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Low-noise broadband-source-driven resonant fiber optic gyroscope
Optics Letters
|August 15, 2025
Summary
This study presents a low-noise resonant fiber optic gyroscope (RFOG) using optical cancellation. The novel design significantly improves the angle random walk (ARW) performance for enhanced precision and miniaturization.
Area of Science:
- Photonics and Optical Engineering
- Inertial Sensing Technologies
Background:
- Resonant Fiber Optic Gyroscopes (RFOGs) offer potential for high precision, low cost, and miniaturization.
- Key limitations in RFOG performance include Angle Random Walk (ARW) degradation from relative intensity noise (RIN) and shot noise.
Purpose of the Study:
- To demonstrate a low-noise broadband-source-driven RFOG.
- To improve ARW performance by mitigating RIN and shot noise limitations.
- To advance RFOG technology towards higher precision and miniaturization.
Main Methods:
- Implementation of an optical cancellation method.
- Utilization of a reflection-type fiber ring resonator (FRR) to enhance sensitivity and reduce sensing unit loss.
- Employing a broadband light source for RFOG operation.
Main Results:
- Achieved an Angle Random Walk (ARW) of 6.7 × 10-4°/√h using a 107-m-long FRR.
- Demonstrated the best-reported ARW performance for optic gyroscopes with similar fiber lengths.
- Validated the effectiveness of the optical cancellation method in reducing noise.
Conclusions:
- The developed RFOG scheme achieves superior ARW performance.
- The simple structure and lack of additional signal processing requirements facilitate practical implementation.
- This work represents a significant advancement for high-precision, miniaturized RFOG development.
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