研究目的
Investigating the physical origin of higher-order soliton fission in nanophotonic semiconductor waveguides, focusing on the roles of nonlinear loss and free-carrier dispersion.
研究成果
The study concludes that nonlinear loss is the dominant perturbation in wire waveguides, while free-carrier dispersion is dominant in photonic crystal waveguides. The findings provide insights into the dynamics of soliton fission in semiconductor waveguides, highlighting the importance of considering both nonlinear loss and free-carrier effects in the design of integrated supercontinuum sources.
研究不足
The study is limited to specific waveguide geometries and pulse parameters. The impact of free-carrier dispersion and nonlinear loss may vary under different conditions. The simulations assume certain parameters like waveguide width as free parameters to match experimental data, which may not capture all real-world variations.
1：Experimental Design and Method Selection:
The study involves experiments and simulations to investigate soliton fission in silicon and InGaP waveguides. The theoretical models include the nonlinear Schr?dinger equation (NLSE) and generalized NLSE (GNLSE) to account for various perturbations like nonlinear loss and free-carrier dispersion.
2：Sample Selection and Data Sources:
Silicon-on-insulator wire waveguides and InGaP photonic crystal waveguides are used. The input pulses are 165 fs and 2.2 ps long, centered at 1556 nm and 1553 nm, respectively.
3：2 ps long, centered at 1556 nm and 1553 nm, respectively.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment includes a titanium-sapphire laser, optical spectrum analyzer, and microscope objectives for coupling light into the waveguides.
4：Experimental Procedures and Operational Workflow:
Pulses are launched into the waveguides, and the output spectra are measured. Simulations are performed to model the pulse propagation and compare with experimental results.
5：Data Analysis Methods:
The analysis involves comparing experimental spectra with those computed using the GNLSE, focusing on the impact of different perturbations on soliton fission.
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