@inproceedingsPfau_Peveling_Hoffinann_Bhandarel_Ibrahim_Sandel_Adamczyk_Porrmann_Noé_Achiam_et al._2007, title=PDL-tolerant real-time polarization-multiplexed QPSK transmission with digital coherent polarization diversity receiver, DOI=10.1109/LEOSST.2007.4288309, booktitle=2007 DIGEST OF THE LEOS SUMMER TOPICAL MEETINGS, author=Pfau, T. and Peveling, R. and Hoffinann, S. and Bhandarel, S. and Ibrahim, S. and Sandel, D. and Adamczyk, O. and Porrmann, M. and Noé, Reinhold and Achiam, Y. and et al., year=2007, pages=17+ 
LibreCat: /record/38480
DOI: 10.1109/LEOSST.2007.4288309

@inproceedingsPfau_Adamezyk_Herath_Peveling_Hoffmann_Porrmann_Noé_2007, title=Realtime optical synchronous QPSK transmission with DFB lasers, DOI=10.1109/LEOSST.2007.4288308, booktitle=2007 DIGEST OF THE LEOS SUMMER TOPICAL MEETINGS, author=Pfau, T. and Adamezyk, O. and Herath, V. and Peveling, R. and Hoffmann, S. and Porrmann, M. and Noé, Reinhold, year=2007, pages=15–16 
LibreCat: /record/38429
DOI: 10.1109/LEOSST.2007.4288308