Development of novel fiber Bragg grating underwater acoustic sensor

Jian Yang, Yong Zhao, Xingjie Ni

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

A new type of optical fiber underwater acoustic sensor (hydrophone) constructed with two fiber Bragg gratings (FBG) with signal self-demodulation function is presented. This fiber Bragg grating hydrophone uses a pair of matched fiber Bragg gratings with push-pull structure for both sensing and demodulating, which greatly reduces system complexity. The cylindrical structure of the hydrophone improves the sensitivity of the bare fiber Bragg grating acoustic sensors and also can compensate temperature. Simulation and preliminary experimental results indicate that the dynamic range of the hydrophone unit is beyond 100 dB and the measurement sensitivity can reach 0.36 nm/MPa for underwater acoustic pressure range 100-200 dB re 1μPa.

Original languageEnglish (US)
Pages (from-to)1575-1579
Number of pages5
JournalGuangxue Xuebao/Acta Optica Sinica
Volume27
Issue number9
StatePublished - Sep 1 2007

All Science Journal Classification (ASJC) codes

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

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