研究目的
Investigating the generation of Kerr frequency combs and dissipative Kerr solitons in silicon photonic crystal coupled-cavity waveguides with optimized dispersion at telecom wavelengths.
研究成果
The study demonstrates the potential of CCW systems for low-threshold frequency comb generation via advanced dispersion engineering and slow-light nonlinear enhancement. It highlights the role of structural slow-light in reducing the minimal power to trigger four-wave mixing phenomena and the possibility of dissipative Kerr solitons in realistic dispersion-engineered silicon photonic crystal CCWs at telecom wavelengths.
研究不足
The study is limited to silicon photonic crystal coupled-cavity waveguides and does not explore other materials or geometries. The effects of fabrication disorder and finite-size effects are mentioned but not deeply analyzed.
1：Experimental Design and Method Selection:
The study involves solving the nonlinear dynamics of the CCW Bloch modes in the presence of Kerr nonlinearity and two-photon absorption.
2：Sample Selection and Data Sources:
The system is a silicon photonic crystal coupled-cavity waveguide with globally optimized dispersion.
3：List of Experimental Equipment and Materials:
The study uses a photonic crystal CCW formed by coupled L3 cavities, with specific parameters for hole sizes and positions to tune coupling and optimize losses.
4：Experimental Procedures and Operational Workflow:
The nonlinear coupled-mode equations are solved using an explicit Runge-Kutta integrator and fast Fourier transform to simulate the dynamics until steady state is reached.
5：Data Analysis Methods:
The analysis includes examining the dispersion relation, second-order dispersion, and group index, as well as the threshold for comb generation and the effects of two-photon absorption.
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