224-Gb/s PAM4 Uncooled Operation of Lumped-electrode EA-DFB Lasers with 2-km Transmission for 800GbE Application

Newly developed lumped-electrode (LE) EA-DFB lasers demonstrated 224-Gb/s PAM4 uncooled operation with 2-km transmission. Its average output power and TDECQ from 20 to 80°C are respectively more than 6 dBm and less than 2.8 dB.