Ultra Linear Modulator with High Output RF Gain Using a 1 × 2 MMI Coupler

摘要

A novel and compact electro-optic modulator implemented by a combination of a 1 × 2 multimode interference (MMI) coupler and an integrated Mach-Zehnder interferometer (MZI) modulator consisting of a microring and a phase modulator (PM) is presented and analyzed theoretically. It is shown that the proposed modulator offers both ultra-linearity and high output RF gain simultaneously, with no requirements for complicated and precise direct current (DC) control.