The dynamic range and resolution of the weight function in microring resonator (MRR)-based neuromorphic photonic systems can be significantly enhanced through the implementation of advanced photonic integration techniques. One effective approach is the use of differential through-drop configurations. This configuration allows for independent monitoring of the through and drop ports, which can maximize the usable weight range. By employing separate photodetectors for each port, the system can achieve a higher extinction ratio, which directly correlates to improved dynamic range. This is because the differential setup can effectively cancel out common-mode noise and enhance the signal-to-noise ratio, leading to more precise weight adjustments.
Additionally, the integration of Contactless Integrated Photonic Probes (CLIPP) can further augment the performance of the weight function. CLIPP technology minimizes the power loss associated with traditional power splitters used for directing signals to monitoring photodetectors. By reducing the optical power loss, CLIPP can enhance the overall dynamic range of the system, allowing for finer adjustments in weight values. This reduction in power loss not only improves the accuracy and precision of the weight function but also enables the system to operate effectively under varying thermal conditions, thereby maintaining stability and performance across a broader range of operational scenarios.