We propose a mathematical model to optimize the time and frequency allocations in a subcarrier multiplexing (SCM) based TFDMA PON with user diversity. We verify its effectiveness by experimentally comparing its achievable rate with SCM-based TDMA.

We experimentally demonstrate a novel, low-complex Fourier Convolution-based Network based equalizer for 112 Gb/s upstream PAM4-PON. At a BER of ∼ 5e−3, FConvNet enhances the receiver sensitivity by 2 and 1 dB compared to a 51-tap Sato equalizer and benchmark machine learning algorithms, respectively.

We experimentally demonstrate the feasibility of 100 Gbit/s PAM-4 PON with an extended optical power budget of 41.2 dB. We also study stimulated Brillouin scattering (SBS) suppression relevant to high launch power conditions and multipath interference (MPI) to which PAM-4 signals are sensitive.

Status, paths and challenges towards realization and standardization of 100G or 200G-PONs are described, and technology options, be it intensity-modulation and direct-detection or a coherent solution, are highlighted and analyzed.