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Bias drift reduction in polarization-maintaining fiber gyroscope
Optics Letters
|September 10, 2009
Summary
This study analyzes errors in birefringent fiber gyroscopes caused by polarization cross-coupling. Techniques involving birefringence modulation and optical power balancing effectively suppress these errors, improving gyroscope accuracy.
Area of Science:
- Photonics
- Optical Engineering
- Fiber Optic Sensors
Background:
- Birefringent fiber gyroscopes are crucial for inertial navigation.
- Polarization cross-coupling introduces significant errors in gyroscope output signals.
- Understanding and mitigating these errors is essential for high-precision applications.
Purpose of the Study:
- To analyze the output signal of a birefringent fiber gyroscope.
- To identify specific sources of error related to polarization cross-coupling.
- To propose and demonstrate novel techniques for error suppression.
Main Methods:
- Analysis of the gyroscope's output signal.
- Identification of polarization cross-coupling effects in fiber and components.
- Implementation of fiber birefringence modulation.
- Balancing optical power in dual polarization modes.
Main Results:
- Specific error sources due to polarization cross-coupling were identified.
- Birefringence modulation effectively suppressed errors.
- Optical power balancing demonstrated significant error reduction.
- Proposed techniques were successfully demonstrated.
Conclusions:
- Polarization cross-coupling is a primary error source in birefringent fiber gyroscopes.
- Birefringence modulation and optical power balancing are effective suppression techniques.
- These methods enhance the accuracy and reliability of fiber optic gyroscopes.
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