Microbubble resonators combined with a digital optical frequency comb for high-precision air-coupled ultrasound detectors  

作　　者：JINGSHUN PAN BIN ZHANG ZHENGYONG LIU JIAXIN ZHAO YUANHUA FENG LEI WAN ZHAOHUI LI 

机构地区：[1]Key Laboratory of Optoelectronic Materials and Technologies,School of Electrical and Information Technology,Sun Yat-sen University,Guangzhou 510275,China [2]Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519000,China [3]Department of Electronic Engineering,College of Information Science and Technology,Jinan University,Guangzhou 510632,China

出　　处：《Photonics Research》2020年第3期303-310,共8页光子学研究（英文版）

基　　金：Key Project in Broadband Communication and New Network of the Ministry of Science and Technology(MOST)(2018YFB1801003);National Natural Science Foundation of China(61435006,61490715,61525502,61975242);Local Innovation and Research Teams Project of Guangdong Pearl River Talents Program(2017BT01X121);Science and Technology Planning Project of Guangdong Province(2017B010123005,2018BT010114002);We thank Prof. Xuefeng Zhu andDr. Pengqi Li at Huazhong University of Science andTechnology for testing the data of pressure in air as a functionof the driving voltage. We also thank Prof. Xuming Zhangat Hong Kong Polytechnic University and Prof. Hairun Guoat Shanghai University for discussing the results of MBRsusing DOFC method.

摘　　要：Fast and sensitive air-coupled ultrasound detection is essential for many applications such as radar,ultrasound imaging,and defect detection.Here we present a novel approach based on a digital optical frequency comb(DOFC)technique combined with high-Q optical microbubble resonators(MBRs).DOFC enables precise spectroscopy on resonators that can trace the ultrasound pressure with its resonant frequency shift with femtometer resolution and sub-microsecond response time.The noise equivalent pressure of air-coupled ultrasound as low as 4.4 m Pa∕pHz is achieved by combining a high-Q(~3×10~7)MBR with the DOFC method.Moreover,it can observe multi-resonance peaks from multiple MBRs to directly monitor the precise spatial location of the ultrasonic source.This approach has a potential to be applied in 3 D air-coupled photoacoustic and ultrasonic imaging.

关 键 词：optical PRECISE BUBBLE 

分 类 号：TN751.2[电子电信—电路与系统] TB559[理学—物理]