100 Gb/s/λ Duo-Binary PAM-4 Transmission Using 25G Components Achieving 50 km Reach Ghulam Saber, Md. ; Plant, David V. ; Gutierrez-Castrejon, Ramon ; Samiul Alam, Md. ; Xing, Zhenping ; El-Fiky, Eslam ; Xu, Luhua ; Cavaliere, Fabio ; Vall-Llosera, Gemma ; Lessard, Stephane Abstract Publication: IEEE Photonics Technology Letters Pub Date: February 2020 DOI: 10.1109/LPT.2019.2962326 Bibcode: 2020IPTL...32..138G