Process and apparatus for the absolute and independent measurement of mechanical and thermal magnitudes that act simultaneously on an optical fibre

摘要

The process and the apparatus for its execution provide for the accomplishment of a measurement of dispersion of a sensor optical fibre (3). Such measurement is preferably made by means of a first and a second measurement of optical path, preferably of the non-incremental interferometric type, of the signal at output from the sensor optical fibre (3), centred on a first and a second wavelength, respectively, and a combination of the results of the abovementioned measurements so as to obtain two distinct values indicative of the physical magnitudes being measured.