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Proceedings Paper

Telecommunications tunnel monitoring system based on distributed optical fiber strain measurement
Author(s): Hiroshi Naruse; Koji Komatsu; Kazuhiko Fujihashi; Masaru Okutsu
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Paper Abstract

We have developed a system for monitoring telecommunications tunnels to improve the reliability of telecommunication and to reduce maintenance costs through early damage detection. Core components of the system are a Brillouin optical time-domain reflectometer (BOTDR), which allows distributed and long-distance strain measurement, and optical fiber sensors installed in tunnels. Experimental results show that this system can detect tunnel deformation with a measurement error of 0.1 mm from a contraction of 1 mm to an elongation of 6 mm over a span of 10 km. The system used in practice at present is introduced.

Paper Details

Date Published: 23 May 2005
PDF: 4 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.623645
Show Author Affiliations
Hiroshi Naruse, Access Network Service Systems Labs., NTT (Japan)
Koji Komatsu, Access Network Service Systems Labs., NTT (Japan)
Kazuhiko Fujihashi, NTT InfraNet (Japan)
Masaru Okutsu, NTT InfraNet (Japan)

Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors
Marc Voet; Reinhardt Willsch; Wolfgang Ecke; Julian Jones; Brian Culshaw, Editor(s)

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