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Proceedings Paper

1-cm spatial resolution with large dynamic range in strain distributed sensing by Brillouin optical correlation domain reflectometry based on intensity modulation
Author(s): Sitthipong Manotham; Masato Kishi; Zuyuan He; Kazuo Hotate
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Paper Abstract

We experimentally demonstrate distributed strain measurement with a high spatial resolution and a large dynamic range by proposing a system for Brillouin optical correlation domain reflectometry with an intensity modulation scheme. With the optimized intensity modulation, the optical power spectrum of the light source is properly modified so that the accumulated background noise in the Brillouin gain spectrum is significantly reduced. It is confirmed that the proposed system enables us to extend the maximum measurable strain up to ~7000 με, which is sufficient for practical applications of a distributed sensing, with 1-cm spatial resolution. This resolution is the best result ever reported in reflectometries based on spontaneous Brillouing scattering by using a conventional single mode fiber.

Paper Details

Date Published: 30 January 2012
PDF: 8 pages
Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 835136 (30 January 2012); doi: 10.1117/12.914248
Show Author Affiliations
Sitthipong Manotham, The Univ. of Tokyo (Japan)
Masato Kishi, The Univ. of Tokyo (Japan)
Zuyuan He, The Univ. of Tokyo (Japan)
Kazuo Hotate, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 8351:
Third Asia Pacific Optical Sensors Conference
John Canning; Gangding Peng, Editor(s)

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