研究目的
Optimization of coplanar waveguide structure for ultra-wideband integrated electro-optic Mach-Zehnder modulator to minimize RF loss, impedance mismatch, and velocity mismatch.
研究成果
An optimized CPW design for thin-film lithium-niobate Mach-Zehnder EOMs was proposed, achieving a 3-dB bandwidth up to 400 GHz for a modulator with an active length of 3 mm. The design minimizes RF loss, impedance mismatch, and velocity mismatch, enabling operation at frequencies up to the terahertz range.
研究不足
The study primarily focuses on numerical simulations and may require experimental validation. The trade-off between RF loss and drive voltage needs careful consideration in practical applications.
1：Experimental Design and Method Selection:
Numerical tools were used to optimize the CPW transmission line for ultra-compact traveling wave EOMs.
2：Sample Selection and Data Sources:
The study focused on CPW structures on Y-cut thin film lithium-niobate.
3：List of Experimental Equipment and Materials:
CPW electrodes, buffer layer, lithium-niobate substrate.
4：Experimental Procedures and Operational Workflow:
Simulation of RF loss as a function of frequency, study of effects of space between electrodes, electrode thickness, and inner electrode width on RF loss, characteristic impedance, and effective refractive index.
5：Data Analysis Methods:
Numerical computation of parameters affecting RF loss and modulator performance.
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