Coherent Backscatter In The Phase-Modulated Fibre Optic Gyroscope

J. M. Mackintosh; J. L. McMillan; B. Culshaw

doi:10.1117/12.963607

6 October 1986 Coherent Backscatter In The Phase-Modulated Fibre Optic Gyroscope

J. M. Mackintosh, J. L. McMillan, B. Culshaw

Proceedings Volume 0630, Fibre Optics '86; (1986) https://doi.org/10.1117/12.963607
Event: Sira/Fibre Optics '86, 1986, London, United Kingdom

Abstract

This paper analyses on the effect of coherent backscatter on the output of the fibre optic gyroscope. By considering the phases and modulation efficiency of the backscatter beams, the analysis shows that Inertial Navigation performance should be able to be achieved by using relatively long coherence length sources, thus easing source wavelength stabilisation. The fundamental limit to the backscatter noise is shown to be due to the scattered components which are incoherent with the primary beams. The effect of the components which are coherent with the primary beams can be eliminated by use of the correct modulation frequency or polarisation control and tuning of the loop coupler.

Citation Download Citation

J. M. Mackintosh, J. L. McMillan, and B. Culshaw "Coherent Backscatter In The Phase-Modulated Fibre Optic Gyroscope", Proc. SPIE 0630, Fibre Optics '86, (6 October 1986); https://doi.org/10.1117/12.963607

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