METHOD FOR EVALUATING THE INFLUENCE OF TEMPERATURE AND STRAIN ON THE SPECTRUM REFLECTED BY FIBRE BRAGG GRATING

摘要

The present invention is related to a method for evaluating temperature and/or strain affecting a fibre Bragg grating (FBG), comprising the steps of - determining the spectrum transmitted or reflected by said FBG, when launching light into said FBG, - determining at least two quantities characteristic of said transmitted or said reflected spectrum, - monitoring the evolution of said at least two characteristic quantities in response to a change in temperature and/or strain, - evaluating temperature and/or strain using information obtained from the previous step.