16384-QAM transmission at 10 GBd over 25-km SSMF using polarization-multiplexed probabilistic constellation shaping

We demonstrate the transmission of 10-GBd polarization-multiplexed probabilistically shaped 16384-ary quadrature amplitude modulation (16384-QAM) over 25.5-km standard single mode fiber (SSMF), with a net single-carrier bit rate of 223.8 Gb/s carrying 22.3 information bits/symbol/2-pol.