  By tailoring probabilistic constellation shaping (PCS) for nonlinearity
tolerance, we experimentally demonstrate up to 1.1 dB increase in
signal-to-noise ratio (SNR) and 6.4% increase in total net data rate (NDR)
compared to linear-channel-optimized PCS on a 2824-km dispersion-managed
wavelength-division multiplexed (WDM) optical fiber link.
