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Zero-bias-suppressed angular velocity sensing via a dual-frequency optoelectronic oscillator
Optics Express
|July 30, 2025
Summary
This study introduces a novel dual-frequency optoelectronic oscillator (OEO) for angular velocity sensing. It significantly enhances sensitivity and zero-bias stability, improving environmental immunity for high-precision inertial sensing.
Area of Science:
- Optoelectronics
- Inertial Sensing
- Microwave Photonics
Background:
- Angular velocity sensors are crucial for inertial navigation and control systems.
- Conventional sensors face limitations in sensitivity and environmental stability.
- Optoelectronic oscillators (OEOs) offer potential for high-performance sensing.
Purpose of the Study:
- To propose and validate a novel dual-frequency optoelectronic oscillator (OEO) based angular velocity sensing scheme.
- To enhance sensitivity and zero-bias stability compared to existing methods.
- To improve immunity to environmental disturbances in inertial sensing.
Main Methods:
- Utilized a single OEO structure to generate dual microwave signals.
- Implemented differential sensing within a shared Sagnac loop.
- Leveraged the Sagnac effect for phase difference and opposite frequency shifts.
- Detected beat frequency for angular velocity measurement.
Main Results:
- Achieved a twofold enhancement in angular velocity sensitivity.
- Demonstrated over an 83-fold improvement in zero-bias stability.
- Effectively suppressed common-mode environmental perturbations.
- Amplified Sagnac-induced frequency shifts through differential detection.
Conclusions:
- The proposed dual-frequency differential sensing methodology offers superior performance.
- This approach significantly enhances environmental immunity and sensor stability.
- The novel OEO scheme shows substantial potential for high-precision inertial sensing applications.
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