Model-aided Geometrical Shaping of Dual-polarization 4D Formats in the Nonlinear Fiber Channel

22 Oct 2021  ·  Gabriele Liga, Bin Chen, Alex Alvarado ·

The geometry of dual-polarization four-dimensional constellations is optimized in the optical fiber channel using a recent nonlinear interference model. A 0.27 bit/4D rate gain and 13\% reach increase are attained compared to polarization-multiplexed formats.

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