公开(公告)号：US10371524B2

公开(公告)日：2019-08-06

申请号：US15480129

申请日：2017-04-05

Applicant: THALES ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE ,  ECOLE NORMALE SUPERIEURE DE CACHAN

Inventor： Sylvain Schwartz ,  Gilles Feugnet ,  Arnaud Brignon ,  Fabien Bretenaker

IPC: G01C19/72

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.

公开(公告)号：US09803981B2

公开(公告)日：2017-10-31

申请号：US14504322

申请日：2014-10-01

Applicant: THALES

Inventor： Sylvain Schwartz ,  Gilles Feugnet ,  Fabien Bretenaker

IPC: G01C19/66 ,  G01C19/72

CPC classification number: G01C19/667 ,  G01C19/726

Abstract: The general field of the invention is that of passive resonator gyros comprising an injection laser emitting an initial optical beam at a first frequency and a fiber optic cavity. The gyro according to the invention operates with three optical beams at three different optical frequencies. A first beam is injected in a first direction of rotation, the second and the third beam are injected in the contrary direction. The gyro includes three slaving devices maintaining each optical frequency at a specific mode of resonance of the cavity. The gyro includes means for measuring the frequency differences existing between the different frequencies. Combined together, these differences are representative of the length of the cavity and the angular rotational velocity of the cavity along an axis perpendicular to its plane.

公开(公告)号：US20150098089A1

公开(公告)日：2015-04-09

申请号：US14504322

申请日：2014-10-01

Applicant: THALES

Inventor： Sylvain Schwartz ,  Gilles Feugnet ,  Fabien Bretenaker

IPC: G01C19/66

CPC classification number: G01C19/667 ,  G01C19/726

Abstract: The general field of the invention is that of passive resonator gyros comprising an injection laser emitting an initial optical beam at a first frequency and a fibre optic cavity. The gyro according to the invention operates with three optical beams at three different optical frequencies. A first beam is injected in a first direction of rotation, the second and the third beam are injected in the contrary direction. The gyro includes three slaving devices maintaining each optical frequency at a specific mode of resonance of the cavity. The gyro includes means for measuring the frequency differences existing between the different frequencies. Combined together, these differences are representative of the length of the cavity and the angular rotational velocity of the cavity along an axis perpendicular to its plane.

Abstract translation: 本发明的一般领域是包括在第一频率处发射初始光束的注入激光器和光纤腔的无源谐振器陀螺仪。 根据本发明的陀螺仪以三个不同光频率的三个光束操作。 第一光束以第一旋转方向注入，第二光束和第三光束以相反的方向注入。 陀螺仪包括保持每个光学频率处于空腔的特定谐振模式的三个从动装置。 陀螺仪包括用于测量不同频率之间存在的频率差的装置。 结合在一起，这些差异代表腔的长度和空腔沿着垂直于其平面的轴的角旋转速度。