Over 40 GHz Bandwidth and 0.7-V Vπ Compact InP-Based Electro-optic Modulator with n-i-n MQBs

A compact InP-based electro-optic modulator with n-i-n multiple quantum barriers is demonstrated. An ultra-low half-wave voltage-length product of 0.07 V•cm is recorded, together with over 40 GHz bandwidth for a 1-mm modulation length.