Employing Deep Neural Network for High Speed 4-PAM Optical Interconnect

We implement a deep neural network (DNN) to attain a 64-Gbps 4-PAM, 4-km MMF link by using 850-nm VCSEL, with BER of 4.41 ×10−'5. The data-rate-distance product achieves recorded high of 256-Gbps-km for Inter-data center applications.