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Opt Lett. 1981 Aug 1;6(8):401-3.

Sagnac effect in fiber gyroscopes.

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  • 1Laboratoire Central de Recherche, Thomson CSF, BP 10, Domaine de Corbeville, 91401 Orsuy, France.


We review the kinematic explanation of the Sagnac effect in fiber gyroscopes and recall that the index of the dielectric medium does not have any influence. Furthermore, we present a novel electrodynamic approach that confirms in more detail that the Sagnac phase shift of a ring-waveguide interferometer is the same as for the original Sagnac experiment with plane waves in a vacuum.

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