Main > Photonics Research >  Volume 8 >  Issue 3 >  Page 03000303 > Article
  • Abstract
  • Abstract
  • Figures (6)
  • Tables (1)
  • Equations (0)
  • References (32)
  • Get PDF
  • View Full Text
  • Paper Information
  • Received: Sep. 2, 2019

    Accepted: Dec. 30, 2019

    Posted: Jan. 3, 2020

    Published Online: Feb. 14, 2020

    The Author Email: Bin Zhang (zhangbin5@mail.sysu.edu.cn), Zhaohui Li (lzhh88@mail.sysu.edu.cn)

    DOI: 10.1364/PRJ.376640

  • Get Citation
  • Copy Citation Text

    Jingshun Pan, Bin Zhang, Zhengyong Liu, Jiaxin Zhao, Yuanhua Feng, Lei Wan, Zhaohui Li. Microbubble resonators combined with a digital optical frequency comb for high-precision air-coupled ultrasound detectors[J]. Photonics Research, 2020, 8(3): 03000303

    Download Citation

  • Category
  • Spectroscopy
  • Share
Photonics Research, Vol. 8, Issue 3, 03000303 (2020)

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

Jingshun Pan1, Bin Zhang1,4,*, Zhengyong Liu1, Jiaxin Zhao1, Yuanhua Feng3, Lei Wan3, and Zhaohui Li1,2,5,*

Author Affiliations

  • 1Key Laboratory of Optoelectronic Materials and Technologies, School of Electrical and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
  • 2Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
  • 3Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
  • 4e-mail: zhangbin5@mail.sysu.edu.cn
  • 5e-mail: lzhh88@mail.sysu.edu.cn

Abstract

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 mPa/Hz is achieved by combining a high-Q (3×107) 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 3D air-coupled photoacoustic and ultrasonic imaging.