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Proceedings Article

Distributed fiber Brillouin strain sensing by correlation-based continuous-wave technique: cm-order spatial resolution and dynamic strain measurement

[+] Author Affiliations
Kazuo Hotate, Sean S. Ong

Univ. of Tokyo (Japan)

Proc. SPIE 4920, Advanced Sensor Systems and Applications, 299 (September 10, 2002); doi:10.1117/12.481988
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From Conference Volume 4920

  • Advanced Sensor Systems and Applications
  • Yun-Jiang Rao; Julian D. C. Jones; Hiroshi Naruse; Robert I. Chen
  • Shanghai, China | October 14, 2002

abstract

This paper describes a novel correlation-based technique for fiber optic distributed strain sensors using Brillouin scattering. Conventional Brillouin-based sensors utilize a pulsed-pump similar to that of OTDR and are capable of distributed strain sensing over large distances, but suffer an inherent spatial resolution limit of around 1m. In addition, unlike FBG-based strain sensors which are competent of measuring dynamic strain, the pulse-based Brillouin sensors have large measurement times of several minutes, making them inadequate for dynamic strain measurements. On the other hand, using the correlation-based continuous-wave technique, we have achieved static distributed strain measurements of up to 1cm spatial resolution, and dynamic strain measurements of up to 8.8Hz from a 5cm strained section.

© (2002) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Kazuo Hotate and Sean S. Ong
"Distributed fiber Brillouin strain sensing by correlation-based continuous-wave technique: cm-order spatial resolution and dynamic strain measurement", Proc. SPIE 4920, Advanced Sensor Systems and Applications, 299 (September 10, 2002); doi:10.1117/12.481988; http://dx.doi.org/10.1117/12.481988


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