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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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Closed-loop fiber-optic gyroscope with a sawtooth phase-modulated feedback.

A Ebberg, G Schiffner

|September 3, 2009

Summary

This summary is machine-generated.

This study details a fiber-optic gyroscope using sawtooth modulation for precise rotation sensing. Digital readout is achieved by linking modulation frequency to rotation rate, improving accuracy.

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Area of Science:

Optoelectronics
Inertial Navigation

Background:

Fiber-optic gyroscopes (FOGs) are crucial for inertial navigation.
Accurate rotation sensing is vital for various applications.

Purpose of the Study:

Investigate a closed-loop fiber-optic gyroscope design.
Develop a digital readout system for rotation rate measurement.

Main Methods:

Implemented phase nulling using sawtooth modulation on an integrated-optic phase modulator.
The modulation frequency is directly proportional to the rotation rate.
Analyzed the impact of finite flyback periods on the scale factor.

Main Results:

Demonstrated a functional closed-loop fiber-optic gyroscope.
Achieved digital readout of rotation rate via modulation frequency.
Quantified the influence of flyback period on scale factor accuracy.

Conclusions:

The proposed sawtooth modulation technique enables accurate digital readout in fiber-optic gyroscopes.
Understanding the flyback period's effect is essential for optimizing scale factor precision.