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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 35,
  • Issue 4,
  • pp. 931-940
  • (2017)

Probabilistic Design of Optical Transmission Systems

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Abstract

Traditionally, optical fiber nonlinearity is considered a limiting factor for transmission systems. Nevertheless, from a system design perspective this nonlinearity can be exploited to minimize the impact of uncertainty on the system performance. A consequence of this is that it becomes beneficial to consider the uncertainty at the design stage, resulting in a probabilistic design, rather than conventional design approaches whereby uncertainty is added by way of system margins to a deterministic design. In this paper, we conduct extensive experimental measurements to quantify the impact of uncertainty for a multispan wavelength division multiplexed system transmitting 100 GbE or 200 GbE as dual polarization quadrature phase-shift keying (QPSK) or 16 quadrature amplitude modulation (16QAM), respectively. The impact of uncertainty in the power launched into a span is assessed for a 10 × 80 km link. For dual polarization (DP)-QPSK, the intralink power deviation with the probabilistic design with 100% reliability is $\pm$ 1.3 dB falling to 99% reliability with $\pm$ 1.6 dB. In contrast, for DP-16QAM maximum deviation for 100% reliability is $\pm$ 0.5 dB falling to 99% for $\pm$ 0.6 dB. Following this, we consider the interplay between polarization dependent loss (PDL) and fiber nonlinearity over an 8 $\times$ 80 km system again for both DP-QPSK and DP-16QAM. A system Q variation of less than 0.15 dB due to the interaction between PDL and fiber nonlinearity is observed for 99.9% of examined PDL values for DP-QPSK and DP-16QAM, thereby allowing the two effects to be considered separately.

© 2016 IEEE

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