We report our in-house R&D efforts of designing and developing key integrated photonic devices and technologies for a chip-scale optical oscillator and/or clock. This would provide precision sources to RF-photonic systems. It could also be the basic building block for a photonic technology to provide positioning, navigation, and timing as well as 5G networks. Recently, optical frequency comb (OFC)-based timing systems have been demonstrated for ultra-precision time transfer. Our goal is to develop a semiconductor-based, integrated photonic chip to reduce the size, weight, and power consumption, and cost of these systems. Our approach is to use a self-referenced interferometric locking circuit to provide short-term stabilization to a micro-resonator-based OFC. For long-term stabilization, we use an epsilon-near-zero (ENZ) metamaterial to design an environment-insensitive cavity/resonator, thereby enabling a chip-scale optical long-holdover clock.

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开发芯片级光学时钟

我们报告了我们为芯片级光学振荡器和/或时钟设计和开发关键集成光子器件和技术的内部研发工作。这将为RF光子系统提供精确的光源。它也可能是光子技术提供定位，导航和计时以及5G网络的基本构件。最近，已经证明了基于光学频率梳（OFC）的计时系统可进行超精密的时间传递。我们的目标是开发一种基于半导体的集成光子芯片，以减少这些系统的尺寸，重量，功耗和成本。我们的方法是使用自参考干涉锁定电路为基于微谐振器的OFC提供短期稳定。为了长期稳定，