Measurement device, in a range extended, of a non phase shift results in a ring interferometer and method of measurement

摘要

The invention relates to a measuring device, in a wide range, of a nonreciprocal phase shift generated in a ring interferometer and method of measurement, and mainly to an optic fiber gyrometer. It also relates to a method of measurement, in particular a method for measuring the speed of rotation. / p & & p & the invention relates to an improvement of a measuring device comprising a phase modulation device making it possible to control the phase in an interference fringe of the device. / p & & p & the improvement consists mainly in the fact that the light source s emits in the ring 2, several frequencies of the light so as to make it possible to remove the uncertainty on the order 0, p 1, 2pi, etc. the interference fringe on which the control. / p & & p & in particular, the invention applies to the production of devices for measuring the angular speeds. / p & & p & the invention applies mainly to the production of optical fiber gyrometers.