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Random walk reduction in dithered ring laser gyroscope.

Zhenfang Fan, Baolun Yuan, Hui Luo

|November 29, 2023

Summary

This summary is machine-generated.

Lock-in error compensation effectively eliminates random walk in dithered ring laser gyroscopes. This method reduces the random walk coefficient, enabling gyroscopes to approach their quantum limit.

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Area of Science:

Physics
Optical Engineering
Quantum Metrology

Background:

Ring laser gyroscopes are crucial for inertial navigation.
Lock-in crossing is a known phenomenon that introduces random walk errors in these devices.
Existing methods for mitigating lock-in errors have limitations.

Purpose of the Study:

To experimentally demonstrate the elimination of random walk in dithered ring laser gyroscopes.
To validate a lock-in error compensation technique.
To investigate the potential for approaching the quantum limit of gyroscope performance.

Main Methods:

Experimental implementation of lock-in error compensation in a dithered ring laser gyroscope.
Computer simulations to verify the compensation method's effectiveness.
Analysis of random walk coefficients before and after compensation.

Main Results:

Successful experimental elimination of random walk caused by lock-in crossing.
Significant reduction in the random walk coefficient, matching theoretical predictions.
Demonstration that gyroscopes with varying initial performance achieve similar low random walk levels post-compensation.

Conclusions:

Lock-in error compensation is a viable and effective method for mitigating random walk in ring laser gyroscopes.
The technique allows gyroscopes to approach their fundamental quantum limit.
This advancement has significant implications for high-precision inertial sensing.