Symmetrical 50-Gb/s/λ PAM-4 TDM-PON at O-band Supporting 26 dB+ Loss Budget using Low-bandwidth Optics and Semiconductor Optical Amplifier

We experimentally demonstrated a symmetrical 50-Gb/s/λ PAM-4 TDM-PON in O-band to support over 26 dB link loss budget, with the using of simple DSP and SOA. The performances of DSP and dispersion tolerance are studied.