Enlarged-range measuring device for the non-reciprocal phase shift produced in a ring interferometer, and measuring process.

摘要

The invention relates to an enlarged-range measuring device for a nonreciprocal phase shift produced in a ring interferometer and to a measuring process, and principally to an optical fibre gyrometer. It further relates to a measuring process, especially a process for measuring a speed of rotation.
<??>The invention relates to an improvement to a measuring device comprising a phase modulation device permitting the slaving of the phase with respect to an interference fringe of the device.
<??>The improvement consists principally in the fact that the light source (S) emits into the ring (2) a plurality of light frequencies in such a manner as to permit the elimination of the uncertainty as to the order (0, ©& , 2 ©& , etc) of the interference fringe with respect to which the slaving is carried out.
<??>The invention is applied especially to the construction of devices for measuring angular velocities.
<??>The invention is mainly applied to the construction of optical fibre gyrometers.
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