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Updated: Sep 1, 2025
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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
Published on: December 15, 2021
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Zero dispersion Kerr solitons in optical microresonators.
Miles H Anderson1, Wenle Weng1,2, Grigory Lihachev1
1Institute of Physics, Swiss Federal Institute of Technology Lausanne (EPFL), 1015, Lausanne, Switzerland.
Nature Communications
|August 13, 2022
Summary
Researchers observed novel
Area of Science:
- Nonlinear optics
- Quantum optics
- Cavity optomechanics
Background:
- Solitons are ubiquitous shape-preserving waveforms in nonlinear systems.
- Bright solitons and dark solitons are well-studied classes.
- A hybrid structure between these has been theoretically predicted but not observed.
Purpose of the Study:
- To report the first observation of a novel dissipative structure.
- To characterize this structure in the vanishing group velocity dispersion regime.
- To explore its potential for broadband comb generation.
Main Methods:
- Experimental observation in a silicon nitride (Si3N4) microresonator.
- Utilizing synchronous pulse-driving.
- Characterizing the generated optical frequency comb spectrum.
Main Results:
- Observation of 'zero-dispersion solitons', a hybrid between switching waves and dissipative solitons.
- These structures arise from interlocking modulated switching waves.
- A 136 THz (97% of an octave) broadband spectrum was generated, enhanced by higher-order dispersive waves.
Conclusions:
- The existence of zero-dispersion solitons is experimentally confirmed.
- This expands Kerr cavity physics to the zero-dispersion regime.
- These solitons offer a potential superior alternative for broadband comb generation.
