Publications

T. Kupfer, C. Dorschky, M. Ene, S. Langenbach
"Measurement of the Performance of 16-States MLSE Digital Equalizer with Different Optical Modulation Formats"
OFC 2008 Post-deadline paper PDP13, San Diego, CA, USA
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T. Duthel, C. Fludger1,  J. Geyer, C. Schulien
"Impact of Polarisation Dependent Loss on Coherent POLMUX-NRZ-DQPSK"
OFC 2008 paper OThU5, San Diego, CA, USA.
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F. N. Hauskel, J. Geyer, M. Kuschnerov, K. Piyawanno, T. Duthel, C. Fludger, D. van den Borne, E.-D. Schmidt, B. Spinnler, H. de Waardt, B. Lankl
"Optical Performance Monitoring from FIR Filter Coefficients in Coherent Receivers"
OFC 2008 paper OThW2, San Diego, CA, USA.
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S. Langenbach, G. Bosco, P. Poggiolini, T.Kupfer
"Parametric versus Non-Parametric Branch Metrics for MLSE based Receivers with ADC and Clock Recovery"
OFC 2008 paper JThA60, San Diego, CA, USA.
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T. Kupfer, S. Langenbach, N. Stojanovic, S. Gehrke, J. Whiteaway
"Performance of MLSE in Optical Communication Systems" 
ECOC 2007 invited paper 9.1.1, Berlin, Germany.
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T. Duthel, C. Fludger, D. van den Borne, C. Schulien, E-D. Schmidt, T. Wuth, E. de Man, G. D. Khoe, H. de Waardt
"Impairment tolerance of 111Gbit/s POLMUX-RZ-DQPSK using a reduced complexity coherent receiver with a T-spaced qualiser"
ECOC 2007 paper 1.3.2, Berlin, Germany.
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C. Fludger, A. Voss, T. Duthel, C. Schulien, B. Schmauss
"Characterisation of an RZ-DQPSK transmitter using coherent detection"
ECOC 2007 paper P069, Berlin, Germany.
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C. Fludger, T. Duthel, C. Schulien
“Towards Robust 100GE Transmission”
LEOS 2007 invited paper Paper ME1.2, Portland, USA.
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J. Whiteaway, C. Fludger, S. Langenbach, T. Kupfer
"Review of Recent Progress in MLSE Receiver Technologies"
LEOS 2007 invited paper Paper TuA1.1, Portland, USA.
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C. Fludger, T. Duthel, D. van den Borne, C. Schulien, E-D. Schmidt, T. Wuth, E. de Man, G. D. Khoe, H. de Waardt
“10 x 111 Gbit/s, 50 GHz spaced, POLMUX-RZ-DQPSK transmission over 2375 km employing coherent equalisation”
OFC2007 Post-deadline paper PDP22. Anaheim, USA.
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T.Kupfer, J. Whiteaway, S. Langenbach
"PMD Compensation using Electronic Equalization particular Maximum Likelihood Sequence Estimation"
OFC 2007 invited paper, Anaheim, USA.
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C. Fludger, T. Duthel, T. Wuth, C. Schulien 
“Uncompensated Transmission of 86Gbit/s Polarization Multiplexed RZ-QPSK over 100km of NDSF Employing Coherent Equalisation”
ECOC2006 Post-deadline paper Th4.3.3. Cannes France
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N. Stojanovic, C. Dorschky, T. Kupfer
"Enhanced Equalization and Clock Recovery Concepts"
ITG 3.5.1 Workshop, 17/18 November 2005, Berlin
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A. Färbert, S. Langenbach, N. Stojanovic, C. Dorschky, T. Kupfer, C. Schulien, J.-P. Elbers, H. Wernz, H. Griesser, C. Glingener,
"Performance of a 10.7 Gb/s Receiver with Digital Equaliser
using Maximum Likelihood Sequence Estimation" ECOC'2004, Proceedings PD-Th4.1.5, Stockholm (2004)
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M. Reinhold, T. Winkler-von-Mohrenfels, F. Kunz, E. Rose, A. Eismann, M. Kukiela, C. Wolf, F. Znidarsic, C. Dorschky, G. Röll, "A 40/43-Gb/s CDR/DEMUX and MUX chipset integrated on a MCM-ceramic with 3R-regeneration functionality", IMS'2003 accepted
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A. Färbert, T. Kupfer, C. Schulien, "Requirements for flexible 40 Gb/s Interfaces", LEOS'2002, Proceedings TuY2 (invited), vol.1, pp. 313, Glasgow (2002)
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W. Kaiser, S. Otte, T. Wuth and W. Rosenkranz, "Experimental verification of reduced sensitivity of optical duobinary modulation to higher order PMD", OFC'2002, Proceedings TuI5, Los Angeles (2002)
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W. Kaiser, A. Ehrhardt, W. Rosenkranz, N. Hanik, "Field trial of optical duobinary transmission over 1720 km at 10 Gb/s", ECOC'2002, Proceedings P3.3, Copenhagen (2002)
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