Gao Ge, Li Danping, Zhang Yong, Yuan Shuai, Armghan Ammar, Huang Qingzhong, Wang Yi, Yu Jinzhong, Xia Jinsong
Opt Express. 2015 Oct 19;23(21):26895-904. doi: 10.1364/OE.23.026895.
In this paper, a single microring resonator structure formed by incorporating a reflectivity-tunable loop mirror is demonstrated for the tuning of resonance spacing. Autler-Townes splitting in the resonator is utilized to tune the spacing between two adjacent resonances by controlling the strength of coupling between the two counter-propagating degenerate modes in the microring resonator. A theoretical model based on the transfer matrix method is built to analyze the device. The theoretical analysis indicates that the resonance spacing can be tuned from zero to one free spectral range (FSR). In experiment, by integrating metallic microheater, the tuning of resonance spacing in the range of the whole FSR (1.17 nm) is achieved within 9.82 mW heating power dissipation. The device has potential for applications in reconfigurable optical filtering and microwave photonics.
本文展示了一种通过并入反射率可调环镜形成的单微环谐振器结构，用于谐振间距的调谐。利用谐振器中的奥特勒-汤斯分裂，通过控制微环谐振器中两个反向传播简并模式之间的耦合强度来调谐两个相邻谐振之间的间距。建立了基于传输矩阵法的理论模型来分析该器件。理论分析表明，谐振间距可从零调谐到一个自由光谱范围（FSR）。在实验中，通过集成金属微加热器，在9.82 mW的加热功耗内实现了在整个FSR范围（1.17 nm）内的谐振间距调谐。该器件在可重构光学滤波和微波光子学方面具有应用潜力。
