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Updated: Mar 10, 2026
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
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Dynamics of mode-coupling-induced microresonator frequency combs in normal dispersion
Optics Express
|December 14, 2016
Summary
Mode coupling initiates modulation instability (MI) in microresonator frequency combs within the normal group-velocity dispersion (GVD) regime. This method enables low-noise comb generation and broadband applications.
Area of Science:
- Nonlinear Optics
- Quantum Optics
- Photonics
Background:
- Microresonator-based frequency combs are crucial for various applications.
- Understanding the dynamics of comb generation in different dispersion regimes is essential.
- Mode coupling offers a novel approach to control comb formation.
Purpose of the Study:
- To investigate microresonator frequency comb generation in the normal group-velocity dispersion (GVD) regime.
- To explore the role of mode coupling in initiating and controlling comb dynamics.
- To analyze the phase-matching conditions governing modulation instability (MI) and comb spectra.
Main Methods:
- Experimental and theoretical investigation of microresonator dynamics.
- Utilizing mode coupling to perturb the pump-resonance mode.
- Analyzing phase-matching conditions for MI and comb spectra.
Main Results:
- Mode coupling directly initiates intracavity modulation instability (MI) in the normal GVD regime.
- A low-noise frequency comb is observed as the pump frequency is tuned.
- Phase-matching conditions accurately predict MI and comb spectral features.
Conclusions:
- Mode coupling is an effective method for initiating MI and generating combs in normal GVD microresonators.
- The findings extend the analogy between mode coupling and high-order dispersion.
- The study highlights potential for broadband comb generation in the normal GVD regime.
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