Title :
Kerr Nonlinearity Mitigation: Mid-Link Spectral Inversion Versus Digital Backpropagation in 5×28-GBd PDM 16-QAM Signal Transmission
Author :
Sackey, Isaac ; Da Ros, Francesco ; Fischer, Johannes Karl ; Richter, Thomas ; Jazayerifar, Mahmoud ; Peucheret, Christophe ; Petermann, Klaus ; Schubert, Colja
Author_Institution :
Fachgebiet Hochfrequenztech., Tech. Univ. Berlin, Berlin, Germany
Abstract :
We experimentally investigate Kerr nonlinearity mitigation of a 28-GBd polarization-multiplexed 16-QAM signal in a five-channel 50-GHz spaced wavelength-division multiplexing (WDM) system. Optical phase conjugation (OPC) employing the mid-link spectral inversion technique is implemented by using a dual-pump polarization-independent fiber-optic parametric amplifier and compared to digital backpropagation (DBP) compensation over up to 800-km in a dispersion-managed link. In the single-channel case, the use of the DBP algorithm outperformed the OPC with a Q-factor improvement of 0.9 dB after 800-km transmission. However, signal transmission was not possible with DBP in the WDM scenario over the same link length while it was enabled by the OPC with a maximum Q-factor of 8.6 dB.
Keywords :
Q-factor; backpropagation; optical Kerr effect; optical fibre amplifiers; optical parametric amplifiers; optical phase conjugation; quadrature amplitude modulation; wavelength division multiplexing; Kerr nonlinearity mitigation; PDM 16-QAM signal transmission; Q-factor; WDM; digital backpropagation; dispersion-managed link; distance 800 km; dual pump optic parametric amplifier; fiber-optic parametric amplifier; frequency 50 GHz; mid-link spectral inversion; optical phase conjugation; polarization independent optic parametric amplifier; polarization-multiplexed signal; wavelength division multiplexing; Erbium-doped fiber amplifiers; Optical fiber amplifiers; Optical fiber communication; Optical fiber dispersion; Optical fiber polarization; Q-factor; Wavelength division multiplexing; Coherent detection; digital backpropagation (DBP); fiber nonlinearity; optical fiber communication; optical phase conjugation (OPC); quadrature amplitude modulation (QAM); wavelength-division multiplexing (WDM);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2015.2393152
