Distributed sensing with OFDR and its application to structural health monitoring

Hideaki Murayama; Hirotaka Igawa; Koji Omichi; Yuichi Machijima

doi:10.1117/12.886028

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17 May 2011 Distributed sensing with OFDR and its application to structural health monitoring

Hideaki Murayama, Hirotaka Igawa, Koji Omichi, Yuichi Machijima

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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 775305 (2011) https://doi.org/10.1117/12.886028
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

Optical fiber sensors are promised candidates as sensor elements in structural health monitoring (SHM). Especially fiber-optic distributed strain sensors that return a strain value as a function of linear position along an optical fiber have been attractive for people in the field of SHM. We have developed a distributed strain sensing system using long-length fiber Bragg gratings (FBGs), based on optical frequency domain reflectometry (OFDR). We employ long-length FBGs whose length is about 100 mm and the sensing region, in other words the gauge length, can be expanded up to more than 1 m by serially-cascaded long-length FBGs. This sensing system has the high spatial resolution of less than 1 mm. In this paper the distributed sensing system with OFDR and its application to SHM are described.

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Hideaki Murayama, Hirotaka Igawa, Koji Omichi, and Yuichi Machijima "Distributed sensing with OFDR and its application to structural health monitoring", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 775305 (17 May 2011); https://doi.org/10.1117/12.886028

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