A Novel Long Period Fiber Grating Sensor for Large Strain Measurement in High Temperature Environment


Critical buildings such as hospitals and police stations must remain functional immediately following a major earthquake event. Due to earthquake effects, they often experience large strains, leading to progressive collapses. Therefore, monitoring and assessing the large strain condition of critical buildings is of paramount importance to post-earthquake responses and evacuations in earthquake-prone regions. In this study, a novel large strain sensor based on the long period fiber grating (LPFG) technology is proposed and developed. CO2 laser induced LPFG sensors are characterized for such mechanical properties as strain sensitivity in extension and flexure, sensor stability, and measurement range. For practical applications, the need for LPFG sensor packaging is identified and verified in laboratory implementations. By introducing various strain transfer mechanisms, the strain sensitivity of LPFG sensors can be customized for different applications at corresponding strain transfer ratios.

Meeting Name

Asian-Pacific Network of Centers for Research in Smart Structures Technology (ANCRiSST) Workshop (2009: Jul. 28-31, Boston, MA)


Civil, Architectural and Environmental Engineering

Second Department

Electrical and Computer Engineering

Document Type

Article - Conference proceedings

Document Version


File Type





© 2009 Asian-Pacific Network of Centers for Research in Smart Structures Technology (ANCRiSST), All rights reserved.

Publication Date

01 Jul 2009

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