SAN extension testbed within the global seamless networks demonstrator. - Thomas Kessler; Armin Ehrhardt; Axel Weber (TRIDENTCOM, 2006)

Evolution of Terrestrial Optical System and Core Network Architecture. - Andreas Gladisch; Ralf-Peter Braun; Dirk Breuer; Armin Ehrhardt; Hans-Martin Foisel; Monika Jaeger; Ralph Leppla; Malte Schneiders; Sascha Vorbeck; Werner Weiershausen; Fritz-Joachim Westphal (Proc. IEEE, 2006)

Experimental Investigation of Real Time 10 Gbit/s MLSE Equalizer Using 4-States and 16-States Viterbi Detector. - Daniel Fritzsche; Dirk Breuer; Lars Schürer; Armin Ehrhardt; Hamdi Oeruen; Christian G. Schäffer (GLOBECOM, 2009)

Characterisation of the PMD Distribution along Optical Fibres and Improvement of the Backbone Fibre Infrastructure by a POTDR. - Armin Ehrhardt; Daniel Fritzsche; Manuel Paul; Lars Schürer; Dirk Breuer; Werner Weiershausen; Volker Fürst; Normand Cyr; Hongxin Chen; Gregory W. Schinn (J. Networks, 2010)

Decrease of the Link PMD by Fiber Exchange and Investigation of the PMD Distribution along Buried Optical Fibers with a POTDR. - Armin Ehrhardt; Manuel Paul; Lars Schürer; Christoph Gerlach; Wolfgang Krönert; Daniel Fritzsche; Dirk Breuer; Volker Fürst; Normand Cyr; Hongxin Chen; Gregory W. Schinn (J. Networks, 2010)

ONT reflection for additional maintenance by OTDR-measurements in FTTH networks. - Armin Ehrhardt; Lars Schürer; Frank Escher; Bjoern Nagel; Hans-Martin Foisel (OFC/NFOEC, 2013)

High-speed networks in field operation: An operator's view. - Armin Ehrhardt; Werner Weiershausen; Matthias Gunkel; Arnold Mattheus (ECOC, 2015)