Suppression of the quantization error in a fiber optic gyroscope using a double-electrode-pair multifunction...

Area of Science:

• Optoelectronics
• Sensor Technology
• Control Systems

Background:

• Fiber optic gyroscopes (FOGs) face accuracy limitations due to quantization error, especially with weak signals and short sampling times.
• This error hinders FOGs in high-speed measurement and real-time control applications.
• Existing methods struggle to adequately suppress quantization error under demanding conditions.

Purpose of the Study:

• To propose and implement a novel multifunction integrated-optic circuit (MIOC) for FOGs.
• To significantly suppress quantization error in FOG output signals.
• To improve the resolution of FOGs for measuring extremely small angular rates at short smoothing times.

Main Methods:

• Development and implementation of a double-electrode-pair MIOC, featuring an additional pair of short electrodes.
• Utilizing the enhanced modulating precision of the additional electrode-pair for refined digital feedback.
• Designing specialized driving circuits and control schemes tailored for FOG applications.

Main Results:

• Significant suppression of quantization error in FOG output.
• Markedly improved resolution for detecting extremely small angular rates within short smoothing times.
• Demonstrated feasibility of the proposed MIOC for high-precision FOGs.

Conclusions:

• The proposed double-electrode-pair MIOC effectively mitigates quantization error in FOGs.
• This advancement enhances FOG performance for high-speed and real-time control systems.
• The developed MIOC offers potential for next-generation high-precision FOG applications.