In this paper we report the realization of a new version of a multimode fiber optic gyroscope (MFOG). The aim our work
is to demonstrate that we can improve the performances of such device by an appropriate choice of its components, in
the frame of the compromise low cost/ high performances realization. Our MFOG set up uses 1031 m of step index
50/125 μm multimode fiber in the sensing coil, the first coupler is a standard fused coupler whereas the second one is a
micro-optic coupler. The preliminary results show that the observed sensitivity of the prototype is ~0.05 °/sec and the
measured dynamic range is ±34°/sec.
In this work, we report a theoretical study for optimizing the optical components choice to design a new low cost and
high performances multimode fiber optic gyroscope (MFOG). This study shows that high performances can be obtained
by using all optical components with the same SI 50/125 multimode optical fiber associated with low coherence light
source, such as a LED, and a photodetector with large active area. For further improvement of MFOG performances, we
present a detailed analysis of the photo-detection circuits design considerations.
In this paper, we proposes a general model for describing and analysing the operation of the multimode fiber optic
gyroscope (MFOG). In this model, each fiber gyroscope components is modeled by an electrical field transfer matrix.
The output intensity is expressed in terms of the rotation rate and of the components parameters. The simulation results
show that performances enhancement can be obtained by employing a symmetrical multimode coupler and low coherent