Tactical-grade interferometric fiber optic gyroscope driven with a narrow-linewidth laser

Seth W. Lloyd; Michel J. F. Digonnet; Shanhui Fan

doi:10.1117/12.886025

17 May 2011 Tactical-grade interferometric fiber optic gyroscope driven with a narrow-linewidth laser

Seth W. Lloyd, Michel J. F. Digonnet, Shanhui Fan

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77531V (2011) https://doi.org/10.1117/12.886025
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

We report for the first time a tactical-grade fiber optic gyroscope interrogated with a laser instead of a broadband source. The measured bias drift is 2.5 °/h and the random walk 0.016 °/√ h. This random walk is lower than when the same gyroscope is interrogated with a broadband source, while the drift is only ~3 times higher. This significant development was enabled by an appropriate choice of laser linewidth to mitigate backscattering effects, and careful control of spurious reflections. The benefits of using a laser include a much higher scale factor stability, lower power consumption, and lower component cost.

Citation Download Citation

Seth W. Lloyd, Michel J. F. Digonnet, and Shanhui Fan "Tactical-grade interferometric fiber optic gyroscope driven with a narrow-linewidth laser", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77531V (17 May 2011); https://doi.org/10.1117/12.886025

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