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

By Kuo Li and Zhen’an Zhou

Abstract

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 ◦C shift is achieved

Topics: 090000 ENGINEERING, Strain Sensor, Fiber Bragg grating (FBG), Automatic temperature compensation
Publisher: Optical Society of America
Year: 2009
OAI identifier: oai:eprints.qut.edu.au:50857

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