MICHELSON FIBER OPTIC INTERFEROMETER AND ITS APPLICATION IN PARTICULAR TO TEMPERATURE MEASUREMENT

摘要

The interferometer includes an emitter arm 10 excited by a source 11 and a receiver arm 20 associated with a photodetector 21 provided by an optical coupler 50 to form a reference arm 30 and a measurement arm 40 terminated by a sensor 41. THE ARMS 30 AND 40 ARE CONSTITUTED BY ONE AND THE SAME OPTICAL FIBER WITH THE DIOPTRE OF THE FREE END 28 AS A PARTIALLY TRANSPARENT MIRROR FOR THE OPTICAL REFERENCE WAVE. THIS END 31 IS ACCOUPLETE TO THE SENSOR 41 WHICH RETURNS THE OPTICAL WAVE OF MEASUREMENT THROUGH THIS DIOPTRE. / P P APPLICATION IN PARTICULAR TO THE MEASUREMENT OF TEMPERATURES FOR EXAMPLE IN TURBOMACHINES OR FLUCTUATIONS OF FLOW DENSITY. / P