A silicon-on-insulator single-arm Mach-Zehnder interferometer (SAMZI) modulator

We demonstrate a single-arm Mach-Zehnder interferometer (SAMZI) modulator based on asymmetric long-period gratings for TE0-TE1 mode conversion integrated with a p-n junction doped waveguide for relative phase modulation between these modes via the electro-optic effect. The device consists of two long-period grating sections, with the active waveguide modulator section in-between, and inverse tapers at the input (to couple in only the TE0 mode), …