Fig. 1. (a) Experimental setup of the 96-channel WDM coherent system. (b) The symbol probability distribution of the generated PS-64QAM with the entropy of 5.2, 5.6, and 5.9. FC/UPC, fiber connector with ultra-physical contact; DP-ICR, dual-polarization integrated coherent receiver.

Fig. 2. (a) Loss and SEM image of the NANF span. (b) The optical spectra of the 96-channel WDM signals with and without 2-km NANF transmission.

Fig. 3. Block diagram of the DSP algorithms employed at the Tx and Rx.

Fig. 4. NGMI curves of the single-channel and 96-channel PS-64QAM-5.9 signals versus the optical launch power over 2-km SSMF and NANF.

Fig. 5. NGMI curves versus the measured OSNR after 2-km NANF transmission with different CPE algorithms at (a) PS-64QAM-5.2, (b) PS-64QAM-5.6, and (c) PS-64QAM-5.9.

Fig. 6. NGMI performance of the WDM PS-64QAM-5.9 signals and the constellation diagrams of the signals at ITU-T C15, C30, and C45.