Hybrid-integrated dark-pulse microcombs towards visible light spectrum
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classification
physics.optics
physics.app-phphysics.atom-ph
keywords
dark-pulsealgaas-basedatom-chipbandchip-scalecoherentcombscompact
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Leveraging hybrid integration, we demonstrate dark-pulse formation at 780-nm wavelength band in integrated Si$_3$N$_4$ microresonators driven by high-power AlGaAs-based chip-scale lasers. The device outputs coherent frequency combs with electronically detectable repetition rates down to 20 GHz, paving a route to efficient and compact atom-chip interfaces for spectroscopy, metrology and sensing.
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