Demonstration of 53.125 Gb/s, CWDM, PAM-4, Directly Modulated Laser Transmission over 20 km SMF. - Prashant P. Baveja; Mingshan Li 002; YuJing Chen; Ding Wang; Huanlin Zhang; Yi Wang; Qin Li; Chong Wang; Hsiu-Che Wang; I-Lung Ho; Jun Zheng 013 (OFC, 2018)