Abstract
We report numerical investigations of increasing system reach beyond the limit imposed by the state-of-the-art digital signal processing (typically 70 ns nm−1 or 4000 km of standard single mode fiber (SSMF)) by using partial optical dispersion compensation in wavelength division multiplexing 100 Gb s−1 dual polarization quadrature phase shift keying coherent systems. Our numerical model has been verified by the comparison of simulation results with the straight-line real-time transmission experiment. We find that for a legacy fiber-based (non-zero dispersion-shifted fiber) link the transmission distance can be extended to 7000 km with either hybrid spans consisting of SSMF and non-zero dispersion-shifted fiber, or by using partial dispersion compensation employing dispersion-compensating fiber (DCF)with a 1.5 and 0.6 dB optical signal-to-noise ratio (OSNR) margin respectively.
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