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Gyromètre optique basé sur une cavité résonante passive en fibre à cœur creux

Abstract : In this manuscript, we report the theoretical and experimental developments at TRT, TAV and LAC, aiming the realization of a hollow-core passive resonant fiber optical gyroscope that can achieve navigation grade performances. We mathematically describe the Sagnac effect, which is a relativistic effect used to optically probe mechanical rotations. Then, we detail the state of the art in passive resonant fiber optical gyroscope development. We identify their limitations, and explain why the hollow core fiber seems to be the best solution to cope with the actual limitations of such gyroscopes. We then focus on two different types of hollow core fibers: Kagome and photonic bandgap. We evaluate their performances in terms of transmission, polarization holding and backscattering. We describe the first measurement of a lock in region in a hollow core fiber passive optical gyroscope, i.e the range of rotation rates that cannot be measured because of backscattering. A mathematical model is propounded to link the lock in to the backscattering of the cavity. We then discuss the experimental protocol that we implemented to circumvent this limitation. Finally, we characterize the performances of our gyroscope based on these features
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Submitted on : Monday, January 7, 2019 - 4:54:07 PM
Last modification on : Tuesday, September 29, 2020 - 6:54:35 AM
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  • HAL Id : tel-01972444, version 1


Alexia Ravaille. Gyromètre optique basé sur une cavité résonante passive en fibre à cœur creux. Optique [physics.optics]. Université Paris Saclay (COmUE), 2018. Français. ⟨NNT : 2018SACLS411⟩. ⟨tel-01972444⟩



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