Ultrasound sensing based on an in-fiber dual-cavity Fabry-Perot interferometer

Optics Letters
Huibo FanXiaoyi Bao

Abstract

Highly sensitive and broadband ultrasound (tens of megahertz) detectors can extend the capabilities of photo-acoustic imaging in biomedical application and nondestructive test inspection. Here ultra-compact fiber-based multi-mode dual-cavity Fabry-Perot interferometer (DC-FPI) ultrasound sensors are proposed by splicing three sections of cleaved standard single-mode fibers with the fiber off-core cross section in the middle. The contrasts, reflectivity, and linewidths of the DC-FPIs have been comprehensively characterized. The broadband frequency responses, ranging from 5 kHz to 45.4 MHz, are demonstrated by using the high harmonics of a piezoelectric transducer centered at 3.7 MHz. In addition, the influences of different resonant modes in the DC-FPI on the ultrasound frequency response have been demonstrated. The high-frequency and broadband response of such a simple and cost-effective ultrasound device offers new opportunities to the industrial ultrasound-based and advanced biomedical applications.

References

Apr 2, 2005·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Aldo MinardoMichele Giordano
Aug 18, 2009·Optics Letters·Joel VillatoroValerio Pruneri
Aug 7, 2012·Interface Focus·Jeff Powers, Frederick Kremkau
Jun 7, 2014·Annual Review of Biomedical Engineering·Lihong V Wang, Liang Gao
Aug 20, 2014·Biomedical Optics Express·Robert NusterGuenther Paltauf
Nov 18, 2014·Optics Express·Maria V Chistiakova, Andrea M Armani
Nov 22, 2016·Biomedical Optics Express·Stefan PreisserWolfgang Drexler
Sep 29, 2017·Optics Letters·Heming Wei, Sridhar Krishnaswamy
Aug 23, 2018·Optics Express·Oleg VolodarskyAmir Rosenthal

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