Optical modulator and design method therefor

摘要

A high-speed, high-performance optical modulator operating with a reduced drive voltage without sacrificing modulation bandwidth. The modulator has an optical waveguide fabricated on a crystal substrate. A signal electrode is on a ridge on the substrate. Ground electrodes are formed on both sides of the signal electrode. A gap between the signal and ground electrodes is at least 44 mum, and an interaction length of the signal electrode is at least 41 mm. The modulator can operate at 40 Gbps or higher.