Long Short Term Memory Regression and Dense Neural Network Enabled 200-Gbit/s PAM4 using GeSi Electro-Absorption Modulator (EAM)

A long-short-term-memory-regression (LSTM) and dense-neural-network (DNN) enabled high-speed four-level pulse-amplitude-modulation (PAM4) generation using GeSi electro-absorption modulator (EAM) is demonstrated. It supports 200-Gbit/s 1-km standard-single-mode-fiber (SSMF) and 240-Gbit/s back-to-back (B2B) transmissions fulfilling the soft-decision-forward-error-correction (SD-FEC).