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Scale factor improvement for angular velocity measurement based on an optoelectronic oscillator.
Optics Letters
|November 2, 2019
Summary
This study presents an improved angular velocity measurement technique using a Sagnac loop and optoelectronic oscillator (OEO). The novel method enhances measurement sensitivity by mapping phase differences into frequency shifts with a high scale factor.
Area of Science:
- Photonics and Optical Engineering
- Sensing and Measurement Technologies
Background:
- Angular velocity measurement is crucial in various scientific and industrial applications.
- Traditional methods may face limitations in sensitivity and scale factor.
Purpose of the Study:
- To propose and demonstrate a novel scheme for angular velocity measurement.
- To achieve an improved scale factor for enhanced measurement sensitivity.
Main Methods:
- Joint operation of a Sagnac loop and an optoelectronic oscillator (OEO).
- Mapping Sagnac-induced phase difference into OEO frequency shift via carrier-suppressed modulation.
- Cascaded Sagnac loop and OEO structure for independent optimization.
Main Results:
- Experimental demonstration of the proposed angular velocity measurement scheme.
- Achieved a high sensitivity scale factor of 742 kHz/(rad/s).
- The cascaded structure allows independent tuning of loop lengths to further improve the scale factor.
Conclusions:
- The proposed scheme offers a significant improvement in angular velocity measurement sensitivity.
- The integration of Sagnac loop and OEO provides a flexible and effective platform for high-performance sensing.
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