Feng Yu, Wang Shumeng, Mashanovich Goran, Yan Jize
Opt Express. 2021 Sep 27;29(20):32505-32522. doi: 10.1364/OE.434400.
Based on Mason's signal flow graph analysis, an analytical model of the optical mode localization based on coupled ring resonators is established. The correctness of the theoretical model is proved by simulation. High sensitivity and common-mode rejection can be achieved by evaluating the modal power ratio from resonant peaks as sensing output. Based on the four-port structure, two output spectrum with mode localization (asymmetric mode splitting) and symmetric mode splitting allows the high-sensitivity sensing and dual-channel calibration to be carried out simultaneously, which can reduce the sensing errors. Monte-Carlo analysis showed that fabrication imperfection changes less than 6% of the performance in 90% cases, thus the construction of practical sensors is possible with appropriate tuning. The optical mode localized sensing has advantages in sensitivity, accuracy, anti-aliasing compared with conventional micro-mechanical mode localized sensor. Various types of high-sensitive sensor can be constructed through coupling parametric perturbation with measurands in different physical domains.
基于梅森信号流图分析，建立了基于耦合环形谐振器的光学模式局域化分析模型。通过仿真验证了理论模型的正确性。通过评估谐振峰处的模态功率比作为传感输出，可以实现高灵敏度和共模抑制。基于四端口结构，具有模式局域化（非对称模式分裂）和对称模式分裂的两个输出光谱允许同时进行高灵敏度传感和双通道校准，这可以减少传感误差。蒙特卡洛分析表明，在90%的情况下，制造缺陷对性能的影响小于6%，因此通过适当调整可以构建实用的传感器。与传统的微机械模式局域化传感器相比，光学模式局域化传感在灵敏度、精度、抗混叠方面具有优势。通过将参数扰动与不同物理域中的被测物耦合，可以构建各种类型的高灵敏度传感器。
