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  • Received: Aug. 14, 2008

    Accepted: --

    Posted: Mar. 20, 2009

    Published Online: Mar. 20, 2009

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    Kuo Li, Zhen’an Zhou. A high sensitive fiber Bragg grating strain sensor with automatic temperature compensation[J]. Chinese Optics Letters, 2009, 7(3): 191

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Chinese Optics Letters, Vol. 7, Issue 3, 191 (2009)

A high sensitive fiber Bragg grating strain sensor with automatic temperature compensation

Kuo Li, and Zhen’an Zhou

Author Affiliations

  • Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085

Abstract

2 A high sensitive fiber Bragg grating (FBG) strain sensor with automatic temperature compensation is demonstrated. FBG is axially linked with a stick and their free ends are fixed to the measured object. When the measured strain changes, the stick does not change in length, but the FBG does. When the temperature changes, the stick changes in length to pull the FBG to realize temperature compensation. In experiments, 1.45 times strain sensitivity of bare FBG with temperature compensation of less than 0.1 nm Bragg wavelength drift over 100 oC shift is achieved.

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