Uncooled Operation of 53-Gbaud PAM4 (106-Gb/s) EA/DFB Lasers with Extremely Low Drive Voltage with 0.9 Vpp. - Yoshihiro Nakai; Akira Nakanishi; Yoriyoshi Yamaguchi; Syunya Yamauchi; Atsushi Nakamura; Hideaki Asakura; Hayato Takita; Shigenori Hayakawa; Masatoshi Mitaki; Yasushi Sakuma; Kazuhiro Naoe (ECOC, 2018)