Research of a novel fiber Bragg grating underwater acoustic sensor

Xingjie Ni, Yong Zhao, Jian Yang

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A new type of optical fiber underwater acoustic sensor (hydrophone) constructed with two fiber Bragg gratings (FBG) and a self-demodulation method is presented in this paper. Unlike other FBG sensors which have separate sensing and demodulating elements, this FBG hydrophone has only a single structure for both sensing and demodulating using a pair of matched FBGs. The cylindrical structure of the hydrophone solves the problems of low sensitivity and cross-sensitivity of the bare fiber Bragg grating acoustic sensors. Theoretical analysis of measurement sensitivity is described. Simulation and preliminary experimental results indicate that the measurement sensitivity can reach 0.78 nm/MPa for underwater acoustic pressure in range of 100-200 dB re 1 μPa.

Original languageEnglish (US)
Pages (from-to)76-80
Number of pages5
JournalSensors and Actuators, A: Physical
Volume138
Issue number1
DOIs
StatePublished - Jul 20 2007

Fingerprint

Underwater acoustics
underwater acoustics
Fiber Bragg gratings
Hydrophones
Bragg gratings
hydrophones
fibers
sensors
Sensors
demodulation
Demodulation
Optical fibers
optical fibers
Acoustics
acoustics
sensitivity
simulation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

Cite this

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Research of a novel fiber Bragg grating underwater acoustic sensor. / Ni, Xingjie; Zhao, Yong; Yang, Jian.

In: Sensors and Actuators, A: Physical, Vol. 138, No. 1, 20.07.2007, p. 76-80.

Research output: Contribution to journalArticle

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