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Study on cross-phase modulation (XPM) effect on amplitude and differentially phase-modulated multilevel signals in DWDM transmission

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4 Author(s)
Kikuchi, N. ; Central Res. Lab., Hitachi Ltd., Tokyo, Japan ; Sekine, Kenro ; Sasaki, S. ; Sugawara, T.

The characteristic degradation mechanism of the cross-phase modulation (XPM) effect on multilevel amplitude and differentially phase-shift keying (APSK) signals in dense wavelength-division-multiplexing (DWDM) transmissions is analyzed and experimentally investigated, for the first time. Based on the results, we successfully demonstrate a 0.48-Tb/s (30-Gb/s/ch) 50-GHz-spaced 16-channel DWDM 160-km unrepeatered transmission of eight-level APSK signals suppressing the XPM-induced degradation.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 7 )