DEVICE FOR CHARACTERIZING A PHYSICAL PHENOMENON BY ABLATION OF AN OPTICAL FIBRE WITH BRAGG GRATINGS

摘要

The present application relates to a device for characterizing a physical phenomenon comprising at least one optical fibre (4) with short Bragg gratings having constant spacing, at least one broad spectrum laser lighting source (1), an optical circulator (2) and a photoelectric detector (3) which is configured to measure a global flux of all the reflected radiation picked up at the output of the optical circulator (2), as a function of time. It also relates to a method of characterization in which the global flux of the signal is measured in such a way that a drop in the signal corresponds to the destruction of a Bragg grating.