Ronald Freund, Matthias Seimetz, Lutz Molle, Tigran Baghdasaryan, Marco Forzati, Jonas Mårtensson , "Next generation optical networks based on higher-order modulation formats, coherent receivers and electronic distortion equalization", Proc. 3rd International Conference on Transparent Optical Networks (ICTON 2009), 10-12 December 2009, Angers, France

J. Hilt, M. Seimetz, L. Molle, R. Freund, "High-Speed FPGA Implementation of Feed-Forward Phase Estimation Algorithms", Workshop der ITG Fachgruppe 5.3.1,Modellierung photonischer Komponenten und Systeme, 12-13 November 2009, Berlin, Germany

A. Hachmeister, M. Rohde, R. Freund, "Long Haul WDM Transmission of Optical Minimum Shift Keying Format with Narrow Channel Spacing", Proc. Asia Communications and Photonics Conference and Exhibition (ACCP 2009), 2-6 November 2009, Shanghai, China

M. Nölle, D. Gross, L. Molle, R. Freund, "WDM Performance of Spectral Efficient Coherent OFDM", Workshop der ITG Fachgruppe 5.3.1,Modellierung photonischer Komponenten und Systeme, 12-13 November 2009, Berlin, Germany

W. Sohler, D. Büchter, L. Gui, H. Herrmann, H. Hu, H. Hu, R. Ludwig, R. Nouroozi, V. Quiring, R. Ricken, C. Schubert and H. Suche, "Wavelength Conversion and Optical Signal Processing in PPLN Waveguides", Asia Communications and Photonics Conference and Exhibition (ACP), Nov. 2-6, 2009, Shanghai, China, paper ThN1

H. Zhang, C. Schmidt-Langhorst, W. Zhao and C. Schubert, "Mitigation of Sampling Clock Drift in Asynchronously Under-Sampled Optical Bit Pattern Monitoring", Asia Communications and Photonics Conference and Exhibition (ACP), Nov. 2-6, 2009, Shanghai (China), paper TuE6; Proc. SPIE 7632, 763205 (2009)

M. Nölle, M. Seimetz, E. Patzak, "System Performance of High-Order Optical DPSK and Star QAM Modulation for Direct Detection Analyzed by Semi-Analytical BER Estimation", IEEE Journal of Lightwave Technology, Vol. 27, No. 19, pp. 4319-4329, October 2009

J. Vučić, C. Kottke, S. Nerreter, A. Büttner, K.-D. Langer, J. W. Walewski, "White light wireless transmission at 200+ Mb/s net data rate by use of discrete-multitone modulation", IEEE Photonics Technology Letters, Vol. 21, No. 20, 2009, pp. 1511-1513

G. G. Mekonnen, H.-G. Bach, R. Kunkel, C. Schubert, D. Pech, T. Rosin, A. Konczykowska, F. Jorge, A. Scavennec, and M. Riet, "Hybrid Co-Packaged Receiver Module with pin-Photodiode Chip and DEMUX-IC for 107 Gb/s Data Rates", Proc. 35th European Conference on Optical Communication (ECOC), September 20-24, 2009, Vienna (AT), Th9.2.6

H.-G. Bach, R. Kunkel, G.G. Mekonnen, R. Zhang, A. Sigmund, D. Schmidt, C. Sakkas, D. Pech, C. Schubert, "Novel 107 Gb/s Bias-Feeding Photodetector OEIC for Efficient Low-Cost Photoreceiver Co-Packaging", Proc. 35th European Conference on Optical Communication (ECOC), September 20-24, 2009, Vienna (AT), postdeadline paper PD1.8

C. Schmidt-Langhorst, C. Meuer, R. Ludwig, D. Puris, R. Bonk, T. Vallaitis, D. Bimberg, K. Petermann, J. Leuthold and C. Schubert, "Quantum-Dot Semiconductor Optical Booster Amplifier with Ultrafast Gain Recovery for Pattern-Effect Free Amplification of 80 Gb/s RZ-OOK Data Signals", Proc. 35th European Conference on Optical Communication (ECOC), September 20-24, 2009, Vienna (AT), paper We6.2.1

F. Futami, R. Okabe, T. Kato, C. Schmidt-Langhorst, C. Schubert, R. Ludwig, and S. Watanabe, "All-optical Combination of DPSK and OOK to 320-Gb/s DQPSK Signal Using Fiber-based Signal Processors", Proc. 35th European Conference on Optical Communication (ECOC), September 20-24, 2009, Vienna (AT), Tu4.3.1

Anagnostis Paraskevopoulos, Jelena Vučić, Sven-Hendrik Voß, Klaus-Dieter Langer, "Optical free-space communication systems in the Mbps to Gbps range, suitable for industrial applications", Proceedings, ISOT 2009 (International Symposium on Optomechatronic Technologies 21-23 September 2009, Istanbul,TURKEY)

Thomas Richter, Robert Elschner, Colja Schubert, Klaus Petermann, "Fibre-Based Parametric Wavelength Conversion of 86 Gb/s RZ-DQPSK Signals with 15 dB Gain Using a Dual-Pump Configuration", Proc. 35th European Conference on Optical Communication (ECOC), September 20-24, 2009, Vienna (AT), paper 3.3.2

R. Ludwig, A. Matiss, H.-G. Bach, L. Molle, C.C. Leonhardt, R. Kunkel, D. Schmidt, "Coherent Detection of a 50 Gb/s QPSK Signal Using an InP 90° Hybrid Monolithically Integrated with Balanced Photodetectors", Proc. 35th European Conference on Optical Communication (ECOC), September 20-24, 2009, Vienna (AT), paper P3.2

M. L. Nielsen, A. G. Steffan, G. Tsianos, G. Unterbörsch, A. Umbach, R. Ludwig, A. Boutin, L. Fulop, F. Verluise, "Investigation of DGD and Delay-Line Interferometer Phase Tolerance of Integrated Receiver Module for 86 Gb/s NRZ-DQPSK modulation", Proc. 35th European Conference on Optical Communication (ECOC), September 20-24, 2009, Vienna (AT), Th9.2.7

M. Seimetz, "High Spectral Efficiency Phase and Quadrature Amplitude Modulation for Optical Fiber Transmission – Configurations, Trends, and Reach", Proc.European Conference on Optical Communication (ECOC 2009), Vienna, Austria, 2009, paper 8.4.3

Sven-Hendrik Voß, Michael Schüler, Anagnostis Paraskevopoulos, "Using FPGA Technology and Optical Links to solve the I/O bottleneck challenges in modern communication systems", ORT 2009 (Optics in Computing Workshop, ECOC 2009, September 20-24, 2009, Vienna)

Thomas Richter, Robert Elschner, Klaus Petermann, Colja Schubert, , "Tolerances of Counterphased Pump-Phase Modulation in a Fibre-Based Dual-Pump Wavelength Converter for 86 Gb/s RZ-DQPSK", International Conference on Photonics in Switching (PiS), September 15-19, 2009, Pisa (Italy), paper FrI1-3

Robert Elschner, Thomas Richter, Klaus Petermann, "Impact of Pump-Phase Modulation on Fibre-Based Parametric Wavelength Conversion of Coherently Detected PSK Signals", International Conference on Photonics in Switching (PiS), September 15-19, 2009, Pisa (Italy), paper FrI1-5

Gerad Kuyt, Pieter Matthijsse, Denis Molin, Christoph Caspar, Ronald Freund , "Tests reveal importance of transceiver characteristics on OM-4 link performance", LIGHTWAVE, Vol. 26, No. 9, September 2009, pp. 7-13

J. Vučić, C. Kottke, S. Nerreter, K. Habel, A. Büttner, K.-D. Langer and J. W. Walewski, "125 Mbit/s over 5 m wireless distance by use of OOK-modulated phosphorescent white LEDs", Proc. ECOC 2009, Paper 9.6.4.

R. Ludwig, "Ultrafast transmission systems using coherent technology", Proc. 4th International Symposium on Ultrafast Photonic Technologies (ISUPT), August 4-5, 2009, RIEC Tohoku University, Sendai (Japan)

Carsten Schmidt-Langhorst, "Future Trends in Fiber-Optic Communication Networks", International Nano-Optoelectronic Workshop (iNOW), 04.08.2009, Stockholm, invited speaker

R. Freund, D.-D. Groß, R. Ludwig, C. Schmidt-Langhorst, "1.28 Tb/s Single Wavelength Star-16-QAM Transmission over up to 800 m of Graded-Index Multimode Fibre", Proc. 14th OptoElectronics and Communications Conference (OECC 2009), 13-17 July 2009, Hong Kong (China), postdeadline paper ThPD7

R. Freund, H. Louchet, M. Gruner, L. Molle, M. Seimetz, A. Richter, "80 Gbit/s/Channel Polarization Multiplexed Star-16QAM WDM Transmission over 720 km SSMF with Electronic Distortion Equalization", Proc. 14th OptoElectronics and Communications Conference (OECC 2009), 13-17 July 2009, Hong Kong, China

R. Freund, H. Louchet, M. Gruner, L. Molle, M. Seimetz, A. Richter, "80 Gbit/s/Channel Polarization Multiplexed Star-16QAM WDM Transmission over 720 km SSMF with Electronic Distortion Equalization", Proc. 14th Opto Electronics and Communications Conference (OECC 2009), 13-17 July 2009, Hongkong, China

Shigeki Watanabe, Fumio Futami, Ryo Okabe, Tomoyuki Kato, Reinhold Ludwig, Carsten Schmidt-Langhorst, Colja Schubert, "Polarization-Independent All-optical Amplitude Limiter using Two-stage Gain-saturated Fiber Parametric Amplifiers", Proc. 14th Opto Electronics and Communications Conference (OECC 2009), 13-17 July 2009, Hongkong, China

G. Gavioli, E. Torrengo, G. Bosco, A. Carena, V. Curri, V. Miot, P. Poggiolini, M. Belmonte, A. Guglierame, A. Brinciotti, A. La Porta, F. Forghieri, C. Muzio, G. Osnago, S. Piciaccia, C. Lezzi, L. Molle, R. Freund, "100Gb/s WDM NRZ-PM-QPSK Long-Haul Transmission Experiment over Installed Fiber Probing Non-Linear Reach With and Without DCUs", submitted to Proc. 35th European Conference on Optical Communication (ECOC), September 20-24, 2009, Vienna (AT)

Lutz Molle , Matthias Seimetz, Dirk-Daniel Gross, Ronald Freund, Michael Rohde, "Polarization Multiplexed 20 Gbaud Square 16QAM Long-Haul Transmission over 1120 km using EDFA Amplification", in Proc. 35th European Conference on Optical Communication (ECOC), number 8.4.4, September 20-24, 2009, Vienna (AT)

M. Seimetz, "Höherwertige Modulationsverfahren in der optischen Glasfaserübertragungstechnik", NTZ, Fachzeitung für Informations- und Kommunikationstechnik, Teil 2: Heft 7/2009, 2009

K.-D. Langer, J. Vučić, C. Kottke, L. Fernández del Rosal, S. Nerreter, J. Walewski , "Advances and prospects in high-speed information broadcast", Proc. ICTON 2009, Paper Mo.B5.3, 2009

D.C. O’Brien, L. Zeng, H. Le-Minh, G. Faulkner, O. Bouchet, S. Randel, J. Walewski, J.A. R. Borges, K.-D. Langer, J. Grubor, K. Lee and E.T. Won, "Visible Light Communications", In R. Kraemer, M.D. Katz (Eds.): Short-range wireless communications, pp.329-342, Wiley & Sons Ltd.

Josep M. Fabrega, Josep Prat, L. Molle, R. Freund, "Design of a wavelength control for coherent detection of high order modulation formats", submitted to Proc. International Conference on Transparent Optical Networks - ICTON, June 28 - July 2, 2009 - Island of São Miguel, Azores, Portugal, paper WEP21

M. Seimetz, "Höherwertige Modulationsverfahren in der optischen Glasfaserübertragungstechnik", NTZ, Fachzeitung für Informations- und Kommunikationstechnik, Teil 1: Heft 6/2009, pp. 34-36, 2009

C. Schmidt-Langhorst, R. Ludwig, H. Hu and C. Schubert, "1 Tb/s Transmission on a Single Wavelength Channel", Proc 10. ITG-Fachtagung Photonische Netze, May 4-5, 2009, Leipzig (DE)

Carl M. Weinert, Ronald Freund, Dirk Giggenbach, Nicolas Perlot, "Hochbitratige optische Übertragung für die Satellitenkommunikation", ITG Fachtagung „Photonische Netze“, 4.5.- 5.5.2009, Leipzig

Wenda Ni, Michael Schlosser, Hanyi Zhang, "Backup Path Reprovisioning and Activation Planning with Differentiated Dual-Failure Restorability in WDM Mesh Networks", 10. ITG-Fachtagung Photonische Netze, 2009

M. Seimetz, "Höherwertige Modulationsverfahren für die Glasfaserübertragung - Systemkonfigurationen und Performance-Trends", Tagungsband der 10. ITG-Fachtagung Photonische Netze, Leipzig, 4./5. Mai 2009

C. Schubert, R.E. Makon, A.G. Steffan, R. Driad, R. Ludwig and C. Schmidt-Langhorst, "Characterization of an InP-based Electrical 1:2 Demultiplexer in a 107 Gb/s OOK System", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA), paper OThE3

H. Hu, H. Suche, R. Ludwig, B. Huettl, C. Schmidt-Langhorst, R. Nouroozi, W. Sohler and C. Schubert, "Polarization insensitive all-optical wavelength conversion of 320 Gb/s RZ-DQPSK signals", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA), paper OThS6

C. Schmidt-Langhorst, R. Ludwig, D.-D. Groß, L. Molle, M. Seimetz, R. Freund and C. Schubert, "Generation and Coherent Time-Division Demultiplexing of up to 5.1 Tb/s Single-Channel 8-PSK and 16-QAM Signals", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA), post-deadine paper PDPC6

C. Schmidt-Langhorst, R. Ludwig, H. Hu and C. Schubert, "Single-Channel 1-Tb/s Transmission over 480 km DMF for Future Terabit Ethernet Systems", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA), paper OTuN5

M. Kroh, G. Unterbörsch, G. Tsianos, R. Ziegler, A.G. Steffan, H.-G. Bach, J. Kreissl, R. Kunkel, G.G. Mekonnen, W. Rehbein, D. Schmidt, R. Ludwig, K. Petermann, J. Bruns, T. Mitze, K. Voigt, L. Zimmermann, "Hybrid Integrated 40 Gb/s DPSK Receiver on SOI", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA), paper OMK3

R. Freund, "High-speed transmission in multimode fibres", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA), Tutorial M. Seimetz, "System Degradation by the SPM-Induced Mean Nonlinear Phase Shift in Optical QAM Transmission", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA), paper JWA38

M. Seimetz, L. Molle, M. Gruner, D.-D. Groß, R. Freund, "Transmission Reach Attainable for Single-Polarization and PolMux Coherent Star 16QAM Systems in Comparison to 8PSK and QPSK at 10Gbaud", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA), paper OTuN2

M. Seimetz, M. Nölle, C.-M. Weinert, R. Freund, B. Spinnler, S. Spälter, C. R. S. Fludger, "Influence of Neighbor Channel Modulation Formats on 112 Gbit/s and 42.8 Gbit/s WDM Coherent Polmux-QPSK Transmission Systems", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA), paper JThA44

M. Nölle, R. Freund, "Comparison of 30 Gbit/s Coherent 8PSK Single Carrier and OFDM Multi Carrier Systems with Respect to Transmission Reach", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA), paper JTHA43

Wenda Ni, Chunlei Zhu, Yabin Ye, Michael Schlosser, Hanyi Zhang, "Reducing Burst Loss Probability in Multi-Class Optical Burst Switching Networks by Successive Minimal Incremental Routing", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA)

Leonardo D. Coelho, Lutz Molle, Dirk Gross, Norbert Hanik, Ronald Freund, Christoph Caspar, Ernst-Dieter Schmidt, Bernhard Spinnler, "Modeling nonlinear phase noise in differentially phase-modulated optical communication systems", Optics Express, 2 March 2009, Vol. 17, No. 5, pp.3226-3241

A. Paraskevopoulos*, S.-H. Voss, M. Talmi, G. Walf, "Scalable (24 – 140 Gbps) optical data link, well adapted for future maskless lithography applications", Proceedings, SPIE Advanced Lithography Conference 2009, 26-27 February 2009, San Jose, USA

Heinz-Gunter Bach, Giorgis Gebre Mekonnen, Reinhard Kunkel, Colja Schubert, Detlef Pech, Thomas Rosin, Agnieszka Konczykowska, Filipe Jorge, Andre Scavennec, Muriel Riet, "107 Gbit/s Demultiplexing Photoreceivers Comprising pin and pinTWA Frontends", Proc. Optical Fiber Communication Conference (OFC 2009), 22-26 March 2009, San Diego, California (USA), paper OMK2

A. Paraskevopoulos*, S.-H. Voss, M. Talmi, G. Walf, "High speed (>100 Gbps) key components for a scalable optical data link, to be implemented in future maskless lithography applications", Proceedings, EMLC 2009 (The 25th European Mask and Lithography Conference EMLC 2009, January 12 - 15, 2009, Hilton Hotel, Dresden, Germany,

C.Arellano, K.-D. Langer, and J. Prat, "Reflections and Multiple Rayleigh Backscattering in WDM Single-Fiber Loopback Access Networks", Journal of Lightwave Technology, vol. 27, No. 1, pp.12-18, 2009.

I. Papagiannakis, D. Klonidis, V. Curri, P. Poggiolini, G. Bosco, R.I. Killey, M. Omella, J. Prat, D. Fonseca, A. Teixeira, R. Freund, E. Grivas, A. Bogris, A.N. Birbas, and I. Tomkos, "Electronic Distortion Compensation in the Mitigation of Optical Transmission Impairments: The view of JP-E ePhoton/ONe+ project", Journal of Optoelectronics IET

M. Seimetz, "High-Order Modulation for Optical Fiber Transmission", Springer Series in Optical Sciences, Vol. 143, ISBN 978-3-540-93770-8, Springer, 2009.