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Navigation-grade three-axis resonant fiber-optic gyroscope employing a multiplexed source
Optics Letters
|May 15, 2023
Summary
A novel three-axis resonant fiber-optic gyroscope (RFOG) improves power utilization by reusing light sources. This design achieves navigation-grade performance with suppressed interference and low bias error.
Area of Science:
- Photonics and Optical Engineering
- Inertial Navigation Systems
Background:
- Three-axis gyroscopes are crucial for inertial measurement units (IMUs).
- Existing designs face challenges in power utilization and inter-axis interference.
Purpose of the Study:
- To propose and demonstrate a novel three-axis resonant fiber-optic gyroscope (RFOG) configuration.
- To enhance power efficiency and minimize bias error in multi-axis RFOGs.
Main Methods:
- Utilizing a multiplexed broadband light source where vacant ports serve as drive sources for other axes.
- Optimizing fiber-optic ring resonator (FRR) lengths to prevent inter-axis interference.
- Demonstrating a navigation-grade three-axis RFOG with approximately 100m fiber coil length per FRR.
Main Results:
- Achieved effective power utilization by reusing light sources.
- Suppressed the influence of input spectrum on the multiplexed RFOG.
- Obtained a theoretical temperature dependence of bias error as low as 1.08 × 10-4 °/h/°C.
Conclusions:
- The proposed multiplexed RFOG configuration offers a viable solution for high-performance inertial sensing.
- Optimized FRR lengths effectively mitigate interference and spectral influence.
- Demonstrated potential for navigation-grade applications through improved power efficiency and accuracy.
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