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We demonstrate 6dB improvement in phase noise of a mode-locked semiconductor laser using coherent photon seeding, achieving a record linewidth of 29kHz. The complete photonic-circuit including the feedback cavity is integrated on a single chip.
We have developed 64-pixel free-space-coupled arrays of WSi SNSPDs as a pathfinder for the ground detector in a deep-space optical communication system. Our receiver prototype was used to close a real-time deep-space optical communication link at 47 Mbps.
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