Nielsen, M.L.M.L.NielsenMolle, L.L.MolleRichter, T.T.RichterSchubert, C.C.Schubert2022-03-122022-03-122013https://publica.fraunhofer.de/handle/publica/381045The feasibility of preamplifying a 100G DP-QPSK signal before coherent reception is investigated. A sensitivity improvement of 3 dB is found. Theoretically, there is another 5 dB of margin, and it is believed that several dBs can be gained through SOA optimization.en621conference paper