We report the observation of a parametric instability in the out-of-equilibrium steady state of two coupled Kerr microresonators coherently driven by a laser. Using a resonant excitation, we drive the system into an unstable regime, where we observe the appearance of intense and well resolved sideband modes in the emission spectrum. This feature is a characteristic signature of self-sustained oscillations of the intracavity field. We comprehensively model our findings using semiclassical Langevin equations for the cavity field dynamics combined with a linear stability analysis. The inherent scalability of our semiconductor platform, enriched with a strong Kerr nonlinearity, is promising for the realization of integrated optical parametric oscillator networks.

中文翻译：

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耦合非线性微腔中的参数不稳定性

我们报告观察到由激光器相干驱动的两个耦合的Kerr微谐振器在不平衡稳态下的参数不稳定性。使用共振激励，我们将系统驱动到一个不稳定的状态，在该状态下我们观察到发射光谱中出现了强烈且分辨良好的边带模式。该特征是腔内场自持振荡的特征标记。我们使用半经典Langevin方程对腔场动力学与线性稳定性分析进行综合，对发现进行建模。我们的半导体平台固有的可扩展性，以及强大的Kerr非线性特性，对于实现集成光学参量振荡器网络很有希望。