Nguyen Bui Quoc Huy, Maksymov Ivan S, Suslov Sergey A
Optical Sciences Centre, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia.
Department of Mathematics, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia.
Sci Rep. 2021 Jan 8;11(1):38. doi: 10.1038/s41598-020-79567-6.
We propose a new approach to the generation of acoustic frequency combs (AFC)-signals with spectra containing equidistant coherent peaks. AFCs are essential for a number of sensing and measurement applications, where the established technology of optical frequency combs suffers from fundamental physical limitations. Our proof-of-principle experiments demonstrate that nonlinear oscillations of a gas bubble cluster in water insonated by a low-pressure single-frequency ultrasound wave produce signals with spectra consisting of equally spaced peaks originating from the interaction of the driving ultrasound wave with the response of the bubble cluster at its natural frequency. The so-generated AFC posses essential characteristics of optical frequency combs and thus, similar to their optical counterparts, can be used to measure various physical, chemical and biological quantities.
我们提出了一种生成声频梳（AFC）信号的新方法，其频谱包含等距的相干峰。AFC对于许多传感和测量应用至关重要，而在这些应用中，成熟的光学频率梳技术存在基本的物理限制。我们的原理验证实验表明，由低压单频超声波照射的水中气泡簇的非线性振荡产生的信号，其频谱由等间隔的峰值组成，这些峰值源于驱动超声波与气泡簇在其固有频率下的响应之间的相互作用。如此产生的AFC具有光学频率梳的基本特征，因此，与它们的光学对应物类似，可用于测量各种物理、化学和生物量。
