Equalization of 4.4 ps 100 mW pulse generated by monolithic mode-locked laser diode through 20 Gbit/s 1000-km transmission line

Summary form only given. This report successfully equalizes 4.4-ps pulses generated by the monolithic ML-LD through 20-Gbit/s, 1000-km line with 100-km line amplifier spacing. The adequate equalized pulse width of 6.9 ps for 20 Gbit/s data rate is obtained after transmission. An experimental setup is shown. 19.88-GHz repeated 4.4-ps optical pulse at λc=1552 nm was generated by the monolithic ML-LD. The transmission line consisted of ten 100-km dispersion-shifted fiber spools with positive or negative dispersion and 9 line amplifiers including 5-nm optical filter. Input average power to each span was set to 6.5 dBm. The peak power was estimated to be 100 mW considering the pulse width of 4.4 ps. The pulse width before and after transmission was measured with a streak camera with 4-ps resolution. Calculated pulse widths from measurements were 4.4 ps and 6.9 ps, respectively.