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首页> 外文期刊>Journal of Lightwave Technology >Modeling of Tuning of Microresonator Filters by Perturbational Evaluation of Cavity Mode Phase Shifts
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Modeling of Tuning of Microresonator Filters by Perturbational Evaluation of Cavity Mode Phase Shifts

机译：微谐振腔滤波器相移的微分评估建模

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摘要

Microresonator filters, which are realized by evanescent coupling of circular cavities with two parallel bus waveguides, are promising candidates for applications in dense wavelength-division multiplexing. Tunability of these filters is an essential feature for their successful deployment. In this paper, we present a framework for modeling of tuning of the microresonators by changes in their cavity core refractive index. Using a reciprocity theorem, a perturbational expression for changes in the cavity propagation constants due to slight modifications of the cavity core refractive index is derived. This expression permits us to analytically calculate shifts in the spectral response of the 2-D resonators. Comparisons of the resultant shifts and spectra with direct simulations based on a coupled mode theory show satisfactory agreement.
机译：通过将圆形空腔与两个平行总线波导进行渐逝耦合来实现的微谐振器滤波器，有望用于密集波分复用中。这些过滤器的可调整性是成功部署它们的基本功能。在本文中，我们提供了一个通过微谐振器腔芯折射率的变化来建模微谐振器的建模框架。使用互易定理，得出因腔芯折射率的微小变化而引起的腔传播常数变化的微扰表达式。该表达式使我们能够分析地计算2-D谐振器的频谱响应中的偏移。通过基于耦合模式理论的直接模拟对所得位移和频谱进行比较，显示出令人满意的一致性。

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