The dependence of propagation performance on the signal baud-rate is investigated by simulations for dense WDM PDM-16QAM systems operating at a spectral efficiency of 4 b/s/Hz. We take into account the case of transmission over uncompensated links, both for standard single-mode fiber and non-zero dispersion-shifted fiber. Three baud-rates are tested: 16.25, 32.5, and 65 Gbaud, including overhead for soft-decision FEC. Hence, we compare the performance limited by the nonlinear impairments in case of 100, 200, 400 Gb/s data rate transmission, respectively. We demonstrate that the trade-off between higher OSNR margins and nonlinear transmission penalties favor transmission at lower baud-rate and narrower channel spacing.
PDM-16QAM transmission performance over uncompensated fiber links
BOFFI, PIERPAOLO;MARTELLI, PAOLO;CIRIGLIANO, MATTEO;MAGARINI, MAURIZIO;MARTINELLI, MARIO;
2011-01-01
Abstract
The dependence of propagation performance on the signal baud-rate is investigated by simulations for dense WDM PDM-16QAM systems operating at a spectral efficiency of 4 b/s/Hz. We take into account the case of transmission over uncompensated links, both for standard single-mode fiber and non-zero dispersion-shifted fiber. Three baud-rates are tested: 16.25, 32.5, and 65 Gbaud, including overhead for soft-decision FEC. Hence, we compare the performance limited by the nonlinear impairments in case of 100, 200, 400 Gb/s data rate transmission, respectively. We demonstrate that the trade-off between higher OSNR margins and nonlinear transmission penalties favor transmission at lower baud-rate and narrower channel spacing.| File | Dimensione | Formato | |
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OptExp_19_21898_2011.pdf
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