High-Power Waveguide Integrated Modified Uni-Travelling Carrier Photodiode Arrays

We demonstrate high-speed and high-power evanescently-coupled waveguide modified uni-traveling-carrier photodiode arrays. The arrays are an optically parallel connection of different numbers of photodiodes. A responsivity of 0.46A/W at 1550nm, 3dB-bandwidth of 28GHz and 12dBm RF output power at 40GHz was achieved with such a device. Furthermore, the linearity was measured at different temperatures and frequencies in order to determine the limiting factor of the performance.