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We experimentally demonstrate a photonic RF sampling system that utilizes chirp processing of ultrafast laser pulses to achieve all-optical high-rate pseudorandom patterning and inner product integration for compressed sensing measurement. We successfully acquire multi-tone sparse radio frequency (RF) signals at arbitrary offsets from the reconstruction basis frequencies in an 11.95 GHz bandwidth...
We demonstrate 119.2-GSample/s compressive microwave frequency detection using spectrally-encoded ultrafast laser pulses. We sense sparse tones over > 35-GHz instantaneous bandwidth with 2-MHz accuracy using < 300 consecutive compressive measurements acquired at a 400-MHz rate.
Using chirp processing of ultrafast laser pulses to perform pseudorandom measurements for compressed sensing, we successfully reconstruct multi-tone sparse-frequency microwave signals with an effective sampling rate well beyond the electronic limit.
We characterize optical crosstalk and the associated bit-error rate degradation in silicon nanowaveguides. Our results indicate that the crosstalk decreases with increasing modulation frequency and decreases with input power, which we attribute to free-carrier absorption.
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