Differential Drive EML with P/N Electrode Isolated toward Low Vpp Application

Differential drive EML with P doping isolation at N side was demonstrated. The bandwidth is higher than 50 GHz and reflection is lower than -10 dB at both anode and cathode drive condition. The bandwidth of conventional single-ended-drive EML is greater than 60 GHz, and the reflection is less than -5 dB in the range of $0 \sim 70 \mathrm{GHz}$.