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Acoustic emission detection using optical fiber based fabry perot sensor and quadrature recombination technique

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4 Author(s)
Raja P. Pappu ; Photonics Research Group, Aston University, Birmingham B4 7ET, UK ; Wei Zhang ; Ian Bennion ; Kate Sugden

In this paper we propose a novel fiber Bragg grating Fabry-Perot (FBG FP) fiber sensor for the detection of acoustic emission generated by the formation of structural defects in carbon composite structures.By setting the wavelengths of the two lasers in quadrature the measurement sensitivity can be maintained in spite of environmental perturbation, making this approach practical for real time applications.

Published in:

Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on

Date of Conference:

14-19 June 2009