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We report the first experimental validation of the EGN-model. Using a PM-QPSK Nyquist-WDM transmission we confirm the enhanced accuracy of the EGN-model comparing maximum reach predictions with those of GN-model.
We accurately characterize nonlinear phase noise in uncompensated coherent optical systems. We find that, though present, its impact on system performance is typically negligible in a wide range of practical system scenarios.
We find evidence that low-OSNR operation causes substantial penalty on the system maximum reach due to non-linearity generated by ASE noise and due to signal-power conversion into non-linear noise. Neglecting these effects may lead to quite substantial performance prediction error.
Dispersion pre-compensation is shown to potentially lead to a substantial non-linearity reduction in PM-QPSK links that use a mixture of high and low dispersion fibers. However, the much larger PAPR of the pre-compensated signal poses challenging requirements on the transmitter.
We report on the generation of >50 nm of a 12.5 GHz-spaced frequency comb in the 1550 nm band, achieved by optically filtering a 250 MHz self-referenced frequency comb. Pulse compression yields 150 fs pulses.
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