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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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Two-colour dissipative solitons and breathers in microresonator second-harmonic generation
Juanjuan Lu1,2, Danila N Puzyrev3,4, Vladislav V Pankratov3,4
1Department of Electrical Engineering, Yale University, New Haven, CT, 06511, USA.
Nature Communications
|May 16, 2023
Summary
Researchers generated novel two-colour dissipative solitons in microresonators, enabling broadband optical frequency combs for spectroscopy and data processing. This work advances nonlinear and quantum optics applications.
Area of Science:
- Nonlinear Optics
- Quantum Optics
- Optical Engineering
Background:
- Broadband optical frequency combs are crucial for precision spectroscopy and data processing.
- Generating these combs via frequency conversion of dissipative solitons presents a significant challenge.
- Existing methods often face limitations in tooth spacing and spectral coherence.
Purpose of the Study:
- To investigate the generation of dissipative two-colour solitons in quasi-phase-matched microresonators.
- To explore the characteristics of bright-bright and dark-dark solitons under second-harmonic generation.
- To understand the role of phase matching and resonance line tilt in soliton dynamics.
Main Methods:
- Utilized quasi-phase-matched microresonators for second-harmonic generation.
- Investigated dissipative two-colour bright-bright and dark-dark soliton formation.
- Analyzed soliton and breather states, including pulse front motion and collisions.
- Examined the impact of phase mismatch and resonance line tilt on spectral properties.
Main Results:
- Successfully generated dissipative two-colour bright-bright and dark-dark solitons.
- Observed breather states linked to pulse dynamics and collisions.
- Found that slightly phase-mismatched resonators typically support the soliton regime.
- Phase-matched resonators yielded broader, incoherent spectra and higher-order harmonic generation.
- Soliton and breather effects were confirmed for a negative resonance line tilt, driven by second-order nonlinearity.
Conclusions:
- Dissipative two-colour solitons can be generated in quasi-phase-matched microresonators.
- The interplay between phase matching and nonlinearity dictates spectral characteristics and soliton behavior.
- This research provides a pathway towards practical applications of optical frequency combs.
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