Microrings hold significant applications in optical analog computing and can be arranged in an array to establish photonic weight banks for matrix–vector multiplication. However, microrings face challenges in precision and stability due to the sensitivity to internal thermal crosstalk and environmental disturbances; thus, massive monitors (usually bulky instruments) are needed to calibrate weights of massive microrings. Until now, multiple microring synapses had not been simultaneously calibrated with only one monitor. To address this issue, we propose a single-monitoring scheme to simultaneously calibrate multiple microring weights. In the experiment, we demonstrate the ability to simultaneously calibrate weights of 16 microrings with excellent immunity to environmental fluctuations and internal crosstalk. Furthermore, the scalability of this scheme offers a novel outlook for enhancing the precision of large-scale microring-based systems while simultaneously mitigating the equipment demands associated with calibration.

中文翻译：

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多个微环突触的单显示器校准


微环在光学模拟计算中有着重要的应用，可以排列成阵列来建立用于矩阵向量乘法的光子权重库。然而，由于微环对内部热串扰和环境干扰的敏感性，在精度和稳定性方面面临挑战；因此，需要大型监视器（通常是笨重的仪器）来校准大型微环的重量。到目前为止，多个微环突触尚未仅用一台监视器同时校准。为了解决这个问题，我们提出了一种单一监测方案来同时校准多个微环重量。在实验中，我们展示了同时校准 16 个微环重量的能力，并且具有出色的抗环境波动和内部串扰能力。此外，该方案的可扩展性为提高大规模微环系统的精度提供了新颖的前景，同时减轻了与校准相关的设备需求。