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Downie JD, Hurley J, Roudas I, et al. Unrepeatered 256 Gb/s PM-16QAM transmission over up to 304 km with simple system configurations. Opt Express. 2014;22(9):10256-61doi: 10.1364/OE.22.010256.
Downie, J. D., Hurley, J., Roudas, I., Pikula, D., & Garza-Alanis, J. A. (2014). Unrepeatered 256 Gb/s PM-16QAM transmission over up to 304 km with simple system configurations. Optics express, 22(9), 10256-61. https://doi.org/10.1364/OE.22.010256
Downie, John D, et al. "Unrepeatered 256 Gb/s PM-16QAM transmission over up to 304 km with simple system configurations." Optics express vol. 22,9 (2014): 10256-61. doi: https://doi.org/10.1364/OE.22.010256
Downie JD, Hurley J, Roudas I, Pikula D, Garza-Alanis JA. Unrepeatered 256 Gb/s PM-16QAM transmission over up to 304 km with simple system configurations. Opt Express. 2014 May 05;22(9):10256-61. doi: 10.1364/OE.22.010256. PMID: 24921729.
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Opt Express. 2014 May 05;22(9):10256-61. doi: 10.1364/OE.22.010256.

Unrepeatered 256 Gb/s PM-16QAM transmission over up to 304 km with simple system configurations.

Optics express

John D Downie, Jason Hurley, Ioannis Roudas, Dragan Pikula, Jorge A Garza-Alanis

PMID: 24921729 DOI: 10.1364/OE.22.010256

Abstract

We study unrepeatered transmission of 40x256 Gb/s systems with polarization-multiplexed 16-quadrature amplitude modulation (PM-16QAM) channels using simple coherent optical system configurations. Three systems are investigated with either a homogeneous fiber span, or simple two-segment hybrid fiber designs. Each system relies primarily on ultra-low loss, very large effective area fiber, while making use of only first-order backward pumped Raman amplification and no remote optically pumped amplifier (ROPA). For the longest span studied, we demonstrate unrepeatered 256 Gb/s transmission over 304 km with the additional aid of nonlinear compensation using digital backpropagation. We find an average performance improvement in terms of the Q-factor of 0.45 dB by using digital backpropagation compared to the case of using chromatic dispersion compensation alone for an unrepeatered span system.

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