研究目的
Investigating the design and performance of a high uniformity and broad bandwidth Y junction optical beam splitter based on silicon-on-insulator platform.
研究成果
The proposed Y junction beam splitter with a multimode tapered branch demonstrates broad bandwidth and high power uniformity, making it suitable for photonic integrated circuits requiring these characteristics. The design is less sensitive to fabrication accuracy compared to traditional models.
研究不足
The experimental insertion loss is higher than simulation results, possibly due to radiation loss from rough waveguide walls and imperfect tip. The study focuses on O band applications, limiting its generalizability to other wavelengths.
1：Experimental Design and Method Selection:
The study involves designing a Y junction optical beam splitter with a multimode tapered branch to improve bandwidth and power uniformity. Theoretical analysis and FDTD simulation methods are employed.
2：Sample Selection and Data Sources:
The study uses models with uniform branch, S branch, and tapered branch for comparison. Data is acquired through simulation and experimental fabrication.
3：List of Experimental Equipment and Materials:
Electron beam lithography (EBL) processing technology, SOI platform, Keysight 81608A tunable light source, Keysight N7744A optical power meter.
4：Experimental Procedures and Operational Workflow:
Fabrication involves coating E-beam resist, patterning with electron beam, etching, and depositing SiO2 cladding. Testing involves measuring insertion loss and return loss.
5：Data Analysis Methods:
The insertion loss and return loss are calculated and compared across different models. Power uniformity is analyzed by shifting the tip to simulate fabrication errors.
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