A 44Gbps high extinction ratio silicon Mach-Zehnder modulator with a 3D-integrated 28nm FD-SOI CMOS driver

We present a silicon electro-optic transmitter consisting of a 28nm UTBB FD-SOI CMOS driver flip-chip integrated onto a Mach-Zehnder modulator. At 44 Gbps, the extinction ratio was 6.4 dB at the modulator quadrature operation point.