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:
Mar. 22, 2016
Filed:
Feb. 20, 2013
Herve Lefevre, Paris, FR;
Van-dong Pham, Le Kremlin Bicetre, FR;
Joachim Honthaas, Paris, FR;
IXBLUE, Saint-Germain-en-Laye, FR;
Abstract
A fiber-optic measurement device () includes a SAGNAC ring interferometer () having a proper frequency f. The aim is to improve response time while maintaining high precision across the measurement range. Biasing elements () are used to produce: a first biasing phase-differential modulation component Δφ(t) () which is periodic in time-slots, having levels +π and −π, at a first biasing modulation frequency fsuch that f=(2k+1) f, kbeing a natural number; and a second periodic biasing phase-differential modulation component Δφ(t) (), having extreme amplitudes +π/a and −π/a, a being a non-zero real number such that |a|>1, at a second biasing modulation frequency fsuch that f=(2k+1) f, kbeing a non-zero natural number such that k>k. A gyrometer including such a measurement device and a navigation or inertial-stabilization system including at least one such gyrometer are also described.