Transducer with multimodal optical fibre and mode coupling and method for making same

Abstract

An optical fibre transducer is sensitive to at least one parameter of an environment in which it is located, the modification of the parameter(s) resulting in a modification of at least one measurable characteristic of a light wave injected into the optical fibre and flowing through the transducer, the optical fibre being multimodal and including an element adapted so that the modification of the light wave characteristic is based on a modification of mode coupling resulting from the modification of the environment parameter, the element leading to a mode coupling modification that generates, during the modification, a deformation of the optical fibre in the transducer according to a predetermined pattern. The element leading to the mode coupling modification is a hollow tube containing a relief pattern and surrounding the optical fibre at the transducer in a straight part of the fibre.

Dependencies are inferred from the claim text.