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    Area of Science:

    • Photonics
    • Optical Computing
    • Integrated Optics

    Background:

    • Weighted addition is a fundamental operation in signal processing.
    • Microring resonators (MRRs) are key components for implementing weighted addition in silicon photonics.
    • Coherent inter-channel effects limit channel density in conventional MRR weight banks.

    Purpose of the Study:

    • To develop novel microring resonator (MRR) weight bank designs that overcome channel limitations.
    • To exploit unique inter-channel interference effects for improved performance.
    • To enhance the potential of reconfigurable analog photonic networks and multivariate microwave photonics.

    Main Methods:

    • Fabrication of two-pole microring resonator (MRR) designs.
    • Exploitation of inter-channel interference for robust performance.
    • Scaling analysis to predict channel count improvements.

    Main Results:

    • The proposed two-pole MRR designs demonstrate robustness to dynamic tuning and fabrication variations.
    • Scaling analysis predicts a 3.4-fold improvement in channel count compared to conventional methods.
    • The results show a significant enhancement over predictions based on incoherent analysis.

    Conclusions:

    • Novel MRR weight bank designs effectively utilize inter-channel interference to boost channel density.
    • These advances pave the way for more powerful reconfigurable analog photonic networks.
    • The work contributes to the field of multivariate microwave photonics with improved device performance.