研究目的
Demonstrating scalable microring weight bank control for large-scale photonic integrated circuits to achieve high accuracy and precision with negligible inter-channel crosstalk.
研究成果
The demonstrated MRR control scheme achieves high accuracy and precision with negligible inter-channel crosstalk, making it scalable to large networks. Future work could focus on increasing channel density and implementing other types of MRRs for improved control accuracy and efficiency.
研究不足
The calibration procedures require that the MRR channels have no spectral overlap, limiting the channel density. The approach may face challenges with spectral overlapping and optical nonlinearity at high input powers.
1：Experimental Design and Method Selection
The methodology involves using N-doped photoconductive heaters for thermal tuning of MRRs to achieve desired transmission values. Feedback control methods are employed for resonance locking and continuous transmission value configuration.
2：Sample Selection and Data Sources
Silicon weight banks fabricated on a silicon-on-insulator (SOI) wafer with specific dimensions and doping concentrations are used. Data is collected using optical spectrum analyzers and power meters.
3：List of Experimental Equipment and Materials
External cavity lasers (ECLs), arrayed waveguide grating (AWG) coupler, optical power meter (PM), Keithley 2400 source-meters, optical spectrum analyzer (OSA), and temperature-controlled stage.
4：Experimental Procedures and Operational Workflow
The procedure includes common parasitic resistance calibration, baseline calibration, photoresponse calibration, and transmission edge calibration. A control rule is developed for weight control based on these calibrations.
5：Data Analysis Methods
Data analysis involves measuring the accuracy and precision of weight control, evaluating inter-channel crosstalk, and characterizing the dynamic range in terms of input optical power and frequency offset.
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