Abstract
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 language | English |
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Article number | 7174513 |
Pages (from-to) | 2234-2237 |
Number of pages | 4 |
Journal | IEEE Photonics Technology Letters |
Volume | 27 |
Issue number | 21 |
DOIs | |
Publication status | Published - 1 Nov 2015 |
Externally published | Yes |
Keywords
- 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