Telecommunications tunnel monitoring system based on distributed optical fiber strain measurement

Hiroshi Naruse; Koji Komatsu; Kazuhiko Fujihashi; Masaru Okutsu

doi:10.1117/12.623645

23 May 2005 Telecommunications tunnel monitoring system based on distributed optical fiber strain measurement

Hiroshi Naruse, Koji Komatsu, Kazuhiko Fujihashi, Masaru Okutsu

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623645
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

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.

Citation Download Citation

Hiroshi Naruse, Koji Komatsu, Kazuhiko Fujihashi, and Masaru Okutsu "Telecommunications tunnel monitoring system based on distributed optical fiber strain measurement", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623645

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