Flexible grid spacing using Nyquist-shaped channels for undersea transmission

P. Mehta; J. Gaudette; J. Li

doi:10.1117/12.2074784

25 September 2014 Flexible grid spacing using Nyquist-shaped channels for undersea transmission

P. Mehta, J. Gaudette, J. Li

Proceedings Volume 9288, Photonics North 2014; 928807 (2014) https://doi.org/10.1117/12.2074784
Event: Photonics North 2014, 2014, Montréal, Canada

Abstract

In this paper, we experimentally study DC-PM-BPSK, PM-QPSK, and PM-16QAM at 35 Gbaud for undersea transmission in a WDM environment with frequency spacing ranging from 50 GHz (DWDM) to 33 GHz (Super-Nyquist). The experimental study focuses on noise, linear cross-talk, and nonlinear tolerance in two undersea applications: (1) Legacy dispersion-managed submarine cables up to 5,000 km in length and (2) New uncompensated submarine cables up to 12,500 km in length. We experimentally demonstrate that a reduction in frequency spacing below the symbol rate can be achieved, and quantify the performance penalties. We also show a comparison of performance and reach between legacy dispersion-managed applications, and new uncompensated applications, as the frequency spacing is reduced below the symbol rate. It is shown that the constellation and line system dispersion map have a significant impact on the tolerance to linear and nonlinear interference generated by narrow frequency spacing.

Citation Download Citation

P. Mehta, J. Gaudette, and J. Li "Flexible grid spacing using Nyquist-shaped channels for undersea transmission", Proc. SPIE 9288, Photonics North 2014, 928807 (25 September 2014); https://doi.org/10.1117/12.2074784

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