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Impact of In-Band Crosstalk due to Mixed Modulation Formats with Multiple Line Rates on Direct-Detection OFDM Optical Networks Performance

Rebola, J. ; Cartaxo, A.

Impact of In-Band Crosstalk due to Mixed Modulation Formats with Multiple Line Rates on Direct-Detection OFDM Optical Networks Performance, Proc International Conf. on Transparent Networks – ICTON , Graz, Austria, Vol. 1, pp. 1 - 1, July, 2014.

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Abstract
The impact of in-band crosstalk on direct-detection (DD) orthogonal frequency division multiplexing (OFDM) optical networks performance is assessed in a mixed modulation formats with multiple data rates scenario. It is shown that differential phase-modulated signals lead to the highest crosstalk penalty, among the DD modulation formats typically used in optical networks, with a lower crosstalk tolerance of 2.5 dB in comparison with OFDM and on-off keying interfering signals. We also show that single-sideband OFDM signals exhibit a 3 dB lower in-band crosstalk tolerance than double-sideband OFDM signals.