The recent explosive growth in communications has been brought about by fiber optic and wireless communications technologies. These two technologies have merged to create an interdisciplinary area called microwave photonics, including RF optical links, oscillators, and radar. The research in the Optoelectronics Devices Group at ShanghaiTech University focuses on developing optoelectronic components and technologies that enable new applications and advances in microwave photonic systems. One of the critical devices for signal generation in microwave photonic systems is the high-speed, high-power photodiode. Our work includes developing state-of-the-art Silicon-based, InP-based high-speed, high-power photodetectors and arrays.