CMOS DAC Supported 1.1 Tb/s/λ DWDM Transmission at 9.8 bit/s/Hz Over DCI Distances

作者：Fred Buchali, Vincent Lauinger, Mathieu Chagnon, Karsten Schuh, Vahid Aref · 发表于：Journal of Lightwave Technology · 年份：2020 · DOI：10.1109/jlt.2020.3034575 · 被引用次数：21 · 研究领域：Optical Network Technologies、Error Correcting Code Techniques、Advanced Wireless Communication Techniques

We report on a 16-nm CMOS DAC based transmitter optimization enabling bitrates up to 1.1 Tb/s. We describe the transmitter optimization and derive the maximization of the net bitrate. Based on back-to-back experiments we optimize the entropy of the probabilistically shaped QAM format, which we further apply for subsequent transmission experiments over data center interconnect distances. Finally, we successfully demonstrate DWDM transmission of 17 channels in a 112.5 GHz grid operated at 105 GBaud over 80 km up to 118 km achieving a net bitrate of 1.1 Tb/s and spectral efficiencies of 9.8 bit/s/Hz.