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We report a Si/Ge waveguide-coupled uni-traveling carrier (UTC) photodiode for high-power high-speed applications. Using the uni-traveling carrier structure rather than a PIN structure, capacitance and power handling are decoupled from responsivity and transit-time, enabling a detector with a 40 GHz bandwidth and a dilute absorption profile. This photodiode had a responsivity at 1550 nm of 0.5 A/W...
We demonstrate a high-speed integrated optical link on a silicon chip using low-power silicon microresonator electro-optic modulators and low-capacitance germanium photodetectors. Integrating compact devices to provide multiple functions is essential for building scalable optical interconnects.
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