Transmission Performance of Hybrid-Shaped 56APSK Modulation Formats from 34.7 to 74.7 GBd over Transoceanic Distance

We experimentally study the impact of symbol rate on transmission performance. From 34.7 to 74.7Gbd SNR decreases by ∼1.5dB; hardware and nonlinear transmission effects cause 0.7dB and 0.8dB respectively. NLC benefit decreases at higher rates.

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