22.9 A 1310nm 3D-integrated silicon photonics Mach-Zehnder-based transmitter with 275mW multistage CMOS driver achieving 6dB extinction ratio at 25Gb/s. - Marco Cignoli; Gabriele Minoia; Matteo Repossi; Daniele Baldi; Andrea Ghilioni; Enrico Temporiti; Francesco Svelto (ISSCC, 2015)