The xHLPD photodiodes provide high power operation up to 10 GHz bandwidth, and deliver up to 4 V peak-to-peak (+16 dBm CW) RF output power with exceptional phase linearity < 5 rad/W. The thermo-electrically cooled modules enable reliable device operation with multiple biasing options. Applications include ultra-low noise optical clocks, photonic time transfer, antenna remoting, and RF-over-Fiber.