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  • 1. Albert, J
    et al.
    Fokine, M
    Margulis, W
    RISE, Swedish ICT, Acreo.
    Grating formation in pure silica-core fibers2002In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, no 10, p. 809-811Article in journal (Refereed)
  • 2. Candiani, A
    et al.
    Konstantaki, M
    Margulis, W
    RISE, Swedish ICT, Acreo.
    Pissadakis, S
    Optofluidic magnetometer developed in a microstructured optical fiber2012In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 37, no 21, p. 67-69Article in journal (Refereed)
    Abstract [en]

    A directional, in-fiber optofluidic magnetometer based on a microstructured optical fiber (MOF) Bragg-grating infiltrated with a ferrofluidic defect is presented. Upon application of a magnetic field, the ferrofluidic defect moves along the length of the MOF Bragg grating, modifying its reflection spectrum. The magnetometer is capable of measuring magnetic fields from 317 to 2500 G. The operational principle of such in-fiber magnetic field probe allows the elaboration of directional measurements of the magnetic field flux._x000D_

  • 3. Candiani, A
    et al.
    Margulis, W
    RISE, Swedish ICT, Acreo.
    Sterner, C
    RISE, Swedish ICT, Acreo.
    Konstantaki, M
    Pissadakis, S
    Phase-shifted Bragg microstuctured optical fibre grating utilizing infiltrated ferrofluidics2011In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 36, no 13, p. 2548-50Article in journal (Refereed)
  • 4. Engholm, M
    et al.
    Jelger, P
    Laurell, F
     Norin, L
    RISE, Swedish ICT, Acreo.
    Improved photodarkening resistivity in ytterbium-doped fiber lasers by cerium codoping2009In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 24, no 8, p. 1285-Article in journal (Refereed)
  • 5. Engholm, M
    et al.
     Norin, L
    RISE, Swedish ICT, Acreo.
    Comment on: "Photodarkening in Yb-doped aluminosilicate fibers induced by 488 nm irradiation"2008In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 33, no 11, p. 1216-Article in journal (Refereed)
  • 6. Engholm, M
    et al.
     Norin, L
    RISE, Swedish ICT, Acreo.
    Strong UV-absorption visible luminescence in ytterbium-doped aluminosilicate glass under UV-excitation2007In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 32, p. 3352-54Article in journal (Refereed)
  • 7. Fanjoux, G
    et al.
    Sudirman, A
    Beugnot, J-C
    Furfaro, L
    Margulis, W
    RISE, Swedish ICT, Acreo.
    Sylvestre, T
    Stimulated Raman-Kerr scattering in an integrated nonlinear optofluidic fiber arrangement2014In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 39, no 18Article in journal (Refereed)
  • 8.
    Fokine, M
    RISE, Swedish ICT, Acreo.
    Growth dynamics of chemical composition gratings in optical fiber2002In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, p. 1974-76Article in journal (Refereed)
  • 9.
    Fokine, M
    RISE, Swedish ICT, Acreo.
    Thermal stability of chemical composition gratings in optical fiber2002In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, p. 1016-18Article in journal (Refereed)
  • 10.
    Fokine, M
    RISE, Swedish ICT, Acreo.
    Thermal stability of oxygen-modulated gratings in standard telecommunication fiber2004In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 29, no 11, p. 1185-87Article in journal (Refereed)
  • 11. Fokine, M
    et al.
    Margulis, W
    RISE, Swedish ICT, Acreo.
    Large increase in photosensitivity through massive hydroxyl formation2000In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 25, no 5, p. 302-Article in journal (Refereed)
  • 12.
    Fokine, M
    et al.
    RISE, Swedish ICT, Acreo.
    Nilsson, LE
    Claesson, Å
    RISE, Swedish ICT, Acreo.
    Berlemont, D
    Kjellberg, L
    Krummenacher, L
    Margulis, W
    RISE, Swedish ICT, Acreo.
    Integrated fiber Mach Zehnder interferometer for electro-optic switching2002In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, no 18, p. 1643-45Article in journal (Refereed)
  • 13. Gomes, A S L
    et al.
    Carvalho, M T
    Sundheimer, M L
    Bastos-Filho, C J A
    Martins-Filho, J F
    von der Weid, J P
    Margulis, W
    RISE, Swedish ICT, Acreo.
    Low-pump-power, short-fiber copropagating dual-pumped (800 1050nm) thulium-doped fiber amplifier2003In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 28, no 5, p. 334-36Article in journal (Refereed)
  • 14.
    Granberg, H
    et al.
    RISE, Swedish ICT, Acreo.
    Edström, P
    Quantification of the intrinsic error of the Kubelka-Munk model caused by strong light absorption2003In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 29, p. 386-90Article in journal (Refereed)
  • 15. Huyang, G
    et al.
    Canning, J
    Aslund, M-L
    Naqshbandi, M
    Gibson, B
    Petermann, I
    RISE, Swedish ICT, Acreo.
    Stocks, D
    Crossley, M-J
    Porphyrin doped sol-gel lined structured optical fibres for local remote sensing2011In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 36, no 11, p. 1975-Article in journal (Refereed)
  • 16.
    Johannisson, P
    et al.
    RISE, Swedish ICT, Acreo.
    Anderson, D
    Berntson, A
    RISE, Swedish ICT, Acreo.
    Mårtensson, J
    RISE, Swedish ICT, Acreo.
    Generation dynamics of ghost pulses in strongly dispersion-managed fiber-optic communication systems2001In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 26, p. 1227-29Article in journal (Refereed)
  • 17.
    Johannisson, P
    et al.
    RISE, Swedish ICT, Acreo.
    Anderson, D
    Marklund, M
    Berntson, A
    RISE, Swedish ICT, Acreo.
    Forzati, M
    RISE, Swedish ICT, Acreo.
    Mårtensson, J
    RISE, Swedish ICT, Acreo.
    Suppression of nonlinear effects by phase alternation in strongly dispersion-managed optical transmission2002In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, no 12Article in journal (Refereed)
  • 18. Knape, H
    et al.
     Margulis, W 
    RISE, Swedish ICT, Acreo.
    All-fiber polarization switch2007In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 32, p. 614-16Article in journal (Refereed)
  • 19.
    Mårtensson, J
    et al.
    RISE, Swedish ICT, Acreo.
    Berntson, A
    RISE, Swedish ICT, Acreo.
    Westlund, M
    Danielsson, A
    Johannisson, P
    RISE, Swedish ICT, Acreo.
    Anderson, D
    Lisak, M
    Timing jitter owing to intrachannel pulse interactions in dispersion-managed transmission systems2001In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 26, p. 55-57Article in journal (Refereed)
  • 20.
    Pang, Xiaodan
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Ozolins, Oskars
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Schatz, Richard
    KTH Royal Institute of Technology, Sweden.
    Storck, Joakim
    KTH Royal Institute of Technology, Sweden.
    Udalcovs, Aleksejs
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Navarro, Jaime Rodrigo
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Kakkar, Aditya
    KTH Royal Institute of Technology, Sweden.
    Maisons, Gregory
    mirSense Centre d’intégration NanoInnov, France.
    Carras, Mathieu
    mirSense Centre d’intégration NanoInnov, France.
    Jacobsen, Gunnar
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Popov, Sergei
    KTH Royal Institute of Technology, Sweden.
    Lourdudoss, Sebastian
    KTH Royal Institute of Technology, Sweden.
    Gigabit free-space multi-level signal transmission with a mid-infrared quantum cascade laser operating at room temperature2017In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 42, no 18, p. 3646-3649Article in journal (Refereed)
    Abstract [en]

    Gigabit free-space transmissions are experimentally demonstrated with a quantum cascaded laser (QCL) emitting at mid-wavelength infrared of 4.65 μm, and a commercial infrared photovoltaic detector. The QCL operating at room temperature is directly modulated using on–off keying and, for the first time, to the best of our knowledge, four- and eight-level pulse amplitude modulations (PAM-4, PAM-8). By applying pre- and post-digital equalizations, we achieve up to 3 Gbit/s line data rate in all three modulation configurations with a bit error rate performance of below the 7% overhead hard decision forward error correction limit of 3.8 × 10−3. The proposed transmission link also shows a stable operational performance in the lab environment.

  • 21. Popov, S
    et al.
    Vanin, E
    RISE, Swedish ICT, Acreo.
    Jacobsen, G
    RISE, Swedish ICT, Acreo.
    Influence of PMD value in dispersion compensating fibers on polarization dependence of Raman gain2002In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, p. 848-50Article in journal (Refereed)
  • 22. Rugeland, P
    et al.
    Yu, Z
    RISE, Swedish ICT, Acreo.
    Sterner, C
    RISE, Swedish ICT, Acreo.
    Tarasenko, O
    RISE, Swedish ICT, Acreo.
    Tengstrand, G
    Margulis, W
    RISE, Swedish ICT, Acreo.
    Photonic Scanning Receiver Using Electrically Tuned FBG2009In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 34, no 24, p. 3794-96Article in journal (Refereed)
  • 23. Salgueiro, J
    et al.
    Carlsson, A
    RISE, Swedish ICT, Acreo.
    Ostrovskaya, E
    Kivshar, Y
    Second-harmonic generation in vortex-induced waveguides2004In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 29, no 6, p. 593-95Article in journal (Refereed)
  • 24. Sergeyev, S V
    et al.
    Vanin, E V
    RISE, Swedish ICT, Acreo.
    Popov, S
    Suppression of dynamic instabilities in erbium-doped fiber amplifiers with a combined gain control system2002In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 27, p. 1117-19Article in journal (Refereed)
  • 25.
    Tarasenko, O
    et al.
    RISE, Swedish ICT, Acreo.
     Margulis, W
    RISE, Swedish ICT, Acreo.
    Electro-optical fiber modulation in a Sagnac interferometer2007In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 32, no 11, p. 1356-58Article in journal (Refereed)
  • 26.
    Vanin, E
    RISE, Swedish ICT, Acreo.
    Signal restoration in intensity-modulated optical OFDM access systems2011In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 36, no 22, p. 4338-40Article in journal (Refereed)
  • 27.
    Vanin, E
    et al.
    RISE, Swedish ICT, Acreo.
    Jacobsen, G
    RISE, Swedish ICT, Acreo.
    Berntson, A
    RISE, Swedish ICT, Acreo.
    Effective simulation method for parametric signal-noise interaction in transmission fibers2006In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 31, no 15, p. 2272-74Article in journal (Refereed)
  • 28.
    Vanin, E
    et al.
    RISE, Swedish ICT, Acreo.
     Jacobsen, G
    RISE, Swedish ICT, Acreo.
    Berntson, A
    RISE, Swedish ICT, Acreo.
    Nonlinear phase noise separation method for on-off keying transmission system modeling with non-Gaussian noise generation in optical fibers2007In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 32, p. 1740-Article in journal (Refereed)
  • 29.
    Zhang, Lu
    et al.
    Shanghai Jiao Tong University, China ; KTH Royal Institute of Technology, Sweden.
    Hong, Xuezhi.
    KTH Royal Institute of Technology, Sweden ; South China Normal University, China.
    Pang, Xiaodan
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Ozolins, Oskars
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Udalcovs, Aleksejs
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Schatz, Richard
    KTH Royal Institute of Technology, Sweden.
    Guo, Changjian
    South China Normal University, China.
    Zhang, Junwei
    South China Normal University, China.
    Nordwall, Fredrik
    Tektronix AB, Sweden.
    Engenhardt, Klaus M.
    Tektronix GmbH, Germany.
    Westergren, Urban
    KTH Royal Institute of Technology, Sweden.
    Popov, Sergei
    KTH Royal Institute of Technology, Sweden.
    Jacobsen, Gunnar
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Xiao, Shilin
    Shanghai Jiao Tong University, China.
    Hu, Weisheng
    Shanghai Jiao Tong University, China.
    Chen, Jiajia
    KTH Royal Institute of Technology, Sweden ; South China Normal University, China.
    Nonlinearity-aware 200 Gbit/s DMT transmission for C-band short-reach optical interconnects with a single packaged electro-absorption modulated laser2018In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 43, no 2, p. 182-185Article in journal (Refereed)
    Abstract [en]

    We experimentally demonstrate the transmission of a 200 Gbit/s discrete multitone (DMT) at the soft forward error correction limit in an intensity-modulation direct-detection system with a single C-band packaged distributed feedback laser and traveling-wave electro absorption modulator (DFB-TWEAM), digital-to-analog converter and photodiode. The bit-power loaded DMT signal is transmitted over 1.6 km standard single-mode fiber with a net rate of 166.7 Gbit/s, achieving an effective electrical spectrum efficiency of 4.93 bit/s/Hz. Meanwhile, net rates of 174.2 Gbit/s and 179.5 Gbit/s are also demonstrated over 0.8 km SSMF and in an optical back-to-back case, respectively. The feature of the packaged DFB-TWEAM is presented. The nonlinearity-aware digital signal processing algorithm for channel equalization is mathematically described, which improves the signal-to-noise ratio up to 3.5 dB.

  • 30.
    Zhang, Lu
    et al.
    Shanghai Jiao Tong University, China ; KTH Royal Institute of Technology, Sweden.
    Pang, Xiaodan
    RISE - Research Institutes of Sweden, ICT, Acreo. KTH Royal Institute of Technology, Sweden.
    Ozolins, Oskars
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Udalcovs, Aleksejs
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Popov, Sergei
    KTH Royal Institute of Technology, Sweden.
    Xiao, Shilin
    Shanghai Jiao Tong University, China.
    Hu, Weisheng
    Shanghai Jiao Tong University, China.
    Chen, Jiajia
    KTH Royal Institute of Technology, Sweden ; South China Normal University, China.
    Spectrally efficient digitized radio-over-fiber system with k-means clustering-based multidimensional quantization2018In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 43, no 7, p. 1546-1549Article in journal (Refereed)
    Abstract [en]

    We propose a spectrally efficient digitized radio-over-fiber (D-RoF) system by grouping highly correlated neighboring samples of the analog signals into multidimensional vectors, where the k-means clustering algorithm is adopted for adaptive quantization. A 30 Gbit/s D-RoF system is experimentally demonstrated to validate the proposed scheme, reporting a carrier aggregation of up to 40 100 MHz orthogonal frequency division multiplexing (OFDM) channels with quadrate amplitude modulation (QAM) order of 4 and an aggregation of 10 100 MHz OFDM channels with a QAM order of 16384. The equivalent common public radio interface rates from 37 to 150 Gbit/s are supported. Besides, the error vector magnitude (EVM) of 8% is achieved with the number of quantization bits of 4, and the EVM can be further reduced to 1% by increasing the number of quantization bits to 7. Compared with conventional pulse coding modulation-based D-RoF systems, the proposed D-RoF system improves the signal-to-noise-ratio up to similar to 9 dB and greatly reduces the EVM, given the same number of quantization bits. (c) 2018 Optical Society of America

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