Sensitivity improvement of resonator integrated optic gyroscope by double-electrode phase modulation

Area of Science:

• Optical Engineering
• Sensor Technology
• Photonics

Background:

• Ring Interferometric Optical Gyroscopes (RIOGs) are crucial for inertial navigation.
• Improving RIOG sensitivity and bias stability remains a key research challenge.
• Existing single-electrode phase modulation (SPM) methods have limitations.

Purpose of the Study:

• To introduce and validate a novel double-electrode phase modulation (DPM) technology for RIOGs.
• To theoretically analyze and experimentally demonstrate the performance improvements offered by DPM.
• To establish a new benchmark for long-term bias stability in waveguide-type integrated optical resonators (IORs).

Main Methods:

• Theoretical analysis and calculation of scale factors for both SPM and DPM.
• Investigation of the relationship between slope rate and triangle waveform amplitudes.
• Experimental validation using a RIOG setup to measure scale factor and long-term bias stability.

Main Results:

• DPM significantly improves the RIOG scale factor from 1.49 to 2.76, aligning with simulations.
• DPM enhances bias stability, reducing it from 0.61 to 0.49 deg/s.
• The study achieved the best reported long-term bias stability for waveguide-type IORs.

Conclusions:

• DPM technology offers a substantial advantage over SPM for enhancing RIOG performance.
• The improved scale factor and bias stability are critical for advanced navigation systems.
• This work sets a new standard for high-performance optical gyroscopes.