Distributed optical fibre sensor for sensing stress state

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United States of America Patent

PATENT NO 11175193
APP PUB NO 20180058956A1
SERIAL NO

15560474

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Abstract

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A distributed optical fiber sensor of dynamic stress state comprises: an optical assembly configured to generate a series of optical pulses; an optical fiber of optical length L; an optical system configured to: inject through the first end at least the series of optical pulses; receive at the level of the end at least one series of output optical pulses, arising from the input pulses after propagation and retro-propagation in the fiber; generate at least one continuous reference beam or reference optical pulses on the basis of the optical assembly or of output optical pulses; produce a series of interference zones corresponding to the interference between the reference beam or a reference pulse and a signal optical pulse arising from an output optical pulse; a holographic detector comprising: a liquid-crystal light valve, the valve disposed so that it at least partially covers the interference zones, and producing holograms on the basis of the interference zones; at least one optical detector configured to detect output optical signals diffracted by the holograms.

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Patent Owner(s)

Patent OwnerAddress
THALESTOUR CARPE DIEM PLACE DES COROLLES ESPLANADE NORD COURBEVOIE 92400
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE3 RUE MICHEL-ANGE PARIS CEDEX 16 75794
UNIVERSITE NICE SOPHIA-ANTIPOLIS28 AVENUE VALROSE NICE CEDEX 2 06103

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bortolozzo, Umberto Juan les Pins, FR 5 15
Bouffaron, Renaud Antibes, FR 2 4
Doisy, Martine Grasse, FR 9 60
Dolfi, Daniel Orsay, FR 24 318
Huignard, Jean-Pierre Paris, FR 87 1907
Molin, Stéphanie Draveil, FR 6 27
Peigne, Arnaud Mougins, FR 2 8
Residori, Stefania Juan les Pins, FR 4 14

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