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Rotation Measurements with a Passive Resonant Gyroscope Based on Hollow Core Fiber

We present rotation measurements performed with a passive resonant optical fibre gyroscope. The fibre used to realize the resonant cavity was a Kagome Hollow Core Fiber. Measurements were performed in two types of configurations. In the first configuration, the counter propagating beams resonate on the same cavity mode. This leads to observation of lock-in that prevents measuring rotation rates below roughly 1°/s. In the second configuration, the counter propagating beams resonate on two different cavity modes. This leads to rotation rates measurements below 0.1°/s that are currently limited by some drifts. We will describe in the conference possible sources of drifts and the solutions we consider to circumvent them.