A New Optical Method for Suppressing Radial Magnetic Error in a Depolarized Interference Fiber Optic Gyroscope

Area of Science:

• Optics
• Sensor Technology
• Physics

Background:

• Radial magnetic error (RME) is a significant challenge in depolarized interference fiber optic gyroscopes (D-IFOGs) operating under magnetic fields.
• Existing methods for RME mitigation may have limitations in effectiveness or complexity.

Purpose of the Study:

• To propose and validate a novel optical method for significantly reducing RME in D-IFOGs.
• To introduce a suppressing section fiber (SSF) as a key component for RME mitigation.

Main Methods:

• Development of a theoretical model based on RME principles in D-IFOGs.
• Numerical calculations to determine optimal SSF parameters.
• Simulation of RME suppression using the proposed SSF.
• Experimental verification of the theoretical model and simulation results.

Main Results:

• The theoretical model accurately predicts RME behavior with the SSF.
• Simulations demonstrate substantial RME reduction.
• Experimental results confirm effective suppression of RME by the SSF.
• The magnitude of RME was reduced to one-tenth of the original value.

Conclusions:

• The proposed optical method using a suppressing section fiber (SSF) is a viable and effective solution for mitigating radial magnetic error in D-IFOGs.
• This technique offers a significant improvement in gyroscope performance by reducing RME to one-tenth.
• The findings validate the theoretical model and simulation, paving the way for practical implementation.