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Raman-Kerr frequency combs in microresonators with normal dispersion.
Optics Express
|December 17, 2017
Summary
Raman scattering initiates frequency comb generation in microresonators, leading to unstable platicon pulses and complex dynamics. This study explores Raman-Kerr combs and their impact on pulse behavior under normal dispersion.
Area of Science:
- Nonlinear optics
- Quantum optics
- Photonics
Background:
- Microresonators are key for nonlinear optics.
- Frequency combs are crucial for precision measurements.
- Simultaneous Raman and Kerr nonlinearities present unique challenges.
Purpose of the Study:
- Generalize coupled mode formalism for Raman-Kerr nonlinearities.
- Investigate Raman effect's impact on frequency comb formation.
- Analyze platicon dynamics under normal dispersion.
Main Methods:
- Coupled mode formalism generalization.
- Numerical simulations of microresonator dynamics.
- Analysis of spectral and temporal pulse evolution.
Main Results:
- Raman effect initiates sideband generation, forming Raman-Kerr frequency combs.
- Raman scattering induces instability in Kerr-based platicon pulses.
- Observed branching of platicons and complex spatiotemporal dynamics.
Conclusions:
- Raman nonlinearity significantly alters frequency comb generation and pulse dynamics.
- Instability induced by Raman scattering leads to novel phenomena.
- Understanding these dynamics is crucial for advanced photonic applications.
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