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Rotation measurements using a resonant fiber optic gyroscope based on Kagome fiber

Alexia Ravaille, Gilles Feugnet, Benoît Debord, Frédéric Gérôme, Fetah Benabid, and Fabien Bretenaker

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Abstract

We build a resonant fiber optic gyro based on Kagome hollow-core fiber. A semi-bulk cavity architecture based on an 18-m-long Kagome fiber permits achieving a cavity finesse of 23 with a resonance linewidth of 700 kHz. An optimized Pound–Drever–Hall servo-locking scheme is used to probe the cavity in reflection. Closed-loop operation of the gyroscope permits reaching an angular random walk as small as 0.004°/h and a bias stability of 0.45°/h over 0.5 s of integration time.

© 2019 Optical Society of America

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