Fiber Nonlinear Effects Compensation by Using Multi-Head Self-Attention Bi-LSTM

A bi-directional long short-term memory neural network based nonlinear equalizer with multi-head self-attention mechanism is proposed. The Q-factors of single-channel and 5-channel 130Gbaud dual-polarization fiber-optics communication systems are improved by 0.75 dB and 0.68 dB, respectively.