Low-Latency Passive Thermal Stabilization of a Silicon Micro-Ring Resonator with Self-Heating
Publication Date: 7/25/2024
Event: APL Photonics
Reference: 9, 076117, 1-11, 2024
Authors: Joshua C. Lederman, Princeton University; Simon Bilodeau, Princeton University; Eli Doris, Princeton University; Eric C. Blow, NEC Laboratories America, Inc.; Weipeng Zhang, Princeton University; Yusuf Jimoh, Princeton University; Bhavin J. Shastri, Queens University; Paul R. Prucnal, Princeton University
Abstract: Analog photonic information processing can be implemented with low chip area using wavelength-division multiplexed systems, which typically manipulate light using micro-ring resonators. Micro-rings are uniquely susceptible to thermal crosstalk, with negative system performance consequences if not addressed. Existing thermal sensitivity mitigation methods face drawbacks including high complexity, high latency, high digital and analog hardware requirements, and CMOS incompatibility. Here, we demonstrate a passive thermal desensitization mechanism for silicon micro-ring resonators exploiting self-heating resulting from optical absorption. We achieve a 49% reduction in thermal crosstalk sensitivity and 1 ?s adaptation latency using a system with no specialized micro-ring engineering, no additional control hardware, and no additional calibration. Our theoretical model indicates the potential for significant further desensitization gains with optimized microring designs. Self-heating desensitization can be combined with active thermal stabilization to achieve both responsiveness and accuracy or applied independently to thermally desensitize large photonic systems for signal processing or neural network inference.
Publication Link: https://doi.org/10.1063/5.0212591
