Elschner, R.R.ElschnerRichter, T.T.RichterKato, T.T.KatoWatanabe, S.S.WatanabeSchubert, C.C.Schubert2022-03-042022-03-042013https://publica.fraunhofer.de/handle/publica/23185610.1109/JLT.2012.2229259We extend our investigations on a recently proposed concept for distributed coherent optical orthogonal frequency-division multiplexing (CO-OFDM) by fiber-frequency conversion for locally defined exact channel mapping based on free-running lasers. Experiments with quadrature phase-shift keying and 16-quadrature amplitude modulation subchannels show error-free performance and are compared to experiments with locally generated CO-OFDM.en621535journal article