Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, United Kingdom.
Phys Rev Lett. 2013 Aug 23;111(8):084101. doi: 10.1103/PhysRevLett.111.084101. Epub 2013 Aug 20.
Even though synchronization in autonomous systems has been observed for over three centuries, reports of systematic experimental studies on synchronized oscillators are limited. Here, we report on observations of internal synchronization in coupled silicon micromechanical oscillators associated with a reduction in the relative phase random walk that is modulated by the magnitude of the reactive coupling force between the oscillators. Additionally, for the first time, a significant improvement in the frequency stability of synchronized micromechanical oscillators is reported. The concept presented here is scalable and could be suitably engineered to establish the basis for a new class of highly precise miniaturized clocks and frequency references.
尽管自主系统中的同步已经被观察到超过三个世纪，但是关于同步振荡器的系统实验研究的报告是有限的。在这里，我们报告了在与相对相位随机漫步的减少相关联的耦合硅微机械振荡器中观察到的内部同步，该随机漫步被振荡器之间的反应耦合力的大小调制。此外，这是首次报道了同步微机械振荡器的频率稳定性有显著提高。这里提出的概念是可扩展的，可以进行适当的工程设计，为一类新的高精度微型时钟和频率基准奠定基础。
