were observed in fibers with a high hydroxyl concentration. Possible mechanisms of photosensitivity in pure silica-core fibers are discussed.

  • 2. Alcusa-Saez, E. P.
    et al.
    Diez, A.
    Rivera-Perez, E.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Norin, Lars
    ACREO.
    Andres, M. V.
    Acousto-optic interaction in polyimide coated optical fibers with flexural waves2017Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 25, nr 15, s. 17167-17173Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Acousto-optic coupling in polyimide-coated single-mode optical fibers using flexural elastic waves is demonstrated. The effect of the polyimide coating on the acoustooptic interaction process is analyzed in detailed. Theoretical and experimental results are in good agreement. Although the elastic attenuation is significant, we show that acousto-optic coupling can be produced with a reasonably good efficiency. To our knowledge, it is the first experimental demonstration of acousto-optic coupling in optical fibers with robust protective coating.

  • 3. Alcusa-Saez, E. P.
    et al.
    Diez, A.
    Rivera-Perez, E.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Norin, Lars
    Andres, M. V.
    All-fiber acousto-optic tunable filter in polyimide coated optical fibers2017Inngår i: 2017 19th International Conference on Transparent Optical Networks (ICTON), IEEE Computer Society, 2017, artikkel-id 8025093Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We present the experimental demonstration of in-fiber acousto-optic coupling in a polyimide-coated optical fiber. Although the presence of the polyimide coating increases is significantly the attenuation of the acoustic wave, we show that acousto-optic interaction can still be produced with reasonable efficiency. The effect of the polyimide coating on the acousto-optic interaction process is analyzed in detailed. Theoretical and experimental results are in good agreement. To our knowledge, this is the first experimental demonstration of acousto-optic coupling in optical fibers with robust protective coating.

  • 4. Camara, Alexandre R.
    et al.
    Pereira, Joao M. B.
    Tarasenko, Oleksandr
    Margulis, Walter
    Acreo Swedish ICT.
    Carvalho, Isabel C. S.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Optical creation and erasure of the linear electrooptical effect in silica fiber2015Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 23, nr 14, s. 18060-18069Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We study the creation and erasure of the linear electrooptical effect in silicate fibers by optical poling. Carriers are released by exposure to green light and displaced with simultaneous application of an internal dc field. The second order nonlinear coefficient induced grows with poling bias. The field recorded (similar to 10(8) V/m) is comparable to that obtained through classical thermal poling of fibers. In the regime studied here, the second-order nonlinearity induced (similar to 0.06 pm/V) is limited by the field applied during poling (1.2 x 10(8) V/m). Optical erasure with high-power green light alone is very efficient. The dynamics of the writing and erasing process is discussed, and the two dimensional (2D) field distribution across the fiber is simulated. (C) 2015 Optical Society of America

  • 5. Camara, Alexandre
    et al.
    Tarasenko, Oleksandr
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Acreo AB, Kista, Sweden .
    Study of thermally poled fibers with a two-dimensional model2014Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 22, nr 15, s. 17700-17715Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A two-dimensional (2D) numerical model is implemented to describe the movement of ions under thermal poling for the specific case of optical fibers. Three types of cations are considered (representing Na+, Li+ and H3O+) of different mobility values. A cross-sectional map of the carrier concentration is obtained as a function of time. The role of the various cations is investigated. The assumptions of the model are validated by comparing the predictions to experimental data of the time evolution of the nonlinearity induced. A variational analysis of poling parameters including temperature, poling voltage, sign of the bias potential and initial ionic concentrations is performed for a particular fiber geometry. The analysis allows identifying the impact of these parameters on the induced second-order nonlinearity in poled fibers.

  • 6. Carvalho, I. C. S.
    et al.
    Tarasenko, O.
    Camara, A. R.
    Pereira, J. M. B.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Pockels fibers by optical poling2015Inngår i: Workshop on Specialty Optical Fibers and their Applications, WSOF 2015, Optical Society of America, 2015Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Silica fibers with internal electrodes biased with HV are poled when simultaneously excited by green light. The x(2) induced measured through the Pockels effect at 1.55 μm reaches ~0.11 pm/V. Poling and erasure are studied. © OSA 2015.

  • 7. de Oliveira, R.
    et al.
    Sjödin, N.
    Fokine, Michael
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    de Matos, C.
    Norin, L.
    Fabrication and Optical Characterization of Silica Optical Fibers Containing Gold Nanoparticles2015Inngår i: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 7, nr 1, s. 370-375Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Gold nanoparticles have been used since antiquity for the production of red-colored glasses. More recently, it was determined that this color is caused by plasmon resonance, which additionally increases the material's nonlinear optical response, allowing for the improvement of numerous optical devices. Interest in silica fibers containing gold nanoparticles has increased recently, aiming at the integration of nonlinear devices with conventional optical fibers. However, fabrication is challenging due to the high temperatures required for silica processing and fibers with gold nanoparticles were solely demonstrated using sol-gel techniques. We show a new fabrication technique based on standard preform/fiber fabrication methods, where nanoparticles are nucleated by heat in a furnace or by laser exposure with unprecedented control over particle size, concentration, and distribution. Plasmon absorption peaks exceeding 800 dB m(-1) at 514-536 nm wavelengths were observed, indicating higher achievable nanoparticle concentrations than previously reported. The measured resonant nonlinear refractive index, (6.75 ± 0.55) × 10(-15) m(2) W(-1), represents an improvement of >50×.

  • 8.
    Estcheverry, Sebástian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Sudirman, A.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Playing cellular Golf in microstructured fibres2015Inngår i: Workshop on Specialty Optical Fibers and their Applications, WSOF 2015, 2015Konferansepaper (Fagfellevurdert)
    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. © OSA 2015.

  • 9.
    Etcheverry, S.
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Faridi, A.
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Ramachandraiah, H.
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Margulis, W.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Laurell, F.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Russom, A.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Optofludics in microstructured fibers combining particle elasto-inertial focusing and fluorescence2016Inngår i: 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), IEEE conference proceedings, 2016Konferansepaper (Fagfellevurdert)
    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.

  • 10.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo AB, Sweden.
    Araujo, Leonardo F.
    Carvalho, Isabel C. S.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Rise ACREO AB, Sweden.
    Fontana, Jake
    Digital switching of plasmonic nanorods with nanosecond response timesInngår i: Artikkel i tidsskrift (Fagfellevurdert)
    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 nanoseconds. The high-speed digital switching of plasmonic nanorods integrated into an all-fiber optical component may provide novel opportunities for remote sensing and signaling applications.

  • 11.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. Department of Fiber Optics, RISE Acreo, Box 1070, SE-164 25, Kista, Sweden.
    Araujo, Leonardo F.
    Carvalho, Isabel
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Department of Fiber Optics, RISE Acreo, Box 1070, SE-164 25, Kista, Sweden.
    Fontana, Jake
    Digital electric field induced switching of plasmonic nanorods using an electro-optic fluid fiberInngår i: Applied Ecology and Environmental Research, ISSN 1589-1623, E-ISSN 1785-0037Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We demonstrate the digital electric eld 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 sub-microsecond switching times. We also show, from an initial unaligned state, that the nanorods can be aligned into the applied electric field direction in 110 nanoseconds. The high-speed digital switching of plasmonic nanorods integrated into an all-ber optical component may provide novel opportunities for remote sensing and signaling applications.

  • 12.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Faridi, Asim
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Ramachandraiah, Harisha
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Kumar, Tharagan
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Russom, Aman
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    All silica fibre microflow cytometerManuskript (preprint) (Annet vitenskapelig)
    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 optical accuracy and sensitivity.  The capability of this technique is extended to high flow rates (up to 800 µl/min), enabling 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. 

  • 13.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo AB, Sweden.
    Russom, Aman
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Fluidic trapping and optical detection of microparticles with a functional optical fiberInngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087Artikkel i tidsskrift (Annet vitenskapelig)
    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.  

  • 14.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Acreo Swedish ICT AB, Sweden.
    Sudirman, Aziza
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Acreo Swedish ICT AB, Sweden.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Acreo Swedish ICT AB, Sweden.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Identification and collection of particles with optical fibers2015Inngår i: NOVEL BIOPHOTONICS TECHNIQUES AND APPLICATIONS III, 2015, Vol. 9540, artikkel-id 95400NKonferansepaper (Fagfellevurdert)
    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.

  • 15.
    Etcheverry, Sebastián
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo, Sweden.
    Araujo, Leonardo F.
    Carvalho, Isabel C. S.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo, Sweden.
    Fontana, Jake
    Digital electric field induced switching of plasmonic nanorods using an electro-optic fluid fiber2017Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 111, nr 22, artikkel-id 221108Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 16.
    Etcheverry, Sebastián
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Araujo, Leonardo F.
    da Costa, Greice K. B.
    Pereira, Joao M. B.
    Camara, Alexandre R.
    Naciri, Jawad
    Ratna, Banahalli R.
    Hernandez-Romano, Ivan
    de Matos, Christiano J. S.
    Carvalho, Isabel C. S.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Fontana, Jake
    Microsecond switching of plasmonic nanorods in an all-fiber optofluidic component2017Inngår i: Optica, ISSN 2334-2536, Vol. 4, nr 8, s. 864-870Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 17.
    Etcheverry, Sebastián
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo AB, Sweden.
    Faridi, Muhammad Asim
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Ramachandraiah, Harisha
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Kumar, T.
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo AB, Sweden.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Russom, Aman
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    High performance micro-flow cytometer based on optical fibres2017Inngår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, artikkel-id 5628Artikkel i tidsskrift (Fagfellevurdert)
    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 mu l/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.

  • 18.
    Etcheverry, Sebastián
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Department of Fiber Optics, RISE Acreo AB, Stockholm, Sweden.
    Russom, Aman
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Trapping and optical identification of microparticles in a liquid with a functional optical fiber probe2018Inngår i: Optics InfoBase Conference Papers, Optical Society of America, 2018Konferansepaper (Fagfellevurdert)
    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.

  • 19. Fanjoux, Gil
    et al.
    Sudirman, Aziza
    Beugnot, Jean-Charles
    Furfaro, Luca
    Margulis, Walter
    Sylvestre, Thibaut
    Stimulated Raman–Kerr scattering in an integrated nonlinear optofluidic fiber arrangement2014Inngår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 39, nr 18, s. 5407-5410Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We describe a novel optofluidic fiber arrangement that allows for nonlinear effects enhancement between fluids and laser light while suppressing the generation of cavitation bubbles. By filling this optofluidic system with toluene and pumping it with a nanosecond microchip laser, we demonstrate the efficient generation of a broadband Raman frequency comb spanning from 532 to more than 1000 nm. It is further shown that the Raman frequency comb dramatically broadens toward broadband continuum light due to the stimulated Raman–Kerr scattering.

  • 20.
    Fokine, Michael
    et al.
    KTH, Tidigare Institutioner                               , Fysik.
    Margulis, Walter
    KTH, Tidigare Institutioner                               , Fysik.
    Large increase in photosensitivity through massive hydroxyl formation2000Inngår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 25, nr 5, s. 302-304Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We report a large increase in photosensitivity of germanium-doped silicate fibers by rapid heat treatment of hydrogen-loaded fibers at 1000 degrees C before exposure of the fibers to 242-nm radiation. The increase in photosensitivity is compared with thermally induced absorption caused by introduction of massive amounts of hydroxyl species. The absorption loss was measured to be 0.02 dB/cm mol.% OH at 1.55 mu m. Strong gratings (Delta n > 1 x 10(-4)) in germanium-free phosphorous-doped fibers in the presence of 242-nm radiation have also been manufactured by this technique.

  • 21.
    Fokine, Mikael
    et al.
    KTH, Tidigare Institutioner                               , Fysik.
    Nilsson, Lars-Erik
    Claesson, Åke
    Berlemont, D
    Kjellberg, L
    Krummenacher, L
    Margulis, Walter
    KTH, Tidigare Institutioner                               , Fysik.
    Integrated fiber Mach-Zehnder interferometer for electro-optic switching2002Inngår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, nr 18, s. 1643-1645Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Molten alloys under high pressure were used to obtain fibers with long internal electrodes that are solid at room temperature. An integrated Mach-Zehnder interferometer was constructed from a twin-core twin-hole fiber that permitted application of an electric field preferentially to one of the cores. Good stability and a switching voltage of 1.4 kV were measured with a 1-m-long fiber device with a quadratic voltage dependence.

  • 22. Garcia, FC
    et al.
    Fokine, Mikael
    KTH, Tidigare Institutioner                               , Fysik.
    Margulis, Walter
    KTH, Tidigare Institutioner                               , Fysik.
    Kashyap, Raman
    Mach-Zehnder interferometer using single standard telecommunication optical fibre2001Inngår i: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 37, nr 24, s. 1440-1442Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    It is demonstrated that a single, short-length, standard telecommunications optical fibre can function as an interferometer when subjected to hydroxyl-flooding. The interferometer is based on the mode beating effect arising from the induced-refractive index change.

  • 23. Garcia-Ruiz, A.
    et al.
    Martins, H. F.
    Magalhães, R.
    Pereira, Joao
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Tarasenko, O.
    Norin, L.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Martin-Lopez, S.
    Gonzalez-Herraez, M.
    Hermetic all-fiber phase modulators using Joule heating in carbon-coated fibers2018Inngår i: Optics InfoBase Conference Papers, OSA - The Optical Society , 2018Konferansepaper (Fagfellevurdert)
    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. 

  • 24.
    Garcia-Ruiz, Andres
    et al.
    Univ Alcala De Henares, Dept Elect, Alcala De Henares 28805, Spain..
    Martins, Hugo F.
    Univ Alcala De Henares, Dept Elect, Alcala De Henares 28805, Spain..
    Magalhaes, Regina
    Univ Alcala De Henares, Dept Elect, Alcala De Henares 28805, Spain..
    Pereira, Joao
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo AB, Dept Fiber Photon, S-16440 Kista, Sweden..
    Tarasenko, Oleksandr
    RISE Acreo AB, Dept Fiber Photon, S-16440 Kista, Sweden..
    Norin, Lars
    RISE Acreo AB, Dept Fiber Photon, S-16440 Kista, Sweden..
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo AB, Dept Fiber Photon, S-16440 Kista, Sweden..
    Martin-Lopez, Sonia
    Univ Alcala De Henares, Dept Elect, Alcala De Henares 28805, Spain..
    Gonzalez-Herraez, Miguel
    Univ Alcala De Henares, Dept Elect, Alcala De Henares 28805, Spain..
    Hermetic Carbon Coatings for Electro-Thermal All-Fiber Phase Modulators2019Inngår i: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 37, nr 18, s. 4567-4572Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Joule effect and thermal response of several carbon-coated fibers are modeled and analyzed. 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 fiber 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.

  • 25. Gerosa, R. M.
    et al.
    Sudirman, Aziza
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Menezes, L. D. S.
    De Matos, C. J. S.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    All-fiber high-flow microfluidic dye laser2013Inngår i: Optics InfoBase Conference Papers, 2013Konferansepaper (Fagfellevurdert)
    Abstract [en]

    An all-fiber dye laser is demonstrated. The dye solution is kept under flow, allowing for high repetition rate pumping. Threshold average pump power of 2.15 mW and conversion slope efficiency of ~8.5% are achieved.

  • 26. Gerosa, Rodrigo M.
    et al.
    Sudirman, Aziza
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Acreo Swedish ICT, Sweden.
    Menezes, Leonardo de S.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Acreo Swedish ICT, Sweden.
    de Matos, Christiano J. S.
    All-fiber high repetition rate microfluidic dye laser2015Inngår i: Optica, ISSN 2334-2536, Vol. 2, nr 2, s. 186-193Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Optofluidic dye lasers may play a significant role in future laser applications in numerous areas, combining wavelength flexibility with integration and ease of operation. Nevertheless, no all-fiber integrated dye lasers have been demonstrated so far. In this paper, we report on a series of optofluidic all-fiber Rhodamine optical sources operating at a repetition rate as high as 1 kHz. Dye bleaching is avoided by circulating the Rhodamine dye during optical excitation. The laser radiation is extracted via conventional fibers that are spliced to the dye-filled capillary active medium. A tuneable amplified spontaneous emission source, a multimode laser, and a few transverse-mode laser are demonstrated by adjusting the setup. Threshold pump energies as low as similar to 1 mu J and slope efficiencies of up to mu 9% were obtained, indicating the potential for realworld applications in areas such as spectroscopy and biomedicine.

  • 27.
    Graziosi, Marcello
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Tarasenko, O.
    Electric field measurement with poled fiber in a sagnac interferometer2013Inngår i: Optics InfoBase Conference Papers, 2013Konferansepaper (Fagfellevurdert)
    Abstract [en]

    E-field sensing with a thermally poled fiber in a Sagnac interferometer is presented. Contactless detection is achieved for fields > 0:23MV=m at 50Hz and higher sensitivity is obtained at higher frequencies.

  • 28. Hellsing, M
    et al.
    Fokine, Michael
    Claesson, A
    Nilsson, E
    Margulis, Walter
    ToF-SIMS imaging of dopant diffusion in optical fibers2003Inngår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 203, s. 648-651Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Applications of optical fibers in telecommunication and sensing are rapidly emerging where the fiber properties are related to the controlled addition of dopants such as germanium, phosphorous, fluorine and erbium. The modern ToF-SIMS instrument, with its high sensitivity and high lateral resolution, has shown to be an excellent tool to directly analyze cross-sections of as-manufactured fibers. The present work describes ToF-SIMS imaging of the dopant distribution in fluorine, germanium and rare-earth doped fibers where dopants are confined to a few mum in the core. The increased fluorine diffusion in the fluorine doped fibers due to chemical reactions with hydroxyl groups was examined. This process is utilized in the manufacture of thermally stable chemical composition fiber Bragg gratings. We were able to produce ToF-SIMS elemental images with a lateral resolution around 0.5 mum showing the detailed distribution of the dopants.

  • 29.
    Jelger, Pär
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Enström, A.
    Claesson, Å.
    Margulis, Walter
    An In-Fibre Microcavity2007Inngår i: 2007 CONFERENCE ON LASERS & ELECTRO-OPTICS/QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (CLEO/QELS 2007), NEW YORK: IEEE , 2007, s. 1233-1234Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A novel all-fiber spliced microcavity for chemical and biological optical studies is described. Its design allows coupling with low loss light from a fiber into a liquid or gas contained in a capillary or PCF.

  • 30. Kabakova, Irina V.
    et al.
    Yu, Zhangwei
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Halliwell, David
    Fonjallaz, Pierre-Yves
    Tarasenko, Oleksandr
    de Sterke, C. Martijn
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Switching and dynamic wavelength conversion in a fiber grating cavity2012Inngår i: Journal of the Optical Society of America. B, Optical physics, ISSN 0740-3224, E-ISSN 1520-8540, Vol. 29, nr 1, s. 155-160Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Switching and dynamic wavelength conversion of light are demonstrated in a fiber grating cavity detuned by high-voltage electrical pulses. The cavity dynamics is studied using a heterodyne technique in which the frequency-shifted light, trapped by the cavity, mixes with the backreflected light at the incident frequency. We find that the frequency shift scales linearly with the energy of the electric driving pulses.

  • 31.
    Lopez, Daniel
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Tarasenko, O.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    All-fiber Kerr cell2012Inngår i: 2012 Conference on Lasers and Electro-Optics, CLEO 2012, IEEE , 2012, s. 6325852-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report a Kerr Cell constructed in a three-hole microstructured fiber with internal electrodes, filled with liquid (nitrobenzene) and fully spliced. Nanosecond polarization rotation at 1.06 mu m is achieved with V-pi 85 V.

  • 32.
    Lopez-Cortes, Daniel
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Tarasenko, O.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    All-fiber Kerr cell2012Inngår i: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 37, nr 15, s. 3288-3290Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An all-fiber nanosecond Kerr light gate is described that was constructed using microstructured fibers. The switching voltage for a 20 cm long device is as low as Vp ∌ 85 V at a 1.06 Όm wavelength. The device is fully spliced. The active element is a three-hole fiber provided with internal electrodes in the side-holes and a liquid core of nitrobenzene, which is fully enclosed. This work allows the exploiting of electrically driven liquid-core fibers and demonstrated the removal of the major limitations of Kerr cells in the past, allowing for integration, safe use, and relatively low switching voltage.

  • 33.
    Malmström, Mikael
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Lecourt, J-B
    Multitel Applied Photonics Department, Belgium.
    Hernandez, Y
    Multitel Applied Photonics Department, Belgium.
    Giannone, D
    Multitel Applied Photonics Department, Belgium.
    Tarasenko, Oleksandr
    Acreo AB, Electrum, Kista.
    Margulis, Walter
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Q-switched all-fiber Ytterbium laser with an integrated polarization switch2010Inngår i: 4th EPS-QEOD Europhoton Conference, 2010Konferansepaper (Fagfellevurdert)
    Abstract [en]

    An all-fiber nanosecond risetime polarizationswitch is employed in an Ytterbium cavity. Thepulsed laser operation is polarized and in the1 μm wavelength range. The main optical outputcharacteristics are: repetition rate of 2 kHz,pulse energy of 13 uJ, and peak powers close to 90Watts.

  • 34.
    Malmström, Mikael
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Tarasenko, Oleksandr
    Acreo AB.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Mode locking of Er fiber laser with electro optical fiber modulator2011Inngår i: 2nd EOS Topical Meeting on Lasers (ETML'11): 4th EOS Topical Meeting on Optical Microsystems (OμS’11), 2011Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper demonstrates a self-starting mode-locked fiber laser that incorporates anelectrooptical fiber modulator and exploits soliton compression for picosecond pulsegeneration. The ring laser runs at 1.3 MHz, the pulse duration is ~2 ps and thebandwidth ~1 nm. The laser cavity is all fiber-based and the fiber modulator stabilizespulse formation.

  • 35.
    Malmström, Mikael
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Tarasenko, Oleksandr
    Acreo.
    Pasiskevicius, Valdas
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Soliton generation from an actively mode-locked fiber laser incorporating an electro-optic fiber modulator2012Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 20, nr 3, s. 2905-2910Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This work demonstrates an actively mode-locked fiber laser operating in soliton regime and employing an all-fiber electro-optic modulator. Nonlinear polarization rotation is utilized for femtosecond pulse generation. Stable operation of the all-fiber ring laser is readily achieved at a fundamental repetition rate of 2.6 MHz and produces 460 fs pulses with a spectral bandwidth of 5.3 nm.

  • 36.
    Malmström, Mikael
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Yu, Zhangwei
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Tarasenko, Oleksandr
    Acreo AB.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    All-Fiber Q-Switched and Cavity Dumped Laser Using an Electrically Addressed Microstructured Fiber2010Inngår i: Advanced Solid-State Photonics, 2010Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We report on a pulsed fiber laser with two regimes of operation, one where cavity-roundtrip pulse durations are produced (85 ns long, 40 Wpp) and one with high power pulses (2 ns long, 148 Wpp).

  • 37.
    Malmström, Mikael
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Tarasenko, Oleksandr
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Pulse selection at 1 MHz with electrooptic fiber switch2012Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 20, nr 9, s. 9465-9470Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Two 78-cm long electrooptic fibers with nonlinear coefficient. chi((2)) similar to 0.26 pm/V are used in a Sagnac loop for pulse selection at up to 1 MHz repetition rate. Laser pulses of 1.5 mu m wavelength arriving at every 140 ns are selected with an extinction ratio as high as -30 dB. The arrangement is entirely based on silica fiber.

  • 38.
    Malmström, Mikael
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. Uppsala University, Sweden.
    Tarasenko, Oleksandr
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. Acreo Swedish ICT AB, Dept Fiber Photon, Stockholm, Sweden.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    All-Fiber Nanosecond Gating for Time-Resolved Spectral Analysis2016Inngår i: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 28, nr 8, s. 829-832Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We demonstrate the addition of time gating to a standard optical spectrum analyzer (OSA) operating in the spectral region similar to 1.06 mu m. This is accomplished by opening for 7 ns the optical input to the OSA with an electrically driven poled fiber in a Sagnac loop. The sequential interrogation with nanosecond resolution of the reflection from three fiber Bragg gratings along a piece of fiber allows distinguishing the spectral peaks created with a minimum separation of 85 cm. The passive extinction ratio of this device is >40 dB and returns to >40 dB from >23 dB on a 35-ns time scale directly after time gating.

  • 39.
    Malmström, Mikael
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Tarasenko, Oleksandr
    Acreo AB.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Ytterbium-doped fiber laser mode-locked with electrooptical fiber2012Inngår i: Europhoton: 5th EPS-QEOD Europhoton 2012, 2012Konferansepaper (Fagfellevurdert)
    Abstract [en]

    An actively mode-locked Yb-doped fiber laser is demonstrated, incorporating an electrooptical fiber phase modulator, driven with 40 Vpp. The all-spliced linear cavity generates subnanosec- ond pulses at 1065 nm wavelength with a fundamental repetition rate of 15.6 MHz. It produces comparable output pulses up to the 7th harmonic at 109 MHz.

  • 40.
    Malmström, Mikael
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Yu, Zhangwei
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Tarasenko, O.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    All-fiber cavity dumping2009Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 17, nr 20, s. 17596-17602Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Cavity dumping of an all-fiber laser system is demonstrated. The active element is a pulse-picker with nanosecond rise time consisting of a microstructured fiber with electrically driven internal electrodes. The device is used for intracavity polarization rotation and dumping through a polarization splitter. The optical flux is removed from the cavity within one roundtrip and most of the amplified spontaneous emission, spiking and relaxation oscillation that follow during the gain recovery phase of the laser are blocked from the output signal.

  • 41.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. RISE Acreo, Dept Fiber Opt, S-16440 Kista, Sweden..
    Glowing fabrics communicate2018Inngår i: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 560, nr 7717, s. 170-171Artikkel i tidsskrift (Annet vitenskapelig)
  • 42. Margulis, Walter
    et al.
    Laurell, Fredrik
    KTH, Tidigare Institutioner, Fysik.
    Förfarande för tillverkning av optiska vågledare: [Preparation of single mode optical waveguides]1997Patent (Annet (populærvitenskap, debatt, mm))
    Abstract [en]

    A technique for the preparation of waveguides from optic material, comprises creating the total reflection by reducing the refraction index in the regions surrounding those areas which become light conducting by applying a high electric field over a certain period of time, which leads to ions being transported away through the material without them being replaced by fresh ions. Preferably the optic material is an alkali-rich glass such as soda-lime or boron silicate glass, or it is a semiconductor-doped glass, or it is based on alumina. The following waveguide preparation methods based on the use of conventional (field-assisted) ion exchange techniques to define a core and mantle, are also claimed : (i) polarisation of the substrate after the core and mantle have been defined, so that the refraction index is reduced to a value equal to or greater than that for the core by polarising the mantle ; and (ii) polarisation of the core periodically in the length direction and polarisation of the mantle continuously in the length direction, once the core and mantle have been defined, so that the average refraction index value for the core is reduced to a value less than the refraction index for the mantle.

  • 43.
    Margulis, Walter
    et al.
    Acreo AB, Sweden.
    Malmström, Mikael
    Acreo AB, Sweden.
    Rugeland, Patrik
    Acreo AB, Sweden.
    Tarasenko, Oleksandr
    Second-order Nonlinearity in Fibers and Applications2012Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Fiber modulators with strong field recorded exhibit the linear electrooptic effect. Interferometry transforms phase- into intensity modulation. Vπ 100-V is obtained, with an electrical bandwidth of tens of MHz. Applications and limitations are discussed.

  • 44.
    Margulis, Walter
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Malmström, Mikael
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Tarasenko, Oleksandr
    Acreo.
    Yu, Zhangwei
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Rugeland, Patrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Electrical fiber components and applications [invited]2012Konferansepaper (Annet vitenskapelig)
  • 45.
    Margulis, Walter
    et al.
    Acreo AB.
    Rugeland, Patrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Zetterlund, Erik
    Acreo AB.
    Antoine, Loirette
    Sudirman, Aziza
    Sterner, Carola
    Acreo AB.
    Eriksson, Mats
    Acreo AB.
    Eriksson-Quist, Helena
    Acreo AB.
    Gemini fibers for sensing2010Konferansepaper (Fagfellevurdert)
  • 46.
    Margulis, Walter
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Tarasenko, O.
    Malmström, Mikael
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Rugeland, Patrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Yu, Zhangwei
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Electrically controlled fibers2012Inngår i: Technical Digest - 2012 17th Opto-Electronics and Communications Conference, OECC 2012, IEEE , 2012, s. 803-804Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Fibers with internal electrodes are driven electrically. They allow for the control of polarization, wavelength tuning, nanosecond light gating, Q-switching and mode-locking of lasers. These are some of the applications discussed in this paper.

  • 47.
    Margulis, Walter
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Tarasenko, Oleksandr
    Acreo AB.
    Malmström, Mikael
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Myrén, Niklas
    Yu, Zhangwei
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Electrically controlled fibers: what next2011Inngår i: 7th International Workshop on Fibre Optics and Passive Components, 2011Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The ability of providing a fiber with internal electrodes opens the doors for electricalcontrol of light in fibers. Refractive index change through poling and acoustic pulses arising fromheated electrodes are exploited to this end. We discuss main achievements and limitations, andlook ahead to what needs to be done for making these components more widely usable.

  • 48.
    Margulis, Walter
    et al.
    Acreo AB.
    Tarasenko, Oleksandr
    Acreo AB.
    Malmström, Mikael
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Rugeland, Patrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Yu, Zhangwei
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    High-Speed Switching in Optical Fibers2010Konferansepaper (Fagfellevurdert)
  • 49.
    Margulis, Walter
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. Acreo, Kista, Sweden.
    Tarasenko, Oleksandr V.
    Yu, Zhangwei
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. Zhejiang University, China .
    Fonjallaz, P. -Y
    Knape, Harald
    High-speed fiber switches2008Inngår i: AIP Conference Proceedings, 2008, s. 23-25Konferansepaper (Fagfellevurdert)
    Abstract [en]

    All-fiber optical switches based on fiber with electrodes exhibit transition times <10ns. The devices are monolithic and robust, they are simple and could potentially be manufactured at low cost. The insertion loss is extremely low and the devices are compatible with single mode fiber technology. Two types of switches are discussed, one based on polarization rotation, the other one relying on the wavelength shift of a fiber Bragg grating (FBG).

  • 50.
    Margulis, Walter
    et al.
    Acreo AB.
    Tarasenko, Oleksandr
    Acreo AB.
    Yu, Zhangwei
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Malmström, Mikael
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Sterner, Carola
    Acreo AB.
    Rugeland, Patrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Myrén, Niklas
    Knape, Harald
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Applications of fibers with electrodes2010Konferansepaper (Fagfellevurdert)
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