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

## TL;DR

This paper presents a resonant fiber optic gyroscope utilizing Kagome hollow-core fiber, achieving high finesse and stability, demonstrating its potential for precise rotation measurements in advanced sensing applications.

## Contribution

It introduces a novel resonant fiber optic gyroscope based on Kagome fiber with optimized cavity and locking schemes, enhancing measurement stability and sensitivity.

## Key findings

- Achieved cavity finesse of 23 and linewidth of 700 kHz.
- Reached angular random walk of 0.004°/√h.
- Bias stability of 0.45°/h over 0.5 s.

## Abstract

We build a resonant fiber optic gyro based on Kagome hollow-core fiber. A semi-bulk cavity architecture based on a 18-m-long Kagome fiber permits to achieve 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 to reach an angular random walk as small as 0.004$^\circ/\sqrt{\mathrm{h}}$ and a bias stability of 0.45$^\circ$/h over 0.5 s of integration time.