Miniature Slow-light Bragg Reflector Waveguide Modulator with over 20GHz Modulation Bandwidth

摘要

A slow-light Bragg reflector waveguide optical modulator is designed and optimized for operations with large modulation bandwidth and ultra-low power consumption. Devices with various modulator lengths are fabricated and characterized. Extinction ratios over 15dB and 30dB are obtained with reverse bias voltages below 1 V and 1.5 V, respectively. In a 20-μm long modulator, 3dB modulation bandwidth exceeds 20GHz with a bias voltage of only -600mV. Total energy consumptions of the modulator is estimated to be lower than 100 fJ/bit including both load and dynamic power dissipations.