Sensor apparatus with polarization maintaining fibers

Details Sensor apparatus with polarization maintaining fibers Sensor apparatus with polarization maintaining fibers

G - Physics

01

D

G01D 5/353 (2006.01) G01D 5/34 (2006.01) G01J 4/00 (2006.01) G02B 6/10 (2006.01)

Patent

CA 2267913

A distributed sensor (10) includes a plurality of stages (24, 28, 32, 36, 40) connected in series, each stage incorporating a length of polarization maintaining fiber (12) exposed to a phenomena such as mechanical deformation or temperature to be sensed. Inter-mode couplers are provided between the sensing fibers (26, 30, 34, 38) of the various stages. The overall transfer function of the device at a plurality of wavelengths is deconvoluted to determine the birefringence of each sensing region and does monitor plural phenomena independently of one another.

Détecteur réparti (10) qui comporte une pluralité d'étages (24, 28, 32, 36, 40) connectés en série, chaque étage comprenant une longueur de fibre (12) conservant la polarisation exposée à un phénomène tel que la déformation mécanique ou la température à détecter. Des coupleurs intermode sont placés entre les fibres de détection (26, 30, 34, 38) des divers étages. La fonction globale de transfert du dispositif à une pluralité de longueurs d'onde est déconvoluée pour déterminer la biréfringence de chaque région de détection et surveille des phénomènes pluriels indépendamment les uns des autres.

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