研究目的
To propose a new design of a 3×1 multimode interference (MMI) power combiner based on a slot waveguide structure for reducing losses in photonic integrated circuits (PIC).
研究成果
The proposed ultracompact 3×1 power combiner based on an MMI coupler in a Si-SiO2 slot waveguide structure shows excellent power efficiency of 97.6% and can work in the C-band range with very low power loss. The design offers good flexibility for fabrication errors and can significantly reduce back reflection, making it suitable for integration into PICs working under the C-band range.
研究不足
The study is based on simulations and lacks experimental validation. The fabrication process and real-world application constraints are not fully explored.
1：Experimental Design and Method Selection:
The full-vectorial beam propagation method (FV-BPM) was used to find the optimal geometrical parameters of the MMI coupler, inputs/output taper, and the slot waveguide structure.
2：Sample Selection and Data Sources:
The study focused on Si slot-waveguide structures.
3：List of Experimental Equipment and Materials:
Rsoft-cad software alongside with Matlab script codes were used for simulations and analysis.
4：Experimental Procedures and Operational Workflow:
The simulations and analysis of the MMI 3 × 1 power combiner based on Si slot-waveguide were carried out.
5：Data Analysis Methods:
The insertion loss and back reflection were calculated using specific expressions.
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