研究目的
Investigating the performance and design flexibility of a double-layer Si3N4 multi-ring resonator system for optical communications.
研究成果
The 3D integrated system consisting of a racetrack resonator coupled with an S-bend waveguide and two sub-microrings provides a compact footprint and a larger fabrication tolerance compared with conventional planar structures. The multi-ring system shows potential for building complex filtering or multifunction systems.
研究不足
The thermal tuning efficiency is limited by the low thermal coefficient of Si3N4 material and the large vertical coupling gap spacing and thick cladding layer between the heater and the waveguide.
1：Experimental Design and Method Selection:
The device performance is analyzed using the transfer matrix method.
2：Sample Selection and Data Sources:
The device comprises an S-bend waveguide cross-coupled with a ring cavity loaded with two sub-ring resonators.
3：List of Experimental Equipment and Materials:
Si3N4 waveguides, heaters for thermal tuning.
4：Experimental Procedures and Operational Workflow:
The device's transmission spectra are measured with varying coupling coefficients and heater voltages.
5：Data Analysis Methods:
The transfer matrix method is used for theoretical analysis, and measured spectra are compared with simulated results.
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