Demands for reducing power, size, and cost of optical transponder module have been increasing. Recent development of 40Gb/s optical signal transmission technology like DQPSK modulation [1] and sub-100nm CMOS IC technology with f T  of more than 100GHz opened up new CMOS IC solution [2,3]. This paper describes the prototype serializer (SER) IC for a 40Gb/s optical transponder module featuring SFI5.2 input interface and two output modes, dual 20Gb/s and single 40Gb/s, to support SONET OC-768, SDH STM 256 and ITU G.709. The data rate covers from 21.5 to 22.3Gb/s for the dual-20Gb/s mode, and from 39.8 to 44.6Gb/s for the single-40Gb/s mode.
['Kouichi Kanda', 'Hirotaka Tamura', 'Takuji Yamamoto', 'Satoshi Matsubara', 'Masaya Kibune', 'Yoshiyasu Doi', 'Takayuki Shibasaki', 'Nestoras Tzartzanis', 'Anders Kristensson', 'Samir Parikh', 'Satoshi Ide', 'Yukito Tsunoda', 'Tetsuji Yamabana', 'Mariko Sugawara', 'Naoki Kuwata', 'Tadashi Ikeuchi', 'Junji Ogawa', 'Bill Walker']
A Single-40 Gb/s Dual-20 Gb/s Serializer IC With SFI-5.2 Interface in 65 nm CMOS