52-GBand pre-emphasized PAM-4 encoding of EAM/DFBLD at 1310 nm for inter datacenter link. - Chun-Chieh Chu; Yu-Hong Lin; Huang-Shen Lin; Wei-Li Wu; Chih-Hsien Cheng; Huai-Yung Wang; Cheng-Ting Tsai; Gong-Ru Lin (OECC/PSC, 2019)