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Recently proposed non-linear propagation models allow to derive simple link optimization rules. We show that local optimization leads to global optimization (LOGO) and propose a network optimization strategy (LOGON) that allows substantial control-plane simplification.
We present analytical results on the impact of nonlinear propagation in uncompensated links. We test the accuracy of our model in the context of ultradense wavelength-division-multiplexing polarization-multiplexed quadrature phase-shift keying (PM-QPSK) systems, at the Nyquist spectral efficiency limit. We show that the predicted system performance matches simulation results very accurately over a...
We derive closed-form expressions depending on a single fitting parameter for performance prediction of WDM PM-QPSK long-haul uncompensated transmission. Besides general properties, we demonstrate that nonlinear penalty is always equal to 1.76 dB.
We introduce an improved Figure of Merit for comparing different uncompensated fiber links for coherent transmission. The role of fiber dispersion in enhancing system performance is shown and verified by simulations and experiments.
The use of NRZ, RZ and CSRZ modulation formats in an Ultra-Dense WDM (UDWDM) scenario at 40 Gbit/s is investigated. Narrow optical filtering at the receiver and at the transmitter, as well as orthogonal polarization launch of adjacent channels, is studied in order to improve spectral efficiency.
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