A multitude of large-scale silicon photonic systems based on ring resonators have been envisioned for applications ranging from biomedical sensing to quantum computing and machine learning. Yet, due to the lack of a scalable solution for controlling ring resonators, practical demonstrations have been limited to systems with only a few rings. Here, we demonstrate that large systems can be controlled by using only doped waveguide elements inside their rings while preserving their area and cost. We measure the large photoconductive changes of the waveguides for monitoring the rings’ resonance conditions across high-dynamic ranges and leverage their thermo-optic effects for tuning. This allows us to control ring resonators without requiring additional components, complex tuning algorithms, or additional electrical I/Os. We demonstrate automatic resonance alignment of 31 rings of a $16\times 16$ switch and of a 14-ring coupled resonator optical waveguide, making them the largest, yet most compact, automatically controlled silicon ring resonator circuits to date, to the best of our knowledge.

中文翻译：

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光电导加热器可控制大型硅光子环形谐振器电路

已经设想了许多基于环形谐振器的大规模硅光子系统，其应用范围从生物医学传感到量子计算和机器学习。然而，由于缺乏用于控制环形谐振器的可扩展解决方案，实际的演示仅限于只有几个环形的系统。在这里，我们证明了可以通过仅在其环内部使用掺杂的波导元件来控制大型系统，同时保留其面积和成本。我们测量波导的大光电导变化，以监测高动态范围内环的共振条件，并利用其热光效应进行调谐。这使我们能够控制环形谐振器，而无需其他组件，复杂的调谐算法或其他电气I / O。$16\times 16$ 开关和14环耦合谐振器光波导，使其成为迄今为止最大，最紧凑的自动控制的硅环谐振器电路。