Flip-Chip Interconnection Lumped-Electrode EADFB Laser for 100-Gb/s/ <tex-math notation='LaTeX'>$\lambda $ </tex-math> Transmitter

We have achieved the 100-Gb/s/ $\lambda $ operation of a flip-chip interconnection 1.3- $\mu \text{m}$ lumped-electrode electroabsorption modulator integrated with a distributed feedback laser module for the first time. The flip-chip interconnection provides a flatter frequency response characteristic and a higher modulation bandwidth. Clear eye opening was achieved for 103-Gb/s nonreturn to zero and equalizer-free 56-GBd 4-pulse-amplitude modulation operation after a 10-km single-mode fiber transmission.