56Gb/s chirp-managed symbol transmission with low-cost, 10-G class LD for 400G intra-data center interconnection

We have demonstrated up to 56-Gb/s cost-efficient transmission for intra-data center interconnection over 10-km SMF-28 with negative power penalty. This 56-Gb/s transmitter comprises a low-cost 10-G-class directly-modulated distributed-feedback (DFB) laser without requiring expensive DAC, ADC and power-consumptive DSP.