Ultrahigh-Sensitivity Fiber Acoustic Sensor with a Dual Cladding Modes Fiber Up-Taper Interferometer

Bo Dong, Banghong Zhang, Junhong Ng, Yixin Wang, Changyuan Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)


We propose a novel dual cladding modes fiber up-taper interferometer-based surface-mounted acoustic sensor. It consists of two optimized fiber fusion up-tapers along a single-mode fiber that enable it to excite dual cladding modes, which leads to its interference pattern with an extinction ratio of more than 20 dB, guaranteeing it to be used as an intensity-modulated fiber acoustic sensor (FAS) with an ultrahigh sensitivity. Under an acoustic pressure, its simultaneous responses in wavelength shift and intermodal power coupling change contribute to its ultrahigh sensitivity. The sensitivity of the proposed FAS reaches 2.65 V/μ Pa and is 33.5 times bigger than that of the piezoelectric acoustic sensor.
Original languageEnglish
Article number7174513
Pages (from-to)2234-2237
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number21
Publication statusPublished - 1 Nov 2015
Externally publishedYes


  • Dual cladding modes fiber interferometer
  • fiber acoustic sensor
  • fiber fusion up-tapers
  • surface-mounted acoustic sensor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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