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We characterize high-power photodiodes under short pulse illumination for microwave generation. Photodetection limits the 10 GHz instability to 1.4 × 10−17 at 1 s, corresponding to 1/f phase noise of −135 dBc/Hz at 1 Hz.
Using carefully constructed pulse interleavers, we demonstrate ∼10 dB reduction in the quantum noise from optical amplification for short pulse detection, resulting in a phase noise floor on a 10 GHz microwave of −175 dBc/Hz.
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