研究目的
To design and analyze a dispersion-engineered and highly nonlinear rib waveguide for the generation of broadband supercontinuum spectra.
研究成果
The proposed waveguide design enables the generation of a broadband and flat supercontinuum spectrum from 1.5 μm to 15 μm, suitable for integrated optical circuits. The structure's optimized dimensions and materials contribute to its high nonlinear coefficient and efficient supercontinuum generation with low input power and short waveguide length.
研究不足
The study is numerical, and practical fabrication challenges are not addressed. The sensitivity of the waveguide's performance to dimensional variations is noted, but detailed tolerance analysis is limited.
1：Experimental Design and Method Selection:
The study involves the design of a waveguide with a core of As2Se3 chalcogenide glass and claddings of MgF2, optimized for dispersion properties. The nonlinear Schr?dinger equation is solved numerically using the split-step Fourier method to analyze supercontinuum generation.
2：Sample Selection and Data Sources:
The waveguide dimensions are optimized to achieve a flat dispersion curve and two zero-dispersion wavelengths. The materials' refractive indices are calculated using the Sellmeier equation.
3：List of Experimental Equipment and Materials:
The waveguide consists of As2Se3 core and MgF2 claddings. Input pulses with specific durations and powers are applied to generate supercontinuum.
4：Experimental Procedures and Operational Workflow:
The effects of changes in waveguide dimensions on dispersion are investigated. Supercontinuum generation is simulated for various waveguide lengths and input powers.
5：Data Analysis Methods:
The dispersion profile and supercontinuum spectrum are analyzed to evaluate the waveguide's performance.
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