Temperature insensitive accelerometer based on a strain-chirped FBG

Wenjun Zhou; Xinyong Dong; Kai Ni; C. C. Chan; P. Shum

doi:10.1117/12.835387

5 October 2009 Temperature insensitive accelerometer based on a strain-chirped FBG

Wenjun Zhou, Xinyong Dong, Kai Ni, C. C. Chan, P. Shum

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75033R (2009) https://doi.org/10.1117/12.835387
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

A novel accelerometer based on a strain-chirped optical fiber Bragg grating (FBG) is proposed. The FBG is glued in a slanted direction onto the lateral side of a right-angled triangle cantilever beam with a mass bonded on its free end. Vertical acceleration applied to the cantilever beam leads to a uniform bending along the beam length. As a result, the FBG is chirped and its reflection bandwidth changes linearly with the applied acceleration. A high sensitivity of 0.684 nm/g has been achieved in the experiment. This sensor is temperature insensitive, owning to the temperatureindependence nature of reflection bandwidth of the FBG.

Citation Download Citation

Wenjun Zhou, Xinyong Dong, Kai Ni, C. C. Chan, and P. Shum "Temperature insensitive accelerometer based on a strain-chirped FBG", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75033R (5 October 2009); https://doi.org/10.1117/12.835387

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