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Updated: Jan 28, 2026
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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
17.5K
Analysis of Kerr Noise in Angular-Rate Sensing Based on Mode Splitting in a Whispering-Gallery-Mode Microresonator
Zhaohua Yang1, Dan Li2, Yuzhe Sun3
1School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing 100083, China. yangzh@buaa.edu.cn.
Micromachines
|March 1, 2019
Summary
Whispering-gallery-mode microresonators offer high-precision gyroscopes. This study analyzes Kerr noise in mode splitting, demonstrating its effective suppression for improved accuracy in angular-rate sensing.
Area of Science:
- Optics and Photonics
- Sensor Technology
- Metrology
Background:
- Whispering-gallery-mode (WGM) microresonators are promising for high-precision gyroscopes due to their small size and high quality factors.
- Kerr noise is a significant limitation in the accuracy of conventional resonator optical gyroscopes.
- Angular-rate sensing using mode splitting leverages backscattering, which can induce splitting but is typically a noise source.
Purpose of the Study:
- To analyze the mechanism of Kerr noise in mode-splitting-based angular-rate sensing.
- To derive mathematical expressions defining Kerr noise's relationship with system output.
- To investigate Kerr noise's influence on the accuracy of WGM microresonator gyroscopes.
Main Methods:
- Theoretical analysis of Kerr noise in mode splitting.
- Derivation of mathematical expressions for Kerr noise impact.
- Numerical simulations to quantify Kerr noise effects on angular-rate measurements.
Main Results:
- Kerr noise mechanism in mode splitting was analyzed and quantified.
- Mathematical expressions relating Kerr noise to system output were derived.
- Simulations showed minimal deviation (1.913 × 10-5 Hz) from Kerr noise at high angular rates (5 × 10⁶ °/s), with a corresponding angular rate deviation of 9.26 × 10-9 °/s.
Conclusions:
- Angular-rate sensing based on mode splitting demonstrates robust suppression of Kerr noise.
- The self-reference scheme inherent in mode splitting effectively mitigates Kerr noise.
- This approach enhances the potential for high-accuracy gyroscopic measurements using WGM microresonators.
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