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Self-aligned optical microcomb emerging between octave-separated lasers

Nature, Published online: 30 September 2026; doi:10.1038/s41586-026-11086-2 An architectural inversion shifts integrated optical frequency comb generation from outward broadening around a central pump to filling the spectrum between two octave-separated pumps through a self-aligned parametrically driven cavity soliton, enabling robust self-referencing for future deployable on-chip frequency and time metrology.