A 50-Gb/s NRZ-modulated optical transmitter based on a DFB-LD and a 0.18-µm SiGe BiCMOS LD driver. - Takashi Takemoto; Yasunobu Matsuoka; Yoshikazu Sugiyama; Hidenori Yonezawa; Hiroki Yamashita; Koichiro Adachi; Takahiro Nakamura; Etsuko Nomoto; Kouji Nakahara; Hideo Arimoto; Kenichi Osada; Tatemi Ido (OFC, 2015)