The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 2010
Filed:
Apr. 05, 2007
Alexandre Urgell, Boulogne Billancourt, FR;
Eric Willemenot, Plouzane, FR;
Thierry Gaiffe, St Germain-en-Laye, FR;
Alexandre Urgell, Boulogne Billancourt, FR;
Eric Willemenot, Plouzane, FR;
Thierry Gaiffe, St Germain-en-Laye, FR;
Ixsea, Marly-le-Roi, FR;
Abstract
The invention relates to a method and an optical-fiber measuring device including a light source with a light power P, a Sagnac ring interferometer in which propagate two counter-propagating waves, a detector receiving a light flux from the interferometer and converting it into an electrical signal representing the total phase difference δφbetween the counter-propagating waves. It also includes an electronic element receiving the electrical signal from the detector and providing a first signal Sfunction of the measured parameter. The electronic element includes a demodulator contributing to provide the first signal function of the measured parameter and provide a second signal Sfunction of the power P of the light flux measured by the detector. The optical phase modulator generates a disturbance component δφadding to the phase difference δφ=δφ+δφ.