| 摘要 |
The invention relates to a fiber-optic measurement device (10) comprising a SAGNAC ring interferometer (10) having a natural frequency fp. The aim of the invention is to improve response time while maintaining high precision across the measurement range. To this end, biasing means (130) are used to produce: a first biasing phase-differential modulation component DeltaPhib1(t) (34), which is periodic in time-slots, having levels +pi and -pi, at a first biasing modulation frequency fb1 such that fb1 = (2k1+1) fp, k1 being a natural number; and a second periodic biasing phase-differential modulation component A(|)b2(t) (35), having extreme amplitudes +pi/a and -pi/a, a being a non-zero real number such that | a | > 1, at a second biasing modulation frequency fb2 such thatfb2 =(2k2+1) fp, k2 being a non-zero natural number such that k2 > k1. The invention also relates to a gyrometer comprising such a measurement device and a navigation or inertial-stabilization system comprising at least one such gyrometer. |
