Magnus Karlsson

Li, Jianqiang; Tipsuwannakul, Ekawit; Eriksson, Tobias; Karlsson, Magnus; Andrekson, Peter: Approaching Nyquist Limit in WDM Systems by Low-Complexity Receiver-Side Duobinary Shaping. Journal of Lightwave Technology, 30 (11) pp. 1664 - 1676.

Li, Jianqiang; Sjödin, Martin; Karlsson, Magnus; Andrekson, Peter: Building up low-complexity spectrally-efficient Terabit superchannels by receiver-side duobinary shaping. Optics Express, 20 (9) pp. 10271-10282.

Li, Jianqiang; Tipsuwannakul, Ekawit; Karlsson, Magnus; Andrekson, Peter: Exploiting the Faster-Than-Nyquist Concept in Wavelength-Division Multiplexing Systems Using Duobinary Shaping. ZTE Communications, 10 (1) pp. 23-29.

Li, Jianqiang; Tipsuwannakul, Ekawit; Karlsson, Magnus; Andrekson, Peter: Low-Complexity Duobinary Signaling and Detection for Sensitivity Improvement in Nyquist-WDM Coherent System. Optical Fiber Communication Conference (OFC) Los Angeles California, March 4, 2012,

Lundström, Carl; Corcoran, Bill; Olsson, Samuel; Tong, Zhi; Karlsson, Magnus; Andrekson, Peter: Short-Pulse Amplification in a Phase-Sensitive Amplifier . Optical Fiber Communications Conference (OFC) 2012, Los Angeles, CA, (OTh1C.1)

Sjödin, Martin; Johannisson, Pontus; Li, Jianqiang; Agrell, Erik; Andrekson, Peter; Karlsson, Magnus: Comparison of 128-SP-QAM with PM-16-QAM. Optics Express, 20 pp. 8356-8366.

Sjödin, Martin; Puttnam, Benjamin; Johannisson, Pontus; Shinada, Satoshi; Wada, Naoya; Andrekson, Peter; Karlsson, Magnus: Comparison of PS-QPSK and PM-QPSK at Different Data Rates in a 25 GHz-spaced WDM System. Optical Fiber Communications Conference (OFC) 2012, Los Angeles,

Sjödin, Martin; Puttnam, Benjamin; Johannisson, Pontus; Shinada, Satoshi; Wada, Naoya; Andrekson, Peter; Karlsson, Magnus: Transmission of PM-QPSK and PS-QPSK with different fiber span lengths. Optics Express, 20 pp. 7544–7554.

Szczerba, Krzysztof; Westbergh, Petter; Karout, Johnny; Gustavsson, Johan; Haglund, Åsa; Karlsson, Magnus; Andrekson, Peter; Agrell, Erik; Larsson, Anders: 4-PAM for high-speed short-range optical communications. Journal of Lightwave Technology,

Tong, Zhi; Lundström, Carl; Andrekson, Peter; Karlsson, Magnus; Bogris, Adonis: Ultra-low-noise, Broadband Phase-Sensitive Optical Amplifiers and Their Applications. IEEE Journal of Selected Topics in Quantum Electronics (invited), 18 (2) pp. 1016-1032.

Agrell, Erik; Karlsson, Magnus: On the symbol error probability of regular polytopes. IEEE Transactions on Information Theory, 57 (6) pp. 3411-3415.

Beygi, Lotfollah; Agrell, Erik; Karlsson, Magnus: Optimization of 16-point Ring Constellations in the Presence of Nonlinear Phase Noise. Optical Fiber Communication Conference and Exposition (OFC) and The National Fiber Optic Engineers Conference (NFOEC), pp. OThO4.

Beygi, Lotfollah; Agrell, Erik; Karlsson, Magnus; Johannisson, Pontus: Signal Statistics in Fiber-Optical Channels with Polarization Multiplexing and Self-Phase Modulation. IEEE Journal of Lightwave Technology, 29 (16) pp. 2379 - 2386 .

Boulanger, B.; Cundiff, S. T.; Gauthier, D. J.; Karlsson, Magnus; Lu, Y. Q.; Norwood, R. A.; Skryabin, D.; Taira, T.: Focus issue introduction: nonlinear optics. Optics Express, 19 (23) pp. 23561-23566.

Jiang, Nan; Gong, Yan; Karout, Johnny; Wymeersch, Henk; Johannisson, Pontus; Karlsson, Magnus; Agrell, Erik; Andrekson, Peter: Stochastic Backpropagation for Coherent Optical Communications. European Conference and Exhibition on Optical Communication,

Johannisson, Pontus; Gosset, Christophe; Karlsson, Magnus: A Blind Phase Stabilization Algorithm for Parallel Coherent Receivers. Journal of Lightwave Technology, 29 (24) pp. 3737-3743.

Johannisson, Pontus; Sjödin, Martin; Karlsson, Magnus: A Modified CMA for PS-QPSK. Advanced Photonics, Signal Processing in Photonic Communications, pp. SPTuB3.

Johannisson, Pontus; Wymeersch, Henk; Sjödin, Martin; Tan, Ahmet Serdar; Agrell, Erik; Andrekson, Peter; Karlsson, Magnus: Convergence Comparison of the CMA and ICA for Blind Polarization Demultiplexing. Journal of Optical Communications and Networking, 3 (6) pp. 493-501.

Johannisson, Pontus; Sjödin, Martin; Karlsson, Magnus; Wymeersch, Henk; Agrell, Erik; Andrekson, Peter: Modified constant modulus algorithm for polarization-switched QPSK. Optics Express, 19 (8) pp. 7734-7741.

Karlsson, Magnus; Agrell, Erik: Generalized pulse-position modulation for optical power-efficient communication. 37th European Conference on Optical Communication and Exhibition, ECOC 2011, Geneva, 18 September 2011 through 22 September 2011, ISBN/ISSN: 978-155752931-2

Karlsson, Magnus; Agrell, Erik: Multilevel pulse-position modulation for optical power-efficient communication. Optics Express, 19 (26) pp. B799-B804.

Karlsson, Magnus; Agrell, Erik: Power efficient modulation schemes [Invited book chapter]. Impact of Nonlinearities on Fiber Optic Communication,

Karout, Johnny; Wymeersch, Henk; Tan, Ahmet Serdar; Johannisson, Pontus; Agrell, Erik; Sjödin, Martin; Karlsson, Magnus; Andrekson, Peter: CMA Misconvergence in Coherent Optical Communication for Signals Generated from a Single PRBS . Wireless & optical communications conference, New Jersey, 15-16 April 2011, ISBN/ISSN: 978-145770454-3

Karout, Johnny; Agrell, Erik; Szczerba, Krzysztof; Karlsson, Magnus: Designing Power-Efficient Modulation Formats for Noncoherent Optical Systems . Proc. IEEE Global Communications Conference (GlobeCom) [Best paper award], ISBN/ISSN: 978-1-4244-9268-8

Karout, Johnny; Agrell, Erik; Szczerba, Krzysztof; Karlsson, Magnus: Optimizing Constellations for Noncoherent Optical Communication Systems. submitted to IEEE Transactions on Information Theory, Jun. 2011.,

Lu, G. W.; Tipsuwannakul, Ekawit; Miyazaki, T.; Lundström, Carl; Karlsson, Magnus; Andrekson, Peter: Format Conversion of Optical Multilevel Signals Using FWM-Based Optical Phase Erasure. Journal of Lightwave Technology, 29 (16) pp. 2460-2466.

Lundström, Carl; Corcoran, Bill; Tong, Zhi; Karlsson, Magnus; Andrekson, Peter: Phase and Amplitude Transfer Functions of a Saturated Phase-Sensitive Parametric Amplifier. Proc. European Conference on Optical Communications (ECOC), Geneva, Switzerland, pp. Th.11.LeCervin.4.

Lundström, Carl; Tong, Zhi; Karlsson, Magnus; Andrekson, Peter: Phase-to-phase and phase-to-amplitude transfer characteristics of a nondegenerate-idler phase-sensitive amplifier. Optics Letters, 36 (22) pp. 4356-4358.

McKinstrie, C. J.; Alic, N.; Tong, Zhi; Karlsson, Magnus: Higher-capacity communication links based on two-mode phase-sensitive amplifiers. Optics Express, 19 (13) pp. 11977-11991.

Sjödin, Martin; Johannisson, Pontus; Wymeersch, Henk; Andrekson, Peter; Karlsson, Magnus: Comparison of polarization-switched QPSK and polarization-multiplexed QPSK at 30 Gbit/s. Optics Express, 19 (8) pp. 7839-7846.

Sjödin, Martin; Agrell, Erik; Johannisson, Pontus; Lu, Guo-Wei; Andrekson, Peter; Karlsson, Magnus: Filter Optimization for Self-Homodyne Coherent WDM Systems using Interleaved Polarization Division Multiplexing. Journal of Lightwave Technology, 29 (9) pp. 1219 - 1226.

Sjödin, Martin; Johannisson, Pontus; Andrekson, Peter; Karlsson, Magnus: Linear and Nonlinear Crosstalk Tolerance of Polarization-Switched QPSK and Polarization-Multiplexed QPSK. Proceedings of European Conference on Optical Communication, ECOC 2011, Geneva, Switzerland, September 18-22, 2011,

Sjödin, Martin; Wymeersch, Henk; Johannisson, Pontus; Karlsson, Magnus; Andrekson, Peter: Measurement of the Phase Noise Tracking Capability of a Digital Coherent Receiver. Proceedings of European Conference on Optical Communication, ECOC 2011, Geneva, Switzerland, September 18-22, 2011,

Szczerba, Krzysztof; Westbergh, Petter; Karout, Johnny; Gustavsson, Johan; Haglund, Åsa; Karlsson, Magnus; Andrekson, Peter; Agrell, Erik; Larsson, Anders: 30 Gbps 4-PAM transmission over 200m of MMF using an 850 nm VCSEL. Optics Express, 19 (26) pp. B203-B208.

Szczerba, Krzysztof; Westbergh, Petter; Gustavsson, Johan; Haglund, Åsa; Karout, Johnny; Karlsson, Magnus; Andrekson, Peter; Agrell, Erik; Larsson, Anders: 30 Gbps 4-PAM transmission over 200m of MMF using an 850 nm VCSEL. 2011 37th European Conference on Optical Comunication,

Szczerba, Krzysztof; Karout, Johnny; Agrell, Erik; Westbergh, Petter; Karlsson, Magnus; Andrekson, Peter; Larsson, Anders: Demonstration of 8-level subcarrier modulation sensitivity improvement in an IM/DD system. 2011 37th European Conference on Optical Comunication,

Szczerba, Krzysztof; Karout, Johnny; Westbergh, Petter; Agrell, Erik; Karlsson, Magnus; Andrekson, Peter; Larsson, Anders: Experimental comparison of modulation formats in IM/DD links. Optics Express, 19 (10) pp. 9881-9889.

Tan, Ahmet Serdar; Wymeersch, Henk; Johannisson, Pontus; Agrell, Erik; Andrekson, Peter; Karlsson, Magnus: An ML-based Detector for Optical Communication in the Presence of Nonlinear Phase Noise. IEEE International Conference on Communications (ICC), ISBN/ISSN: 978-1-61284-233-2

Tipsuwannakul, Ekawit; Karlsson, Magnus; Agrell, Erik; Andrekson, Peter: Performance Comparison between 120 Gbit/s RZ-DQP-ASK and RZ-D8PSK over a 480 km Link. Optical fiber communication conference, pp. OMI5.

Tipsuwannakul, Ekawit; Johannisson, Pontus; Sköld, Mats; Agrell, Erik; Karlsson, Magnus; Andrekson, Peter: Performance Comparison of Differential 8-Ary Modulation Formats in High-Speed Optical Transmission Systems. Journal of Lightwave Technology, 29 (19) pp. 2954-2962.

Tong, Zhi; Lundström, Carl; Karlsson, Magnus; Andrekson, Peter: Impact of Zero-Dispersion-Wavelength Distributions on the Noise Figure Nonreciprocity of a Fiber Parametric Amplifier. IEEE Photonics Technology Letters, 23 (6) pp. 365-367.

Tong, Zhi; Lundström, Carl; Karlsson, Magnus; Vasilyev, M.; Andrekson, Peter: Noise performance of a frequency nondegenerate phase-sensitive amplifier with unequalized inputs. Optics Letters, 36 (5) pp. 722-724.

Tong, Zhi; Lundström, Carl; Andrekson, Peter; McKinstrie, Colin; Karlsson, Magnus; Blessing, Daniel; Tipsuwannakul, Ekawit; Puttnam, Benjamin; Toda, Hiroyuki; Gruner-Nielsen, Lars: Towards the Ultra-Sensitive Optical Link Enabled by Low Noise Phase-Sensitive Amplifiers. Nature Photonics, 5 (7) pp. 430-436.

Alic, N.; Karlsson, Magnus; Sköld, Mats; Milenkovic, O.; Andrekson, Peter; Radic, S.: Joint Statistics and MLSD in Filtered Incoherent High-Speed Fiber-Optic Communications. Journal of Lightwave Technology, 28 (10) pp. 1564-1572.

Beygi, Lotfollah; Agrell, Erik; Johannisson, Pontus; Karlsson, Magnus: A novel multilevel coded modulation scheme for fiber optical channel with nonlinear phase noise. Proc. Global Communications Conference, Miami, FL,

Beygi, Lotfollah; Agrell, Erik; Karlsson, Magnus; Makki, Behrooz: A novel rate allocation method for multilevel coded modulation. International symposium on information theory, pp. 1983-1987 .

Beygi, Lotfollah; Agrell, Erik; Karlsson, Magnus: On the dimensionality of multilevel coded modulation in the high SNR regime. IEEE Communications Letters, 14 (11) pp. 1056-1058.

Chughtai, M.N.; Forzati, M.; Mårtensson, J.; Tipsuwannakul, Ekawit; Karlsson, Magnus: Analysis of non-linear impairments in 40 Gbaud PM DQPSK and D8PSK transmission. Transparent Optical Networks (ICTON), 2010 12th International Conference on, pp. 1 -4. ISBN/ISSN: 978-142447797-5

Coles, J. B.; Kuo, B. P.-P.; Alic, N.; Moro, S.; Bres, C.-S.; Boggio, J. M. Chavez; Andrekson, Peter; Karlsson, Magnus; Radic, S.: Bandwidth-efficient phase modulation techniques for Stimulated Brillouin Scattering suppression in fiber optic parametric amplifiers. Optics Express, 18 (17) pp. 18138-18150.

Gustavsson, Johan; Westbergh, Petter; Szczerba, Krzysztof; Haglund, Åsa; Larsson, Anders; Karlsson, Magnus; Andrekson, Peter; Hopfer, Friedhelm; Fiol, Gerrit; Bimberg, Dieter; Olsson, Bengt Erik; Kristiansson, Anna; Healy, Sorcha B.; O'Reilly, Eoin P.; Joel, Andrew: High-speed 850-nm VCSELs for 40 Gb/s transmission. Proceedings of SPIE - The International Society for Optical Engineering ; Semiconductor Lasers and Laser Dynamics IV; Brussels; 12 April 2010 through 16 April 2010, 7720 ISBN/ISSN: 978-081948193-1

Johannisson, Pontus; Sjödin, Martin; Karlsson, Magnus; Tipsuwannakul, Ekawit; Andrekson, Peter: Cancellation of Nonlinear Phase Distortion in Self-Homodyne Coherent Systems. IEEE Photonics Technology Letters, 22 (11) pp. 802-804.

Johannisson, Pontus; Wymeersch, Henk; Sjödin, Martin; Tan, Ahmet Serdar; Agrell, Erik; Andrekson, Peter; Karlsson, Magnus: Convergence Comparison of CMA and ICA for Blind Polarization Demultiplexing of QPSK and 16-QAM Signals. Proceedings of European Conference on Optical Communication, ECOC 2010, Turin, Italy, September 19-23, 2010, ISBN/ISSN: 978-142448535-2

Kakande, Joseph; Lundström, Carl; Andrekson, Peter; Tong, Zhi; Karlsson, Magnus; Petropoulos, Periklis; Parmigiani, Francesca; Richardson, David J.: Detailed characterization of a 
fiber-optic parametric amplifier in phase-sensitive and phase-insensitive operation. Optics Express, Vol. 18, Issue 5, pp. 4130-4137 , 18 (5) pp. 4130-4137.

Karlsson, Magnus; Agrell, Erik: Constellation optimization for coherent optical transmission systems. Proc. IEEE Photonics Society Annual Meeting, Denver, CO [Invited], pp. 152-153.

Karlsson, Magnus; Agrell, Erik: Four-Dimensional Optimized Constellations for Coherent Optical Transmission Systems. 36th European Conference on Optical Communication, Turin, Italy [Invited], pp. We.8.C.3. ISBN/ISSN: 978-142448535-2

Karlsson, Magnus: Impact of cross-phase modulation in coherent transmission systems. IEEE Photonics Society Summer Topical Meeting Series, 2010, pp. 127 -128.

Karout, Johnny; Agrell, Erik; Karlsson, Magnus: Power efficient subcarrier modulation for intensity modulated channels. Optics Express, 18 (17) pp. 17913-17921.

Khan, Fahd Ahmed; Agrell, Erik; Karlsson, Magnus: Electronic dispersion compensation by Hadamard transformation. Optical Fiber Communication Conference, San Diego, CA, pp. paper OWV4.

Lu, Guo-Wei; Tipsuwannakul, Ekawit; Lundström, Carl; Karlsson, Magnus; Andrekson, Peter: Format Conversion From 120-Gb/s RZ-D8PSK to 80-Gb/s RZ-DQPSK Through FWM-Based Optical Phase Erasure. IEEE Photonics Technology Letters, 22 (24) pp. 1817-1819.

Lundström, Carl; Puttnam, Benjamin J; Tong, Zhi; Karlsson, Magnus; Andrekson, Peter: Experimental Characterization of the Phase Squeezing Properties of a Phase-Sensitive Parametric Amplifier in Non-Degenerate Idler Configuration. Proc. European Conference on Optical Communications (ECOC), pp. Th.10.C.1. ISBN/ISSN: 978-142448535-2

McKinstrie, C. J.; Karlsson, Magnus; Tong, Zhi: Field-quadrature and photon-number correlations produced by parametric processes. Optics Express, 18 (19) pp. 19792-19823.

Peng, Fangrong; Wymeersch, Henk; Tan, Ahmet Serdar; Sjödin, Martin; Johannisson, Pontus; Agrell, Erik; Andrekson, Peter; Karlsson, Magnus: Operational Regime of Symbol-by-Symbol Phase Noise Estimation for POLMUX 16-QAM. Proceedings of European Conference on Optical Communication, ECOC, Turin, Italy, September 19-23, 2010, ISBN/ISSN: 978-142448535-2

Schiopu, Ionut Romeo; Schiopu, Paul; Karlsson, Magnus: Increasing up to 7 times the stability of passively mode-locked fiber ring laser by introducing in the cavity a certain length of dispersion compensating fiber. Proceedings of SPIE - The International Society for Optical Engineering; Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies V; Constanta; 26 August 2010 through 29 August 2010, 7821 pp. Article number 78210D . ISBN/ISSN: 978-081948330-0

Sjödin, Martin; Agrell, Erik; Lu, Guo-Wei; Johannisson, Pontus; Karlsson, Magnus; Andrekson, Peter: Interleaved Polarization Division Multiplexing in Self-Homodyne Coherent WDM Systems. Proceedings of European Conference on Optical Communication, ECOC 2010, Turin, Italy, September 19-23, 2010, ISBN/ISSN: 978-142448535-2

Sjödin, Martin; Johannisson, Pontus; Tong, Zhi; Karlsson, Magnus; Andrekson, Peter: OSNR Requirements for Self-Homodyne Coherent Systems. IEEE Photonics Technology Letters, 22 (2) pp. 91-93.

Szczerba, Krzysztof; Olsson, Bengt-Erik; Westbergh, Petter; Rhodin, Anna; Gustavsson, Johan; Haglund, Åsa; Karlsson, Magnus; Larsson, Anders; Andrekson, Peter: 37 Gbps transmission over 200 m of MMF using single cycle subcarrier modulation and a VCSEL with 20 GHz modulation bandwidth. 2010 36th European Conference and Exhibition on Optical Communication (ECOC), pp. 1-3. ISBN/ISSN: 978-1-4244-8534-5

Tan, Ahmet Serdar; Wymeersch, Henk; Johannisson, Pontus; Sjödin, Martin; Agrell, Erik; Andrekson, Peter; Karlsson, Magnus: The Impact of Self-Phase Modulation on Digital Clock Recovery in Coherent Optical Communication. Proceedings of European Conference on Optical Communication, ECOC 2010, Turin, Italy, September 19-23, 2010, ISBN/ISSN: 978-142448535-2

Tipsuwannakul, Ekawit; Niaz Chughtai, Mohsan; Forzati, Marco; Mårtensson, Jonas; Andrekson, Peter; Karlsson, Magnus: Influence of self- and cross-phase modulation on 40 Gbaud dual polarization DQPSK/D8PSK signals in 10 Gbit/s OOK WDM systems. Optics Express, 18 (23) pp. 24178-24188 .

Tipsuwannakul, Ekawit; Karlsson, Magnus; Andrekson, Peter: Investigation of Transmission Impairments of 40-Gbaud, Two-, Four-, and Eight-Level RZ-DPSK. IEEE Photonics Technology Letters, 22 (18) pp. 1376-1378.

Tipsuwannakul, Ekawit; Sköld, Mats; Karlsson, Magnus; Andrekson, Peter: Transmission of 240 Gb/s PM-RZ-D8PSK over 320 km in 10 Gb/s NRZ-OOK WDM System. OFC'2010, p. OMJ2,

Tong, Zhi; Bogris, Adonis; Karlsson, Magnus; Andrekson, Peter: Full Characterization of Noise Figure Spectrum in a Single Pumped Fiber Optical Parametric Amplifiers. OFC'2010, pp. OWT5.

Tong, Zhi; Bogris, A.; Karlsson, Magnus; Andrekson, Peter: Full characterization of the signal and idler noise figure spectra in single-pumped fiber optical parametric amplifiers. Optics Express, 18 (3) pp. 2884-2893.

Tong, Zhi; Bogris, Adonis; Lundström, Carl; McKinstrie, C. J.; Vasilyev, Michael; Karlsson, Magnus; Andrekson, Peter: Modeling and measurement of the noise figure of a cascaded non-degenerate phase-sensitive parametric amplifier. Optics Express, 18 (14) pp. 14820-14835.

Tong, Zhi; Bogris, Adonis; Lundström, Carl; McKinstrie, C. J.; Vasilyev, Michael; Karlsson, Magnus; Andrekson, Peter: Noise Figure Measurement in Phase-Insensitive and Phase-Sensitive Fiber Parametric Amplifier Cascade. OFC'2010, pp. OWT4.

Tong, Zhi; Lundström, Carl; Karlsson, Magnus; Andrekson, Peter: Noise Figure Non-reciprocity in Fiber Optical Parametric Amplifiers with Zero-Dispersion-Wavelength Variations. ECOC'10, European Conference on Optical Communication, ISBN/ISSN: 978-142448535-2

Tong, Zhi; McKinstrie, C. J.; Lundström, Carl; Karlsson, Magnus; Andrekson, Peter: Noise performance of optical fiber transmission links that use non-degenerate cascaded phase-sensitive amplifiers. Optics Express, 18 (15) pp. 15426-15439 .

Tong, Zhi; Lundström, Carl; Tipsuwannakul, Ekawit; Karlsson, Magnus; Andrekson, Peter: Phase-Sensitive Amplified DWDM DQPSK Signals Using Free-Running Lasers with 6-dB Link SNR Improvement over EDFA-based Systems. ECOC2010, PDP1.3, Post-deadline paper, ISBN/ISSN: 978-142448535-2

Tong, Zhi; Bogris, Adonis; Karlsson, Magnus; Andrekson, Peter: Raman-Induced Asymmetric Pump Noise Transfer in Fiber-Optical Parametric Amplifiers. IEEE Photonics Technology Letters, 22 (6) pp. 386-388.

Agrell, Erik; Karlsson, Magnus: Power-efficient modulation formats in coherent transmission systems. IEEE Journal of Lightwave Technology, 27 (22) pp. 5115-5126.

Alic, N.; Sköld, Mats; Andrekson, Peter; Karlsson, Magnus; Radic, S.: Benefits of Joint Statistics in MLSD-Equalized Transmission. IEEE Photonics Technology Letters, 21 (8) pp. 495-497.

Chavez-Boggio, J. M.; Moro, S.; Alic, N.; Radic, S.; Karlsson, Magnus; Bland-Hawthorn, J: Nearly octave-spanning cascaded four-wave-mixing generation in low dispersion highly nonlinear fiber. European Conference on Optical Communication, ECOC 2009, pp. paper 9.1.2.

Karlsson, Magnus; Agrell, Erik: Which is the most power-efficient modulation format in optical links?. Optics Express, 17 (13) pp. 10814-10819.

Lundström, Carl; Kakande, Joseph; Andrekson, Peter; Tong, Zhi; Karlsson, Magnus; Petropoulos, Periklis; Parmigiani, Francesca; Richardson, David J.: Experimental Comparison of Gain and Saturation Characteristics of a Parametric Amplifier in Phase-sensitive and Phase-insensitive Mode. European Conference on Optical Communication (ECOC) 2009, pp. Mo.1.1.1.

Myslivets, E.; Alic, N.; Moro, S.; Kuo, B.; Jopson, R. M.; McKinstrie, C. J.; Karlsson, Magnus; Radic, S.: 1.56-μs continuously tunable parametric delay line for a 40-Gb/s signal. Optics Express, 17 (14) pp. 11958-11964.

Myslivets, E.; Moro, S.; Kuo, B.; Jopson, R. M.; Gnauck, A; McKinstrie, C. J.; Radic, S.; Karlsson, Magnus: Continuously Tuneable 40-Gb/s Parametric 1.56 microsecond- Delay. European Conference on Optical Communication, ECOC 2009, pp. paper 9.1.1.

Schiopu, Ionut Romeo; Karlsson, Magnus; Westlund, Mathias; Schiopu, Carmen: A two paths mode-locked fiber laser. Proc. SPIE, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IV, 7297 (1) pp. 72971V.

Schiopu, Ionut Romeo; Karlsson, Magnus; Westlund, Mathias; Schiopu, Carmen: Experimental measuring of solitonic pulse stability for different configurations of the ring. Proc. SPIE, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IV, 7297 (1) pp. 72971O.

Sjödin, Martin; Johannisson, Pontus; Sköld, Mats; Karlsson, Magnus; Andrekson, Peter: Cancellation of SPM in Self-Homodyne Coherent Systems. Proceedings of European Conference on Optical Communication, ECOC 2009, Vienna, Austria, September 20-24, 2009, paper We8.4.5 ,

Sköld, Mats; Olsson, Bengt-Erik; Karlsson, Magnus; Andrekson, Peter: Low-Cost Multiparameter Optical Performance Monitoring Based on Polarization Modulation. Journal of Lightwave Technology, 27 (2) pp. 128-138.

Tipsuwannakul, Ekawit; Sköld, Mats; Karlsson, Magnus; Andrekson, Peter: Comparison of 112-Gb/s PM-RZ-DQPSK and PM-RZ-D8PSK in Terms of OSNR Requirement and Transmission Impairments. IEEE Photonics Technology Letters, 21 (22) pp. 1680 - 1682 .

Tong, Zhi; Lundström, Carl; Bogris, Adonis; Karlsson, Magnus; Andrekson, Peter; Syvridis, Dimitri: Measurement of Sub-1 dB Noise Figure in a Non-degenerate Cascaded Phase Sensitive Fibre Parametric Amplifier. Proceedings of ECOC 2009, pp. Mo. 1.1.2.

Zhao, Hongxia; Agrell, Erik; Karlsson, Magnus: Intersymbol interference in DQPSK fibre-optic systems. European Transactions on Telecommunications, 20 (8) pp. 758-769.

Karlsson, Magnus: Fiber optic parametric amplifiers - properties, applications and challenges. Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, CLEO 2008, pp. CWJ1.

Sköld, Mats; Yang, J.; Sunnerud, Henrik; Karlsson, Magnus; Oda, Shoichiro; Andrekson, Peter: Constellation diagram analysis of DPSK signal regeneration in a saturated parametric amplifier. Optics Express, 16 (9) pp. 5974-5982.

Sköld, Mats; Karlsson, Magnus; Oda, Shoichiro; Sunnerud, Henrik; Andrekson, Peter: Constellation diagram measurements of induced phase noise in a regenerating parametric amplifier. Optical Fiber Communication Conference 2008, pp. OML4.

Zhao, Hongxia; Agrell, Erik; Karlsson, Magnus: Trellis-Coded Modulation in Fiber-Optic Communications. Göteborg : Chalmers University of Technology.

Zhao, Hongxia; Agrell, Erik; Karlsson, Magnus: Unequal bit error probabiltiy in coherent QPSK fiber-optic systems using phase modulator based transmitters. European Transactions on Telecommunications, 19 (8) pp. 895-906 .

Kylemark, Per; Ren, J.; Myslivets, Y.; Alic, N.; Radic, S.; Andrekson, Peter; Karlsson, Magnus: Impact of Pump Phase-Modulation on the Bit-Error Rate in Fiber-Optical Parametric-Amplifier-Based Systems. IEEE Photonics Technology Letters, 19 (2) pp. 79-81.

Kylemark, Per; Ren, J.; Radic, S.; McKinstrie, C. J.; Karlsson, Magnus; Andrekson, Peter: Noise in Orthogonally Pumped Fiber-Optical Parametric Amplifiers. IEEE Photonics Technology Letters, 19 (2) pp. 88-90.

Kylemark, Per; Ren, J.; Karlsson, Magnus; Radic, S.; McKinstrie, C. J.; Andrekson, Peter: Noise in dual-pumped fiber-optical parametric amplifiers: Theory and experiments. Journal of Lightwave Technology, 25 (9) pp. 2837-2846.