Slip-reduced carrier phase estimation for coherent transmission in the presence of non-linear phase noise. - Andreas Bisplinghoff; C. Vogel; Theo Kupfer; Stefan Langenbach; Bernhard Schmauss (OFC/NFOEC, 2013)

Jitter tolerant clock recovery for coherent optical receivers. - C. R. S. Fludger; Thomas Duthel; Peter Hermann; Theo Kupfer (OFC/NFOEC, 2013)

Cycle slip tolerant hybrid turbo differential decoding. - Andreas Bisplinghoff; Stefan Langenbach; N. Beck; C. R. S. Fludger; Theodor Kupfer; C. Schulien (ECOC, 2014)

Time-division hybrid modulation formats: Tx operation strategies and countermeasures to nonlinear propagation. - Vittorio Curri; Andrea Carena; Pierluigi Poggiolini; R. Cigliutti; Fabrizio Forghieri; Chris Fludger; Theo Kupfer (OFC, 2014)

Challenges with pluggable optical modules for coherent optical communication systems. - Thomas Duthel; Peter Hermann; Timo Winkler von Mohrenfels; James Whiteaway; Theo Kupfer (OFC, 2014)

Experimental measurements of the impact of multi-path interference on PAM signals. - C. R. S. Fludger; Marco Mazzini; Theo Kupfer; Matt Traverso (OFC, 2014)

Cycle slip tolerant, differential encoding aware soft-decision FEC. - Andreas Bisplinghoff; Stefan Langenbach; Eliana Silvia Vercelli; Rosanna Pastorelli; Theo Kupfer (OFC, 2015)

Impact of pluggable analog coherent optics modules on line card architecture and DSP functionality. - Thomas Duthel; James E. A. Whiteaway; Theodor Kupfer (OFC, 2015)

Phase slip tolerant, low power multi-level coding for 64QAM with 12.9 dB NCG. - Andreas Bisplinghoff; Nina Beck; Marius Ovidiu Ene; Matthias Danninger; Theo Kupfer (OFC, 2016)

1Tb/s real-time 4×40Gbaud DP-16QAM superchannel using CFP2-ACO pluggables over 625 km of standard fibre. - C. R. S. Fludger; Eliana Silvia Vercelli; G. Marenco; A. Delia Torre; Thomas Duthel; Theo Kupfer (OFC, 2016)

Low cost transmitter self-calibration of time delay and frequency response for high baud-rate QAM transceivers. - C. R. S. Fludger; Thomas Duthel; Peter Hermann; Theo Kupfer (OFC, 2017)

Optimizing power consumption of a coherent DSP for metro and data center interconnects. - Theo Kupfer; Andreas Bisplinghoff; Thomas Duthel; Chris Fludger; Stefan Langenbach (OFC, 2017)

Application Aware Forward Error Correction Design. - Andreas Bisplinghoff; Stefan Langenbach; Theodor Kupfer (ECOC, 2021)