Variable coupler fiberoptic sensor and sensing apparatus...

G - Physics – 01 – D

Patent

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G01D 5/26 (2006.01) A61B 5/02 (2006.01) A61B 5/0245 (2006.01) A61B 5/11 (2006.01) G01B 11/00 (2006.01) G01D 5/353 (2006.01) G01H 9/00 (2006.01) G02B 6/00 (2006.01) G02B 6/26 (2006.01) G02B 6/287 (2006.01)

Patent

CA 2341430

A variable coupler fiberoptic sensor (20) utilizes a coupler having a fused coupling region (32) that can be deflected to change the light distribution to a plurality of output fibers (36) without putting the coupling region under tension. A compact, rugged, and highly sensitive sensor design is achieved by use of a coupler having a fused coupling region arranged substantially in a U- shape to allow the input fiberoptic leads (34) and output fiberoptic leads (36) to extend from the same side of the sensor structure.

L'invention concerne un capteur (20) à fibres optiques à coupleur variable dont le coupleur comporte une zone de couplage (32) réalisée par fusion pouvant être infléchie afin de modifier la distribution de lumière à une pluralité de fibres de sortie (36) sans mettre la zone de couplage sous tension. Pour obtenir un capteur compact, robuste et à haute sensibilité, on utilise un coupleur dont la zone de fusion est arrangée sensiblement en forme de U, de façon que les fils à fibres optiques d'entrée (34) et les fils à fibres optiques de sortie (36) puissent s'étendre à partir du même côté de la structure du capteur.

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