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Abstract
Microcavity-based frequency combs, or ‘microcombs’ have enabled many fundamental breakthroughs through the discovery of temporal cavity-solitons. These self-localized waves, described by the Lugiato–Lefever equation, are sustained by a background of radiation usually containing 95% of the total power. Simple methods for their efficient generation and control are currently being investigated to finally establish microcombs as out-of-the-lab tools. Here, we demonstrate microcomb laser cavity-solitons. Laser cavity-solitons are intrinsically background-free and have underpinned key breakthroughs in semiconductor lasers. By merging their properties with the physics of multimode systems, we provide a new paradigm for soliton generation and control in microcavities. We demonstrate 50-nm-wide bright soliton combs induced at average powers more than one order of magnitude lower than the Lugiato–Lefever soliton power threshold, measuring a mode efficiency of 75% versus the theoretical limit of 5% for bright Lugiato–Lefever solitons. Finally, we can tune the repetition rate by well over a megahertz without any active feedback.
Original language | English |
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Pages (from-to) | 384-389 |
Number of pages | 6 |
Journal | Nature Photonics |
Volume | 13 |
Issue number | 6 |
Early online date | 11 Mar 2019 |
DOIs | |
Publication status | Published - 1 Jun 2019 |
Keywords
- microcavity-based frequency combs
- microcombs
- Lugiato–Lefever equation
- semiconductor lasers
- microcomb laser cavity-solitons
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Projects
- 1 Finished
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QT Hub partnership project with KNT
Riis, E., Arnold, A. & Griffin, P.
EPSRC (Engineering and Physical Sciences Research Council)
1/09/17 → 31/08/19
Project: Research