研究目的
To demonstrate a high-resolution spectrometer on silicon nitride by integrating micro-ring resonators and arrayed waveguide gratings (AWG) in tandem for applications in bio sensing and bio imaging.
研究成果
The proposed method of integrating micro-ring resonators with arrayed waveguide gratings offers a compact, broadband, and high-resolution spectrometer with potential for improved fabrication tolerance and reduced insertion loss and inter-channel crosstalk. Future optimizations include laser trimming of the MRR wavelengths and improved AWG design.
研究不足
The inter-channel crosstalk is 10dB, mainly limited by the crosstalk of the secondary-stage AWG. The channel spacing of the AWG is not exactly the same with the design, causing spectrum mismatch between the two stages.
1：Experimental Design and Method Selection:
The design involves integrating micro-ring resonators (MRR) with arrayed waveguide gratings (AWG) to achieve high resolution and wide free spectral range.
2：Sample Selection and Data Sources:
The device is fabricated on a silicon nitride multi-project wafer (MPW) platform and tested with a broadband superluminescent diode (SLD) and optical spectrum analyzer.
3：List of Experimental Equipment and Materials:
Silicon nitride wafer, SLD, optical spectrum analyzer, fiber-chip grating couplers.
4：Experimental Procedures and Operational Workflow:
Light is coupled into and out of the chip using fiber-chip grating couplers, and the transmission spectrum is measured.
5：Data Analysis Methods:
The transmission spectrum is analyzed to determine channel spacing and inter-channel crosstalk.
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