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. 06, 2019
Filed:
Apr. 05, 2017
Thales, Courbevoie, FR;
Centre National DE LA Recherche Scientifique, Paris, FR;
Ecole Normale Superieure DE Cachan, Cachan, FR;
Sylvain Schwartz, Saint Remy les Chevreuse, FR;
Gilles Feugnet, Palaiseau, FR;
Arnaud Brignon, Bourg la Reine, FR;
Fabien Bretenaker, Velizy Villacoublay, FR;
THALES, Courbevoie, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris, FR;
ECOLE NORMALE SUPERIEURE DE CACHAN, Cachan, FR;
Abstract
A passive resonant optical gyroscope comprising a cavity and operating with three frequencies comprises: a first injecting laser to inject a first optical beam into the cavity in a first direction; a second injecting laser to inject a second optical beam into the cavity in an opposite direction; a third injecting laser to inject a third optical beam into the cavity in one of the aforementioned directions, one laser amongst the injecting lasers having a master frequency, the two other injecting lasers, called the first and second slave lasers, respectively having a first slave frequency and a second slave frequency; a master servocontrol device; a first servocontrol stage comprising first and second slave devices; and a second servocontrol stage comprising first and second optical phase-locking devices respectively comprising a first and second slave oscillator to generate a first radiofrequency offset signal and a second radiofrequency offset signal.