Multi-mode fibre-optic sensor

摘要

The fibre-optic sensor according to the invention includes a multi-mode optical fibre (1) which has a curved part for forming a mode coupling section (2), means (5) for supplying a first end of the optical fibre with coherent light, means (6) for collecting a part of the light transmitted, downstream of the mode coupling section, and means (10) for detecting characteristic variations of the part of the light received. <IMAGE>